Environment Amco Energy August 2014

Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report

Prepared by: ...... Checked by: ...... Brian Sutton Ursula Jones Principal Ecologist Senior Ecologist

Approved by: ...... Kevin Webb Associate Director

Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report

Rev No Comments Checked by Approved Date by First Draft for Client Comment UJ KW 29/08/2014 1 Second Draft for Client Comment UJ KW 04/09/2014 2 Final Issue UJ KW 09/09/2014 3 Final Issue – Addition of Correct App’ A Fig’ 4 Phase 1 Map and App’ UJ KW 15/09/2014 B Fig’ 1 Proposed Layout, Am mended titles to Figure

9th Floor, The Clarence West Building, 2 Clarence Street West, Belfast, BT2 7GP Telephone: 028 9060 7200 Website: http://www.aecom.com

Job No 60322815 Reference 3536 Date Created August 2014

This document has been prepared by AECOM Limited for the sole use of our client (the “Client”) and in accordance with generally accepted consultancy principles, the budget for fees and the terms of reference agreed between AECOM Limited and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM Limited, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM Limited.

\\eu.aecomnet.com\euprojectvol\ukcdf1-ie\projects\environmental\jobs - potential\2013\2013 q3\dcww llys y fran\020 ecology reports\hra screening\llys y fran reservoir hydroelectric turbine installation hra screening final v4.docx

Table of Contents

1 Introduction ...... 1 2 Screening Assessment Methodology (The Likely Significance Test) ...... 3 3 Identification of Natura 2000 Sites ...... 4 4 Assessment and Assumptions ...... 6 5 Screening Assessment – The Likely Significance Test ...... 8 6 References ...... 12 7 Screening Matrices ...... 13 Appendix A: Figures ...... 19 Appendix B: Projected Site Layout Figure ...... 20 Appendix C: Natura 2000 Site Conservation Objectives ...... 21

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 1

Capabilities on project: Environment

1 Introduction

1.1 Introduction AECOM were commissioned by Amco Energy to undertake an initial ecological assessment of the site of a proposed additional hydropower turbine at Llys-y-Frân Reservoir, Pembrokeshire, National Grid Reference (NGR) SN0379224251. A survey of the site was undertaken on 22nd July 2014 and the report published: Ecological Constraints Report – Llys Y Frân Reservoir, Pembrokeshire (AECOM, 2014) (Appendix A, Figure 1).

The site (as defined by the Site Boundary in Appendix A, Figure 2) lies within Afonydd Cleddau/Cleaddau Rivers Special Area of Conservation (SAC) and Afon Cleddau Dwyreiniol/Eastern Cleddau River Site of Special Scientific Interest (SSSI) (Appendix A, Figure 3). Amco Energy intends to submit a planning application for the installation of a hydroelectric turbine and associated infrastructure at the Llys-y-Frân site (the “proposed development”). Under the European Directive 92/43/EEC (The Habitats Directive), the competent authority (in this instance Natural Resources Wales) is required, to ascertain whether the proposed development has the potential for Likely Significant Effects (LSEs) on sites with European Designations including Special Protection Areas (SPAs), Special Areas of Conservation (SACs) and Ramsar sites (all hereafter referred to as Natura 2000 sites). Where LSEs are identified, the competent authority is required to make an Appropriate Assessment of the implications of the proposed development on those sites in view of those site's conservation objectives. Guidance (David Tyldesley and Associates, 2011; EC, 2000 & 2001) states that if, as a result of HRA screening, the developer concludes that there is no LSE on a European site, sufficient information must be provided with the planning application to allow the competent authority to assess and review the information and make its own determination that there are no LSE’s, and be satisfied that there is no residual effect. A developer should provide reasons why it is considered that an Appropriate Assessment will not be required and provide confirmation from the nature conservation body that this conclusion is supported. This HRA conclusion should be explained in a ‘No Significant Effects Report’. If there are likely to be significant effects on a European site, a Statement to Inform Appropriate Assessment (STIAA) should be prepared and submitted with the planning application to enable the competent authority to undertake an Appropriate Assessment. Appropriate Assessment considers if the likely significant effects will adversely affect the integrity of the site in view of its conservation objectives. The guidance identifies that it is the responsibility of the developer to include ‘sufficient information’ with the planning application at acceptance to identify the European sites and to enable the Appropriate Assessment to be made, if required. 1.2 The Proposed Development Llys y Frân Reservoir dam and associated infrastructure controls the flow release to the Afon Syfynwy in order to support abstraction at Dwr Cymru Wlesh Water’s (DCWW’s) Canaston Bridge pumping station, located approximately 15km downstream. The reservoir currently feeds an existing 30kW Gilkes Turgo turbine, which discharges approximately 13megalitres (ML)/day (150litres/second). The proposed development seeks to take advantage of the energy available in the outlet discharge by connecting a new transfer pipe from one or both of the existing outlet pipes to a new hydroelectric turbine located in a new turbine house. The water from the turbine house would then discharge into the existing stilling basin via a discharge chamber and the power generated would be fed to a new standalone transformer building. The development would be located immediately downstream of the Llys-y-Frân Reservoir spillway within the existing DCWW site. The candidate turbine being proposed is the ‘Francis turbine’ by Gilkes and the power generated would be exported to the National Grid through the existing grid connection. The proposed layout of the scheme is shown in Appendix B. The proposed development will include the erection of a new turbine house within a hardstanding area with perennial vegetation growing in cracks in the mortared stone pitching and a new transformer house within an area of dense scrub (Appendix A, Figure 4). Associated buried cables will run through hardstanding with perennial species, hardstanding and scrub habitats. Areas of hardstanding with perennial species, scrub and hard standing on site will be removed as part of the development.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 2

Capabilities on project: Environment

The proposed construction works require a partial and/or full drain of the standing water present within the stilling basin within the site boundary and the flow from the reservoir above into the stilling basin to cease. The drained water will discharge into the Afon Syfynwy and the water from the reservoir will be redirected via an existing valve into the Afon Syfynwy. The assessment of the potential impacts of the scheme on Natura sites is based on this current understanding of the proposed development. 1.3 Rationale The construction of the proposed turbine and associated infrastructure, and the operation of the completed turbine have the potential to have a significant effect on the designation features and conservation objectives of the Afonydd Cleddau/Cleaddau Rivers SAC. EC Directive 92/43/EEC on the conservation of natural habitats and of wild fauna and flora (the Habitats Directive) requires that a Habitats Regulations Assessment (HRA) is carried out for a proposed scheme to inform the decision making process when the proposed scheme may have a significant effect on a site of European conservation importance that has been designated as a constituent part of the Natura 2000 network. Development on or adjacent to Natura 2000 sites is strictly regulated. The Habitats Directive stipulates that where a policy, project or plan, either in isolation or combination with others, is likely to have a significant impact upon a Natura site, an ‘Appropriate Assessment’ must be made under Article 6(3) of the Habitats Directive. The HRA process must be applied to designated sites and candidate/proposed sites. 1.4 Habitat Regulations Assessment Methodology The purpose of a Habitats Regulations Assessment (HRA) under Article 6 of the Habitats Directive is to assess the impacts of a project, in combination with the effects of other plans and projects, against the conservation objectives of Natura 2000 sites and to ascertain whether that project would adversely affect the protection or integrity of such a site. Guidance from the European Commission (EC, 2000, 2001) has been referred to in this assessment. In summary the HRA may include the following steps, the need for each being dependent upon the outcomes of the preceding stage:

- Stage 1 – Screening; - Stage 2 – Appropriate Assessment; - Stage 3 – Assessment of alternative solutions; - Stage 4 – Consideration of imperative reasons of overriding public interest; and, - Stage 5 – Consideration of compensatory measures.

Details of the procedure followed during the process are provided in Chapter 2: Screening Assessment Methodology (The Likely Significance Test).

Stage 1 of the process is intended to identify whether the project will have a ‘likely significant effect’ upon a European site, and is referred to as ‘screening’. If the screening process identifies the potential for significant adverse impacts on Natura 2000 sites, Stage 2 of the HRA needs to be completed. Stage 2 further assesses the project, including any mitigation measures to be employed to remove or reduce potential effects. If an adverse impact upon the sites integrity cannot be ruled out, then Stage 3 will need to be undertaken to assess whether alternative solutions exist. If no alternatives exist that will not have adverse impacts on the integrity of the Natura 2000 site/s in question, the project can only be implemented if there are ‘imperative reasons of overriding public interest’, as detailed in Article 6(4). The HRA process is applicable only to the assessment of effects on European conservation sites, their designation features and conservation objectives. This assessment does not therefore address effects on the Afon Cleddau Dwyreiniol/Eastern Cleddau River SSSI, although the boundaries of the SAC and SSSI coincide, and their designation features and conservation objectives are clearly complementary. Stage 1 of the HRA is presented in this report.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 3

Capabilities on project: Environment

2 Screening Assessment Methodology (The Likely Significance Test)

2.1 Introduction The principle aim of this chapter is to detail the methodology utilised to identify whether the proposed development is likely to result in a Likely Significant Effect upon Natura 2000 sites identified in Chapter 3 of this report. A precautionary approach is taken when insufficient information is available to make a judgment, by assuming that a significant effect is possible. 2.2 Methodology Overview The screening assessment comprises the following steps and concludes whether options should proceed to the next stage of the HRA assessment; - Identifying Natura 2000 sites that lie within and up to 30km from the boundary (see section 3.1 for a rationale on distance used for this assessment) of the proposed development that may be affected by the proposed development; - Confirming the Qualifying Features and the conservation objectives for these Natura 2000 sites; - Collate information on other plans and projects that may have “in combination effects”. In-combination effects refers to the cumulative effects as a result of the proposed development together with other existing or proposed projects or plans; - Identify the broad elements of the proposed development that may interact with Natura 2000 sites alone or in-combination with other projects or plans; - Identifying the potential effects and ascertaining whether the Natura 2000 sites are at risk of Likely Significant Effects from the proposed development; - Identify avoidance, cancellation, and reduction measures which may be implemented to avoid significant effects; and, - Options where significant effects cannot be mitigated against using best practice measures either alone or in-combination with other projects or plans should proceed to the Stage Two: Appropriate Assessment.

2.3 Detailed Description of Screening Assessment A preliminary screening assessment of the proposed development identifies the potential effects against Qualifying Features. This preliminary screening assessment does not identify a proposal’s proximity to a European Site it simply provides an indication as to whether the proposed development could potentially result in an ecological effect. Options that are identified as having a potential ecological effect are screened to determine whether they are likely to result in a likely significant effect upon a European Site. Appendix C detail the Qualifying Features present at each site, the conservation objectives and potential vulnerabilities. Where appropriate the implementation of avoidance, cancellation and reduction measures (best practice measures) will be considered in the screening assessment to reduce the potential for LSE’s. Should any of the options have the potential to result in LSE’s even with best practice measures in place then the proposals will proceed to Stage Two: Appropriate Assessment to ascertain whether the options will result in adverse effects upon site integrity.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 4

Capabilities on project: Environment

3 Identification of Natura 2000 Sites

3.1 Introduction Potential impacts on Natura 2000 sites are not constrained by the distance of a proposed scheme from a designated site. Sites that are assessed are those which may have potential to be significantly affected by the proposed scheme. Distance from a site is therefore less important than the existence of effect pathways which may link a development with a Natura 2000 site. Examples include: watercourse SACs which are hydrologically linked to a proposed scheme, and that may therefore be effected for a considerable distance downstream by, for example, pollutants that are introduced into the headwaters of a catchment; and SPAs that are the source of birds that may disperse over an extensive area of the wider countryside. Sites within a nominal 30km of the proposed development have been assessed for their potential to be affected by the proposed development. No sites outside of this distance have been identified that have feasible pathways for effects from the scheme. The proposed scheme lies within the boundary of a Natura 2000 site, the Afonydd Cleddau/Cleaddau Rivers SAC. The location, size and characteristics of the proposed development as well as the characteristics of the potential receptors (designation features) must be taken into account when determining whether there is a potential for likely significant effects to occur with respect to Natura 2000 sites. The characteristics of the Natura 2000 sites that have been considered for potential impacts are listed in Table 3.1. 3.2 List of Natura 2000 Sites A total of 3 Natura 2000 sites have been identified within a 30km radius. The results are shown in Table 3.1.

Table 3.1: Natura 2000 sites within 30km of the Proposed Development

Site Location Designation features

Afonydd Cleddau/Cleddau Rivers SM 938249; Surrounds and includes Annex I habitats present as a qualifying feature, SAC proposed development site. but not a primary reason for selection of this site: Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation; Active raised bogs; Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae).

Annex II species that are a primary reason for selection of this site Brook lamprey Lampetra planeri; River lamprey Lampetra fluviatilis; Bullhead Cottus gobio; Otter Lutra lutra.

Annex II species present as a qualifying feature, but not a primary reason for site selection: Sea lamprey Petromyzon marinus

Yerbeston Tops SAC SN057099; 15.6km to south Annex I habitats present as a qualifying feature,

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 5

Capabilities on project: Environment

Table 3.1: Natura 2000 sites within 30km of the Proposed Development

Site Location Designation features

but not a primary reason for selection of this site: Molinia meadows on calcareous, peaty or clayey- silt-laden soils (Molinion caeruleae

Annex II species that are a primary reason for selection of this site: Marsh fritillary butterfly Euphydryas (Eurodryas, Hypodryas) aurinia

North West Pembrokeshire SM 776273; 24.6km to west Annex I habitats that are a primary reason for Commons/ Comins Gogledd selection of this site: Orllewin Sir Benfro SAC European dry heaths; Transition mires and quaking bogs. Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site: Northern Atlantic wet heaths with Erica tetralix; Molinia meadows on calcareous, peaty or clayey- silt-laden soils (Molinion caeruleae).

Annex II species that are a primary reason for selection of this site: Floating water-plantain Luronium natans

3.3 Conservation Objectives The conservation objectives of Afonydd Cleddau/Cleddau Rivers SAC are included in Appendix C. 3.4 Scoping Out The characteristics of the scheme and of the designation features of the Yerbeston Tops and North West Pembrokeshire Commons/ Comins Gogledd Orllewin Sir Benfro SACs, in particular their distance from the reservoir site, indicate that there are no feasible pathways that would give rise to likely significant effects at these sites. 3.5 Scoping In The location of the proposed development within the boundary of the Afonydd Cleddau/Cleddau Rivers SAC indicates that the development should be assessed for potential significant effects from the scheme. 3.6 Sites Assessed The following Natura 2000 site will be assessed to ascertain if there are any potential effects on the Natura 2000 sites or their Qualifying Features as a result of the proposed development, during operation:

- Afonydd Cleddau/Cleddau Rivers SAC

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 6

Capabilities on project: Environment

4 Assessment and Assumptions

4.1 Assessment of Likelihood and Significance of Effects The assessment of significance should be made in relation to the specific features and environmental conditions of the site concerned, taking particular account of its conservation objectives (EC 2000). There is no one measure of significance, but the EC guidance suggests the use of the likelihood of changes to relevant indicators to establish changes in these conservation objectives. The indicators of most relevance to the watercourse SACs would be changes in the distribution or density of selection features, including habitats, otter and fish.

For the assessment of significance of potential impacts upon the conservation objectives of a site, the following should be considered:

- Disturbance to qualifying species; - Long-term maintenance of the:

o Populations of qualifying species as a viable component of the site; o Distribution of qualifying species within the site; o Distribution and extent of habitats supporting qualifying species; and, o Structure, function and supporting processes of habitats supporting qualifying species.

- Disturbance to species typical of the qualifying habitat; and, - Long-term maintenance of the:

o Extent of the qualifying habitat within the site; o Distribution of the qualifying habitat within the site; o Structure and function of the qualifying habitat; o Processes supporting the qualifying habitat; o Distribution of typical species of the habitat; and, o Viability of typical species as components of the qualifying habitat.

A plan or project may be consented by the competent authority, even if it has negative effects on a Natura 2000 site, only if there are no satisfactory alternatives to the project, and the reason for the project is considered to be an Imperative Reason of Overriding Public Interest.

4.2 Data Review and Consultation The following statutory bodies have been approached for comment, and the information provided has been used to inform the assessment:

- Natural Resources Wales (NRW).

The following data have been reviewed to provide background and relevant information:

- Countryside Council for Wales (14 April 2008) Core Management Plan Including Conservation Objectives For Afonydd Cleddau / Cleddau Rivers SAC; and, - Countryside Council for Wales (2003) Eastern Cleddau River Site of Special Scientific Interest: Operations Requiring Consultation With The Countryside Council For Wales (CCW); and - West Wales Biodiversity Information Centre – species data within 1km radius of the proposed development.

Further consultation with NRW will take place following submission of this Draft Screening Assessment.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 7

Capabilities on project: Environment

4.3 Alone and In Combination The assessment requires that any other existing or proposed plans that may affect protected sites as a result of ‘in combination’ effects with the proposed development are considered. However, it is considered that the scale of the project, the limited potential for effects of the scheme on Natura designation features, and the likely containment of potential effects within the proposed development site indicate that there are unlikely to be in combination effects arising from the scheme.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 8

Capabilities on project: Environment

5 Screening Assessment – The Likely Significance Test

5.1 Overview Three Natura 2000 sites were identified within 30km of the proposed development (see Table 3.1). Two Natura 2000 sites were scoped out of the assessment because they do not have designation features which could be impacted by the proposed development, and/or their location and absence of effect-pathways will result in no LSE. LSEs on the Afonydd Cleddau/Cleddau Rivers SAC arise from potential pollution linkages between the site and potential pollution runoff from the construction area and the operational site, and from alteration of the flow characteristics of the Afon Syfynwy during turbine operation.

The Natura 2000 site which will be subject to assessment is Afonydd Cleddau/Cleddau Rivers SAC. 5.2 Afonydd Cleddau/Cleddau Rivers SAC 5.2.1 Introduction The following sections outline the potential impacts that could result in a LSE to the Natura 2000 site. 5.2.2 Effect Pathways Habitat Loss Loss can occur directly, either for qualifying habitat or for habitat important to qualifying species, or indirectly through pollution or sediment deposition carried in watercourses. Pollutants There are three main effect pathways which could transport pollutant impacts to the SAC. These are direct input into the SAC watercourse; direct inputs into watercourses linked to SAC watercourses; and indirect input into SAC watercourses across intervening land (either directly into the SAC watercourses, or via tributary watercourses). Flow Characteristics Changes to flow characteristics of the SAC waters could occur as a result of surges during shutdown and variations in the scouring pattern of the stilling pond. Physico-Chemical Characteristics There is a potential for changes to the physico-chemical characteristics of receiving waters as a result of the physical transport of waters through the new turbine and existing and new pipework. Aquatic Species Disturbance could occur to fish and otter qualifying features during construction of the scheme, either through direct disturbance by people and/or plant, temperature changes or by vibration from plant activities in proximity to the feature. Invasive Species Land clearance and excavation have the potential to disturb invasive alien plant species and cause their spread into existing semi-natural vegetation. 5.2.3 Potential Impacts Habitat Loss Although the proposed scheme occupies part of the SAC, it is in close proximity to the Llys-y-Frân dam and associated built infrastructure, and it will not occupy or require removal of any of the designation feature habitats of the SAC. Pollutants and Runoff Pollutant inputs arising from accidental fuel and chemical spills have the potential to produce direct fish kills. There is a potential for adverse impacts on water quality arising from construction activities to have consequent impacts on stream flora and fauna. During operation of the turbine, the increased area of hard surfaces has the potential to result in an increase in pollutants derived from vehicles and plant reaching the watercourse in the SAC. There is a potential adverse impact on the ecological features of the Afon Syfynwy through direct toxic effects, indirect impacts on species through food chain disruption and alteration of stream substrate characteristics. Any effects are likely to be short term as physical inputs are rapidly diluted and dispersed as a result of

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 9

Capabilities on project: Environment

the base flow of the river. Inputs from construction activities therefore have the potential to impair the ecological function of the watercourse over a restricted time period. Potential impacts on the SAC derive mainly from the characteristics of actual and potential discharges into the existing stilling pond that may have effects on fish species downstream of the site. Possible impacts on fish species include increases in silt loading in rivers during construction, with a potential for blanketing breeding sites, smothering of prey species and physical impacts on fish through infiltration into their gills. Silt discharges also have a potential to smother aquatic vegetation, including Ranunculion and Callitricho-Batrachion-type communities of the SAC. Flow Characteristics Changes in flow arising from surges in water discharges have the potential to disrupt fish breeding habitats and activities downstream of the new turbine if the stilling pond overflows. It has been established that designated fish species are unlikely to occur in the stilling basin, which is, in any case, subject to drainage during routine maintenance. Physico-Chemical Characteristics Potential effects on the physico-chemical characteristics of the watercourse in the SAC include discharge of intermittently stratified water, with low dissolved Oxygen (DO) levels, as well as compounds of manganese and other metals. Potential effects on fish species include disruption of behaviour due to rapid temperature change, and toxic and sub-toxic effects arising from ingestion of metals. Responses to manganese intake appear to be species-specific, but at some concentrations and pH values it has the potential to affect time to hatching and larval survival in some species Stubblefield et. al. (1997), and to increase physiological stress indicators Wepener, et al (1992). Aquatic Species Construction activities have the potential to disturb otters and fish, preventing their use of habitats in the vicinity of the works. Poor water quality and increased sedimentation can be significant influences on populations of otter, through effects on prey species. There is the potential for changes in the temperature of the river supporting migratory fish species to be caused by the outflow water being colder/warmer than the river to have an effect on migratory fish. Invasive Species It is likely that a stand of Japanese knotweed will be disturbed, with a potential for spread into adjacent habitats, and into more distant habitats via the Afon Syfynwy. 5.3 Screening Matrices The findings of the Stage 1 Screening Assessment for the proposed development are reported using the adapted templates provided in ‘Assessment of plans and proposed developments significantly affecting Natura 2000 sites. Methodological guidance on the provisions of Article 6(3) and (4) of the Habitats Directive 92/43/EEC, Brussels, November 2001’. The Screening Matrices table (Table 7.1 and Table 7.2) are contained within Section 7 and these form the basis for the rationale behind the assessment of LSE’s. 5.4 Standard Impact Avoidance and Mitigation Measures Measures designed to avoid adverse environmental impacts that are included in a development scheme and are generally applied as a matter of good practice are accepted as an integral part of the scheme. As such the inclusion of these measures in a scheme does not trigger a Stage 2 Appropriate Assessment, which would otherwise be the case if scheme-specific, non- standard, mitigation has to be designed into a project. Avoidance of adverse impacts on the designation features of the SAC is the primary means of assuring that potential LSEs are not experienced. The potential to alter key characteristics of the water discharged post-generation was recognised at an early stage. However, these issues were all based on taking flows to the turbine directly from the scour pipe. The current proposal is to take flow from the main reservoir drawdown tower (for avoidance of doubt the reservoir scour is not used for any part of the

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 10

Capabilities on project: Environment

scheme). As this main is currently operated for compensation flows it is considered that this will mitigate against all of the identified issues. Further consultation with the Environment Agency will be required as part of any detailed design. The main means of ensuring no Likely Significant Effect is the production of a Construction Management Plan (CMP) to which the contractor will adhere. The CMP will require construction in accordance with best practice, as contained in various publications, including:

rd - CIRIA Report 650 (2010) Environmental Good Practice on site (3 Edition); - Technical Advice Note (Wales) TAN 21: Waste (2001); - PPG 1: Pollution Prevention Guidelines (July 2013); - PPG 2 – Above Ground Oil Storage Tanks (February 2004); - PPG 3 – Use and Design of Oil Separators in Surface Water Drainage Systems (April 2006); - PPG 5 – Works or Maintenance In or Near Watercourses (October 2007); - PPG 7 – The Safe Operation of Refuelling Facilities (July 2011); - PPG 18 – Managing Fire Water and Major Spillages (June 2008); and, - PPG 21 – Pollution Incidence Response Planning (March 2009).

Appropriate consents will be required for works affecting watercourses and construction work will need to comply with any conditions imposed. Applications for appropriate permits will be made following detailed design. All consents, permits and licences will be in place prior to commencement of any works.

The mitigation measures that will be adopted in the CMP to control silt-laden runoff and spillages are described below. The Contractor will:

- Programme and manage construction activities to prevent sediment generation; - Protect water bodies from sediment pollution by preventing silt-laden runoff reaching watercourses; and, - Propose adequate measures to treat runoff prior to discharge.

Existing vegetation will be retained where possible as mature vegetation holds the soil and prevents soil erosion. Areas where vegetation clearance is required will be kept to a minimum, with seeding and planting as soon as possible after completion of the works. This will minimise the areas of exposed soil and thus the risk of erosion. Site compounds and stockpiles will be kept to a minimum and will be located well away from any watercourses. To minimise the loss of sediment from stockpiles they will be located away from watercourses, to minimise the amount of silt-laden runoff available as a result of rainfall events.

The storage and use of potentially polluting chemical substances, including fuel and other oils will be in accordance with good practice guidance listed earlier and will include as a minimum the following measures:

- Fuel and other potentially polluting chemicals will be stored in the Construction Compound well away from any watercourses in a secure impermeable and bunded storage area (minimum capacity 110%); - Refuelling of plant and maintenance of vehicles and equipment will take place in a designated area at the site compound only (> 50 m away from any watercourse); - Fixed plant and all storage tanks will be self bunded; - Mobile plant will be in good working order, kept clean and fitted with drip trays where appropriate; - A Pollution Prevention Plan will be prepared and construction workers trained to respond to spillages. This will describe measures to prevent pollution and the procedures in the event of an environmental emergency occurring, such as a spillage. - Spillage kits and oil absorbent material will be carried by mobile plant and located at vulnerable locations (e.g. crossings of land drains and ditches); - Designated concrete wash out areas (with containment for tinkering away) will not be constructed near watercourses (> 50 m away) in accordance with good practice guidance and will be clearly identified and used;

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 11

Capabilities on project: Environment

- Boot/wheel wash facilities will be available with water collected and treated prior to consented discharge; - Stockpiles of fill material will be kept to a minimum size, well away from any watercourse, bunded or seeded with grass as required (>50 m away); - Runoff from machine wash / service areas, construction waste / debris will be prevented from entering any water body; and, - The site will be secured to prevent vandalism.

Any removal of Japanese knotweed will be carried out using a recognised best practice method(s). The method(s) used will be determined depending on site characteristics, but may comprise:

- Treatment with an approved herbicide over an appropriate number of growing seasons; - Burial on site using an approved containment method; or - Treated as controlled waste and transported by a registered waste carrier to a licensed landfill site.

If development is required or management or maintenance works are required within an area of invasive plant growth. A plan for its removal must be drafted and implemented prior to any soil disturbing works commencing. This will control and mitigate the spread of the plant. Environment Agency (2010) and (2006) Guidance on managing invasive species will be followed. Measures taken should include:

- Avoid tracking vehicles (including mowers) and/or people walking over areas of invasive plants. - Do not dispose of invasive plant remains in main stream waste. All waste containing Japanese Knotweed comes under the control of Part II of the Environmental Protection Act 1990. Environment Agency (2010) and (2006). - All knotweed to be disposed of will be kept on site, and guarded against spreading by the use of barriers and site hygiene measures, unless and until the waste is taken off-site for licensed disposal. - Japanese knotweed removal must be conducted by a licensed operative. Once removed, the Japanese knotweed plant material and contaminated soil must be transported and disposed of by licensed contractors at a licensed waste disposal site. - Landscaping contractors and maintenance personnel should be made aware of the presence of invasive plants on site and should be able to identify the plant before commencing any works.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 12

Capabilities on project: Environment

6 References

EC 2000. Managing Natura 2000 sites: The provisions of Article 6 of the ‘Habitats’ Directive 92/43/EEC. European Commission, Luxembourg: Office for Official Publications of the European Communities EC 2001. Assessment of plans and projects significantly affecting Natura 2000 sites. Methodological guidance on the provisions of Article 6(3) and (4) of the Habitats Directive 92/43/EEC. European Commission, Luxembourg JNCC 2010. Handbook for Phase 1 habitat survey. A technique for environmental audit. Joint Nature Conservation Committee Peterborough Stubblefield, William A., S.F. Brinkman, P.H. Davies, T.D. Garrison, J.R. Hockett and MW. McIntrye, 1997. Effects Of Water Hardness On The Toxicity Of Manganese To Developing Brown Trout (Salmo trutta), Environmental Toxicology and Chemistry, Vol. 16, No. 10, pp. 2082-2089. Wepener,V. J.H.J. Van Vuren and H.H. DuPreez, 1992. Effect of Manganese and Iron at a Neutral and Acidic pH on the Hematology of the Banded Tilapia (Tilapia sparrmanii), Bulletin of Environmental Contamination and Toxicology, Vol. 49, No. 4, pp. 613-619.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 13

Capabilities on project: Environment

7 Screening Matrices

The findings of the Stage 1 Screening Assessment for the proposed development are reported using the adapted templates provided in ‘Assessment of plans and proposed developments significantly affecting Natura 2000 sites. Methodological guidance on the provisions of Article 6(3) and (4) of the Habitats Directive 92/43/EEC, Brussels, November 2001’. The following tables present the Stage 1 Screening Matrices:

- Table 7.1 – Habitats Directive Screening Matrix: Afonydd Cleddau/Cleddau Rivers SAC - Table 7.2 – Afonydd Cleddau/Cleddau Rivers SAC Finding of no significant effects report

Table 7.1: Habitats Directive Screening Matrix: Afonydd Cleddau/Cleddau Rivers SAC Screening matrix for provision of hydroelectric turbine at Llys-y-Frân Reservoir, Pembrokeshire Brief description of the project AMCO on behalf of Dŵr Cymru Welsh Water (DCWW) propose to install a new hydropower turbine at Llys-y-Frân reservoir, Pembrokeshire. The proposed development seeks to take advantage of the energy available in the existing outlet discharge from the reservoir by connecting a new transfer pipe from one or both of the existing outlet pipes to a new hydroelectric turbine located in a new turbine house. The water from the turbine house will then discharge into the existing stilling basin via a discharge chamber and the power generated would be fed to a new standalone transformer building. Excavations for cabling (c 30m) will be in hardstanding with perennial species, scrub and bare ground habitats. The development will be located immediately downstream of the Llys-y-Frân Reservoir spillway within the existing DCWW site. Brief description of the Natura 2000 site This site is of European importance because of its population of fish species, including migratory species such as sea and river lamprey, and resident species such as brook lamprey and bullhead. The abundance of fish and widespread availability of undisturbed resting and breeding sites allows a population of otter to thrive. There is a range of river habitats including floodplain woodland, and beds of submerged aquatic plants often dominated by water-crowfoot. Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site:

Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation;

Active raised bogs; Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion, Alnion incanae, Salicion albae). Annex II species that are a primary reason for selection of this site

Brook lamprey Lampetra planeri; River lamprey Lampetra fluviatilis;

Bullhead Cottus gobio; Otter Lutra lutra.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 14

Capabilities on project: Environment

Annex II species present as a qualifying feature, but not a primary reason for site selection:

Sea lamprey Petromyzon marinus Assessment criteria Describe the individual elements of the project (either alone The elements of the proposed scheme that could give rise to or in combination with other plans or projects) likely to give impacts are: rise to impacts on the Natura 2000 site. Construction phase: - Discharge of pollutants into the Afon Syfynwy have the potential to affect vegetation, otters and fish species via water quality impacts; - Disturbance of otters and fish species; and - Disturbance of Japanese knotweed.

Operational phase: - Runoff from scheme drainage with potential toxic effects; - Changes to flow regime due to surge events; - Changes to the physico-chemical characteristics of the SAC river.

Other plans in the general area will not have in combination effects. It is considered that the scale of the project, the limited potential for effects of the scheme on Natura designation features, and the likely containment of potential effects within the proposed development site indicate that there are unlikely to be in combination effects arising from the scheme Describe any likely direct, Size and scale There are no likely impacts on the Natura site arising from the indirect or secondary impacts size or scale of the scheme. of the project (either alone or in combination with other plans or projects) on the Natura 2000 site by virtue of: Land-take The development red line encloses c.0.56ha within the SAC boundary, of which c.0..5ha comprises the existing stilling basin and hardstanding, which will continue to function as at present

Distance from the Natura The development is within the SAC boundary. 2000 or key features of the site The red line approaches the SAC river (downstream of the stilling basin) at c.7m – brook lamprey is a key species throughout the Eastern Cleddau river system. Otter is a key species (as defined in Site Conservation Objectives) that is present throughout the SAC river system. Ranunculion vegetation is present as a key habitat within the immediate management unit (MU) of the A. Syfynwy. Alluvial forest and raised bog are absent from the MU. Sea and river lampreys, and bullhead are not key species in the MU.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 15

Capabilities on project: Environment

Resource requirements There will be no requirement for abstraction of resources that (water abstraction etc) are of significance for the SAC. Turbine water will be returned to the stilling basin. An area of scrub (non-designation) habitat will be cleared from the site.

Emissions (disposal to land, Turbine water will be returned to the SAC waters. Runoff from water or air) hard surfaces will go into the existing drainage system. During construction works contaminated discharges shall be controlled in accordance with the NRW pollution prevention guidelines No. 5 and No. 6. No sediment will be generated during operation. Excavated materials will either be used on site or will be transferred to a licensed landfill site by licensed carrier. Construction materials will be used on site and any excess materials will be transferred offsite. Excavation Requirements The scheme will require the disposal of excavated material from the excavations for the development structures and transmission cables. Where possible, excavated material will be re-used on site for landscaping. Any excavated material that cannot be re-used on site will be taken to an authorised landfill site and disposal will be as required by the current regulations. Transportation requirements; Access to the site for plant will be from the established rural duration of construction, and site road network. Construction of the scheme is likely to operation, decommissioning, be completed within one year. It is not envisioned that the etc. plant will be decommissioned, although upgrading may take place in the future.

Other Avoidance or removal and disposal of Japanese knotweed will take place according to best practice and there will be no adverse impacts on designation habitats or species as a result of this action.

Describe any likely changes Reduction of habitat area No loss of designation feature habitat in the SAC will occur. to the site arising as a result of:

Disturbance to key species There is a limited potential for noise and vibration during construction to disturb brook lamprey and bullhead in the adjacent stream. Sea and river lamprey are likely to be less frequent in the vicinity, and there will be a negligible potential for disturbance of these species. Construction activities are likely to limit the local diurnal range of individual otters over a short timescale. There will be no change in the temperature to the outflow water into the river supporting Annex II fish species to that currently discharged. Habitat or species There is no potential for fragmentation of designation feature fragmentation habitats or species.

Reduction in species density There will be no effects on species density of designation species within the SAC arising from the project.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 16

Capabilities on project: Environment

Changes in key indicators of There will be no impact on water quality as a result of the conservation value (water development. quality etc.) Climate change The scheme will contribute to electricity generation from renewable sources, and will thus have a positive, but imperceptible impact on climate change. Describe any likely impacts Interference with the key There is no potential for fragmentation of otter and fish habitat on the Natura 2000- site as a relationships that define the or population structure. There will no effects on habitats that whole in terms of: structure of the site are designation features and which include vegetation communities that support species designation features.

Interference with key There will be no impacts on river characteristics, and the relationships that define the function of the site will remain as at present. function of the site

Provide indicators of Loss There will be no loss of designation habitat or species arising significance as a result of the from the development. identification of effects set out above in terms of: Fragmentation There will be no habitat fragmentation since the designation habitats will not be affected, and the waters that support species designation features will retain their present flow and physic-chemical characteristics. Disruption There may be short-term disruption of otter behaviour, principally as a result of disturbance at a very local scale during construction as a result of the development.

Disturbance There is the potential for short-term and local disturbance of otter as a result of the development

Change to key elements of There will be no changes to any key elements of the site as a the site (e.g. water quality result of the development. etc.).

Describe from the above those elements of the project or Scale, intensity and duration indicate that disruption and plan, or combination of elements, where the above impacts disturbance are not likely to be significant in their effects at an are likely to be significant or where the scale or magnitude of individual or population scale. impacts is not known.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 17

Capabilities on project: Environment

Table 7.2: Finding of No Significant Effects Report Name of project or plan Provision of hydroelectric turbine at Llys-y-Frân Reservoir, Pembrokeshire Name and location of Natura 2000 site Afonydd Cleddau/Cleddau Rivers SAC, Pembrokeshire. Description of the project or plan Provision of a new hydropower turbine at Llys-y-Frân reservoir, Pembrokeshire. The proposed development seeks to take advantage of the energy available in the existing outlet discharge from the reservoir by connecting a new transfer pipe from one or both of the existing outlet pipes to a new hydroelectric turbine located in a new turbine house. The water from the turbine house will then discharge into the existing stilling basin via a discharge chamber and the power generated would be fed to a new standalone transformer building. Excavations for cabling (c 30m length) will be in hardstanding with perennial species, scrub and bare ground habitats. The development will be located immediately downstream of the Llys-y-Frân Reservoir spillway within the existing DCWW site. Is the project or plan directly connected No. with or necessary to the management of the site (provide details)? Are there other projects or plans that No. The self-contained nature of the scheme, with any potential effects restricted to together with the project or plan being the development site, and no likely effects on SAC designation features, indicate that assessed could affect the site (provide there is no potential for in-combination effects. details)? The assessment of significance of effects Describe how the project or plan (alone The elements of the proposed scheme that could give rise to impacts are: or in combination) is likely to affect the  Construction phase – there will be potential for disturbance of otters and Natura 2000 site. for disruption of otter diurnal range;  Discharge of pollutants has the potential for adverse effects on SAC river waters, habitats and species; and,  Operational phase – runoff from scheme drainage has the potential for adverse effects on SAC river waters, habitats and species`. Explain why these effects are not  Construction phase – Scale, intensity and duration indicate that disruption considered significant. and disturbance are not likely to be significant in their effects at an individual or population scale.  Adherence to good working practice, as required by a site Construction Management Plan, will ensure that any pollutants present will be contained, with no potential to reach the SAC waters. And  Operational phase – Roof drainage only, no pollutants used during operation.. List of agencies consulted. Environment Agency Wales (EAW); Natural Resources Wales (NRW) Pembrokeshire County Council Response to consultation. EAW raised environmental issues concerned with the quality of discharge waters. NRW provided list of operations likely to damage the SSSI. Pembrokeshire CC noted the proximity to the SSSI and SAC and the need for an ecology report. Data collected to carry out the assessment Who carried out the Sources of data Level of assessment Where can the full results of assessment? completed the assessment be accessed and viewed? NRW website –SAC and Screening This document constitutes SSSI conservation the full screening AECOM objectives assessment. West Wales Biodiversity

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 18

Capabilities on project: Environment

Information Centre – species data Overall conclusions There will be no likely significant effects on the designation features or conservation objectives of the Afonydd Cleddau/Cleddau Rivers SAC arising from the proposed installation of a new hydroelectric turbine and associated infrastructure at Llys-y-Frân Reservoir, Pembrokeshire.

AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 19

Capabilities on project: Environment

Appendix A: Figures

- Figure 1 – Site Location - Figure 2 - Indicative Development Area - Figure 3 – Designated Sites - Figure 4 – Phase 1 Habitat Map

This document has been prepared by AECOM for the sole use of our Client (the "Client") and in accordance with generally accepted consultancy principles, the budget for fees and terms of reference agreed between AECOM and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM.

180000 190000 200000 210000 220000 Ü 0 0 0 0 3 2

(! 0 0 0 0 2 2

Legend 0

0 (! Site Location 0 0

1 0 3,000 Metres 2

Client: Title: Drawn: GM/CC Checked: CC AMCO ENERGY FIGURE 1 Verified: RD Approved: CM SITE LOCATION Project: 1 Callaghan Square Tel +44 (0) 292 067 4600 Date: 05/03/2014 Scale at A3: 1:125,000 LLYS Y FRÂN Cardiff Fax +44 (0) 292 067 4699 CF10 5BT www.aecom.com SAP Reference: Document Name: FIGURE 1 - Site Location A3 Ordanace Survey Base Mapping Supplied by Welsh Assembley Govenment. Path: P:\UKCDF1-IE\Projects\!GIS Management\Gerwyn Projects\Projects\2014\Llys Y Fran\G2.ArcGIS\ArcMap\FIGURE 1 - Site Location.mxd This document has been prepared by AECOM for the sole use of our Client (the "Client") and in accordance with generally accepted consultancy principles, the budget for fees and terms of reference agreed between AECOM and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM.

203500 204000 0 0

5 Ü 4 2 2 0 0 0 4 2

2 Legend Indicative Development Area

0 50 Metres

Client: Title: Drawn: GM/CC Checked: CC AMCO ENERGY FIGURE 2 Verified: RD Approved: CM INDICATIVE DEVELOPMENT AREA Project: 1 Callaghan Square Tel +44 (0) 292 067 4600 Date: 05/03/2014 Scale at A3: 1:2,500 LLYS Y FRÂN Cardiff Fax +44 (0) 292 067 4699 CF10 5BT www.aecom.com SAP Reference: Document Name: FIGURE 2 - Site Boundary A3 Reproduced from Ordanance Survey digital map data © Crown copyright 2008. All rights reserved. Licence number 0100031673 Path: P:\UKCDF1-IE\Projects\!GIS Management\Gerwyn Projects\Projects\2014\Llys Y Fran\G2.ArcGIS\ArcMap\FIGURE 2 - Site Boundary.mxd This document has been prepared by AECOM for the sole use of our Client (the "Client") and in accordance with generally accepted consultancy principles, the budget for fees and terms of reference agreed between AECOM and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM.

202500 205000 207500 Ü

^_ ^_

^_

0 ^_^_ 0 ^_ 0 5 2 2

^_ ^_

^_

^_

^_ ^_ ^_ Legend 0 0

5 _^ Listed Building Woodland 2 2

2 Indicative Development Area Site of Special Scientific Interest Study Area (2km) Special Area of Conservation Scheduled Monument Surface Water ^_^_^_^_^_ National Park Flood Zone 2 Ancient Woodland Flood Zone 3

0 500 Metres

Client: Title: Drawn: GM/CC Checked: CC AMCO ENERGY FIGURE 3 Verified: RD Approved: CM DESIGNATED SITES Project: 1 Callaghan Square Tel +44 (0) 292 067 4600 Date: 05/03/2014 Scale at A3: 1:20,000 LLYS Y FRÂN Cardiff Fax +44 (0) 292 067 4699 CF10 5BT www.aecom.com SAP Reference: Document Name: FIGURE 5 - Constraints - Copy A3 Reproduced from Ordanance Survey digital map data © Crown copyright 2008. All rights reserved. Licence number 0100031673 Path: P:\UKCDF1-IE\Projects\!GIS Management\Gerwyn Projects\Projects\2014\Llys Y Fran\G2.ArcGIS\ArcMap\FIGURE 5 - Constraints - Copy.mxd This document has been prepared by AECOM for the sole use of our Client (the "Client") and in accordance with generally accepted consultancy principles, the budget for fees and terms of reference agreed between AECOM and the Client. Any information provided by third parties and referred to herein has not been checked or verified by AECOM, unless otherwise expressly stated in the document. No third party may rely upon this document without the prior and express written agreement of AECOM.

203600 203700 203800 203900 Ü

ry on Valve Tower as g m pin Slo

)

m

u

(

h

t

a

P 0 0 3

4 1

2 ry 2 on as ) g m pin Slo

2 *# 3 ! ! ! ! ! 1! ! ! ! ! ! ! ! ! ! ! )! ! ! !.! ! 1 ! ! ! ! 2! ! ! *# ry ! ! ! ! ! ! ! ! on 5. 2 as ! ! ! ! ! ! ! ! ! ! ! ! S!I ! S!I m 1 ! ing ! ! ! ! ! ! ! )! ! ! ! !))! ! ! lop Stilling Basin S ! ! ! ! ! ! ! ! ! ! ! ! S!I ! S!I ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! Filter Bed 3 ! ! ! ! ! ! ! !. ! ! ! ! S!I ! S!I ! ! ! ! ! ! ! ! ! ! ! ! ! ! !2 ! ! ! ! ! ! ! ! ! ! ! ! S!I !)S!I ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! S!I ! S!I ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! S!I ! S!I )4 Legend . Target Notes

0 !

0 Trees 2 4

2 Photographs

2 ) ) Invasive Species *# Catagory 3 - Negligible *# Catagory 2 - Low Potential

Dense/Continuous scrub St Meilyrs SI SI SSI emi-improved - neutral grasCshlaurncdh A f o n SI SI SSI tanding water

S y f n Buildings i ! ! ! ! Bare ground (hard standing) ! ! ! ! Pond Indicative Development Area

0 50 Metres

Client: Title: Drawn: GM Checked: CC AMCO ENERGY FIGURE 4 Verified: RD Approved: CM Project: LLYS Y FRAN PHASE 1 HABITAT MAP 1 Callaghan Square Tel +44 (0) 292 067 4600 Date: 02/09/2014 Scale at A3: 1:1,000 LLYS Y FRÂN Cardiff Fax +44 (0) 292 067 4699 CF10 5BT www.aecom.com Drawing Reference: LLYS Y FRAN - Phase 1 Habitats A3 Reproduced from Ordanance Survey digital map data © Crown copyright 2008. All rights reserved. Licence number 0100031673 Path: P:\UKCDF1-IE\Projects\Environmental\Jobs - Potential\2013\2013 Q3\DCWW Llys Y Fran\GIS\G2.ArcGIS\ArcMap\LLYS Y FRAN - Phase 1 Habitats.mxd AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 20

Capabilities on project: Environment

Appendix B: Projected Site Layout Figure

DAM WALL

SPILLWAY

JAPANESE KNOT WEED LOCATION 1

MH

CONTROL HOUSE

MH

STILLING BASIN

MH MH 69.26 62.95 69.26 67.45

69.06 TRANSFORMER ASPHALT ROAD HOUSE

69.16 69.19 STONE PITCHING

SEPTIC TANK

NEW TURBINE HOUSE PROPOSED BURIED CABLE ROUTE 69.13 69.10

62.96 65.18

MH DENSE VEGETATION 64.78 STONE PITCHING ASPHALT ROAD

JAPANESE KNOT WEED LOCATION 2

67.04

SCALE GENERAL NOTES - UNLESS OTHERWISE STATED DO NOT SCALE - IF IN DOUBT ASK REV REVISIONS REV. BY CHECK DATE REFERENCE DRAWINGS 1:200

DRAWN JF A REVIEW JF CHE ??.03.14 Energy DATE MAR '14 à B CHECKED CHE PROJECT: DWR CYMRU WELSH WATER HYDROS - LLYS Y FRAN PLANNING APPLICATION DATE C MAR '14 SITE PLAN APPROVED PJ

TENDER / D DATE MAR '14 CONTRACT No. 60267869 DRG. No. 032-02 REV. A A1-CAD AECOM Llys Y Frân Reservoir Proposed Hydroelectric Turbine Installation Habitat Regulations Assessment Stage 1 Screening Report 21

Capabilities on project: Environment

Appendix C: Natura 2000 Site Conservation Objectives

CYNGOR CEFN GWLAD CYMRU COUNTRYSIDE COUNCIL FOR WALES

CORE MANAGEMENT PLAN INCLUDING CONSERVATION OBJECTIVES

FOR

AFONYDD CLEDDAU / CLEDDAU RIVERS SAC (SPECIAL AREA OF CONSERVATION)

Version: 8 (Minor map edit, August 2012)

Date: 14 April 2008

Approved by: Tracey Lovering

A Welsh version of all or part of this document can be made available on request. More detailed maps of management units can be provided on request.

CONTENTS

Preface: Purpose of this document

1. Vision for the Site

2. Site Description 2.1 Area and Designations Covered by this Plan 2.2 Outline Description 2.3 Outline of Past and Current Management 2.4 Management Units

3. The Special Features 3.1 Confirmation of Special Features 3.2 Special Features and Management Units

4. Conservation Objectives Background to Conservation Objectives 4.1 Conservation Objective for the watercourse 4.2 Conservation Objective for Feature 1: Sea lamprey 4.3 Conservation Objective for Feature 2: Brook lamprey 4.4 Conservation Objective for Feature 3: River lamprey 4.5 Conservation Objective for Feature 4: Bullhead 4.6 Conservation Objective for Feature 5: European otter 4.7 Conservation Objective for Feature 6: Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation 4.8 Conservation Objective for Feature 7 : Alluvial forests with Alnus glutinosa and Fraxinus excelsior ( Alno-Padion , Alnion incanae , Salicion albae ) 4.9 Conservation Objective for Feature 8: Active Raised Bogs

5. Assessment of Conservation Status and Management Requirements: 5.1 Conservation status and management requirements of Feature 1: Sea lamprey 5.2 Conservation status and management requirements of Feature 2: Brook lamprey 5.3 Conservation status and management requirements of Feature 3: River lamprey 5.4 Conservation status and management requirements of Feature 4: Bullhead 5.5 Conservation status and management requirements of Feature 5: European otter 5.6 Conservation status and management requirements of Feature 6: Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho- Batrachion vegetation 5.7 Conservation status and management requirements of Feature 7: Alluvial forests with Alnus glutinosa and Fraxinus excelsior ( Alno-Padion , Alnion incanae , Salicion albae ) 5.8 Conservation status and management requirements of Feature 8: Active Raised Bogs

6. Action Plan: Summary

7. Glossary

8. References and Annexes

2

PREFACE

This document provides the main elements of CCW’s management plan for the site named. It sets out what needs to be achieved on the site, the results of monitoring and advice on the action required. This document is made available through CCW’s web site and may be revised in response to changing circumstances or new information. This is a technical document that supplements summary information on the web site.

One of the key functions of this document is to provide CCW’s statement of the Conservation Objectives for the relevant Natura 2000 site. This is required to implement the Conservation (Natural Habitats, &c.) Regulations 1994, as amended (Section 4). As a matter of Welsh Assembly Government Policy, the provisions of those regulations are also to be applied to Ramsar sites in Wales.

3

1. VISION FOR THE SITE

This is a descriptive overview of what needs to be achieved for conservation on the site. It brings together and summarises the Conservation Objectives (part 4) into a single, integrated statement about the site.

Our vision for the Afonydd Cleddau SAC will be to maintain, or where necessary restore the river to high ecological status, including its largely unmodified and undisturbed physical character, so that all of its special features will be able to sustain themselves in the long-term as part of a naturally functioning ecosystem. Allowing the natural processes of erosion and deposition to operate without undue interference and maintaining or restoring connectivity maintains the physical river habitat, which forms the foundation for this ecosystem. The quality and quantity of water, including natural flow variability, and the quality of adjacent habitats, will be maintained or restored to a level necessary to maintain the features in favourable condition for the foreseeable future.

The aquatic plant communities that characterise parts of the river will not only be attractive but will also give a good indication of the overall quality of the environment. They will contain the variety and abundance of species expected for this type of river, in conditions of suitably clean water and bed substrate combined with a relatively stable flow regime. Locally, there will be patches of white-flowered water-crowfoots. In the more shaded reaches, aquatic plants may be scarce, consisting mainly of mosses and liverworts.

The special fish species found in the river, both residents such as the bullhead and brook lamprey, and migratory species such as the sea and river lamprey which swim up river to spawn and go through their juvenile stages in the river, will be present in numbers that reflect a healthy and sustainable population supported by well distributed good-quality habitat. The migratory fish will be able to complete their migrations and life cycles largely unhindered by artificial barriers such as weirs, pollution, or depleted flows.

The abundance of prey and widespread availability of undisturbed resting and breeding sites, allows a large otter population to thrive. They will continue to be found along the entire length of the river and its main tributaries.

The presence of the River Cleddau SAC and its special wildlife will enhance the economic and social values of the area, by providing a high quality environment for ecotourism, outdoor activities and peaceful enjoyment by local people and visitors. The river catchment’s functions of controlling flooding and supplying clean water will continue to be recognised and promoted through appropriate land management. The river will be a focus for education to promote increased understanding of its biodiversity and the essential life support functions of its ecosystems.

There will be areas of undisturbed yet naturally dynamic alluvial forests throughout the SAC, providing cover and breeding opportunities for the otter. Areas of lowland raised bog, fen and swamp within the river floodplain and SAC will be maintained and where necessary restored.

4

2. SITE DESCRIPTION

2.1 Area and Designations Covered by this Plan

Grid references: SM 955 155 Haverfordwest town weir (Western Cleddau) SN 060 144 Blackpool Bridge (Eastern Cleddau)

Unitary authorities: Pembrokeshire County Council Pembrokeshire Coast National Park

Area (hectares): 751 ha

Designations covered:

Afon Cleddau Dwyreiniol (Eastern Cleddau River) SSSI Afon Cleddau Gorllewinol (Western Cleddau River) SSSI Esgyrn Bottom SSSI Corsydd Llangloffan SSSI Wallis Moor SSSI Treffgarne Gorge and Tors

Detailed maps of the designated sites are available through CCW’s web site: http://www.ccw.gov.uk/interactive-maps/protected-areas-map.aspx

2.2 Outline Description The River Cleddau is one of the westernmost rivers in Britain and can be broadly divided into the Eastern and Western arms.

A striking feature of this river is that it flows southwards, cutting across the structural orientation in the underlying rocks, which are of Precambrian to Silurian age (650-395 million years ago). In contrast to the orientation of the main channel, its main tributaries follow the orientation of the rocks or are controlled by structural features such as faults and folds.

The catchment is predominantly agricultural land with significant areas of permanent pasture, broadleaved woodland and other semi-natural vegetation. Most of the soils are of clay-rich acidic brown earth type, developed under former and surviving woodland cover, although there are also peaty deposits and peaty soils in some areas.

The Eastern Cleddau River Starting at an altitude of 225m, approximately 1.5km from Mynachlog-ddu and at the foot of the Preseli hills of north Pembrokeshire, the river flows for 26km (74km including tributaries) south to its tidal limit at Blackpool Bridge, where it discharges into the Milford Haven Waterway SAC.

From its source the river flows south, across an ancient valley wetland. The boundary for the upper reach of the Eastern Cleddau River and Afon Wern abuts the Mynydd Preseli SSSI. The gradient of the river increases producing a turbulent flow during its journey south through narrow wooded valleys. In its lower reaches the river meanders through a wide valley floodplain bordered by low bluffs.

5

The tributaries included within the Eastern Cleddau are the Afon Wern, Llanycefn, Rhyd- afallen, Afon Syfynwy, Rhyd-y-Brown Brook, Ty-llosg Brook, Deepford Brook, Cotland Brook, Afon Conin, Pont Shan and Narberth Brook.

The Western Cleddau River The main channel stretches for 30km between its source at Mathry, which lies at an altitude of 112m, to the tidal limit of the Daugleddau Estuary at Haverfordwest, flowing over sands and gravels deposited as the ice sheets from the last glaciation retreated.

In its upper course the river flows over soft substrates, across a marshy valley, bounded by the extensive mire of Corsydd Llangloffan NNR/SSSI. As it enters the wooded valley of Priskilly Forest the gradient of the river increases, and this relatively rapid section continues to Wolf’s Castle and through the gorges at Treffgarne. In its lower reaches the river meanders through a wide valley floodplain bordered by low bluffs, to its tidal limit at Haverfordwest, where the Western Cleddau discharges into the Milford Haven Waterway SAC.

The tributaries included within the Western Cleddau are the Afon Cleddau, Nant-y-bugail, Afon Anghof, Nant-y-coy Brook, Spittal Brook, Rudbaxton Water, Camrose Brook and Cartlett Brook.

At the head of the Afon Cleddau is Esgyrn Bottom SSSI, the best example of a raised bog in the county as well as the most south-westerly example of this habitat in the UK

The ecological structure and functions of the site are dependent on hydrological and geomorphological processes (often referred to as hydromorphological processes), the quality of riparian habitats and connectivity of habitats. Animals that move around and sometimes leave the site, such as migratory fish and otters, may also be affected by factors operating outside the site.

Hydrological processes , in particular river flow (level and variability) and water chemistry, determine a range of habitat factors of critical importance to the SAC features, including current velocity, water depth, wetted area, substrate quality, dissolved oxygen levels and water temperature. Maintenance of both high ‘spate’ flows and base-flows is essential. Reduction in flows may reduce the ability of the adults of migratory fish to reach spawning sites. Water- crowfoot vegetation thrives in relatively stable, moderate flows and clean water. The flow regime should be characteristic of the river in order to support the functioning of the river ecosystem.

Geomorphological processes of erosion by water and subsequent deposition of eroded sediments downstream, create the physical structure of the river habitats. Whilst some sections of the river are naturally stable, processes at the wider catchment scale generally govern processes of erosion and deposition occurring at the reach scale, although locally, factors such as the effect of grazing levels on riparian vegetation structure may contribute to enhanced erosion rates. In general, management that interferes with natural geomorphological processes, for example preventing bank erosion through the use of hard revetments or removing large amounts of gravel, are likely to be damaging to the coherence of the ecosystem structure and functions.

Riparian habitats , including banksides and habitats on adjacent land, are an integral part of the river ecosystem. Diverse and high quality riparian habitats have a vital role in maintaining the SAC features in a favourable condition. The type and condition of riparian vegetation influences shade and water temperature, nutrient run-off from adjacent land, the availability of woody debris to the channel and inputs of leaf litter and invertebrates to support in-steam consumers. Light, temperature and nutrient levels influence in-stream plant production and habitat suitability for the SAC features. Woody debris is very important as it provides refuge

6

areas from predators, traps sediment to create spawning and juvenile habitat and forms the base of an important aquatic food chain. Otters require sufficient undisturbed riparian habitats as breeding and resting sites. It is important that appropriate amounts of tree cover, in general at least 50% high canopy cover, tall vegetation and other semi-natural habitats are maintained on the riverbanks and in adjacent areas, and that they are properly managed to support the SAC features. This may be achieved, for example, through setting up stream-side corridors in appropriate locations, managing grazing levels, selective coppicing of riparian trees and restoring adjacent wetlands.

Habitat connectivity is an important property of river ecosystem structure and function. Many of the fish that spawn in the river are migratory, depending on the maintenance of suitable conditions on their migration routes to allow the adults to reach available spawning habitat and juvenile fish to migrate downstream. For resident species, dispersal to new areas, or the prevention of dispersal causing isolated populations to become genetically distinct, may be important factors. Artificial obstructions including weirs and bridge sills can reduce connectivity for some species. In addition, reaches subject to depleted flow levels, pollution, or disturbance due to noise, vibration or light, can all inhibit the movement of sensitive species. The dispersal of semi-terrestrial species such as the otter can be adversely affected by structures such as bridges under certain flow conditions, therefore, these need to be designed to allow safe passage. The continuity of riparian habitats enables a wide range of terrestrial species, for example lesser horseshoe bats, to migrate and disperse through the landscape. Connectivity should be maintained or restored where necessary as a means to ensure access for the features to sufficient habitat within the SAC.

2.3 Outline of Past and Current Management There are many different aspects to the management of this large and complex site. Refer to the Eastern Cleddau and Western Cleddau SSSI Site Management Statements for details.

2.4 Management Units

The plan area has been divided into management units to enable practical communication about features, objectives, and management. This will also allow us to differentiate between the different designations where necessary. In this plan the management units have been based on the following:

• SSSI boundaries • Location of key features such as Alluvial woodland and Ranunculion beds • Differences in the physical character and flow volumes between the reaches • Differences in land use and management issues between reaches • Estuaries: the reach below the tidal limit is a separate SAC

See accompanying maps showing the management units referred to in this plan.

7

The following table confirms the relationships between the management units and the designations covered:

Unit no. Unit name SAC SSSI NNR Other Western Cleddau 1 Main channel: Haverfordwest – junction a a with Spittal Brook Camrose Brook 2 Cartlett Brook a a 3 Main channel: Spittal Brook junction – a a confluence of Western Cleddau & Afon Cleddau 4 Rudbaxton Water a a Spittal Brook 5 Nant y Bugail a a Nant y Coy 6 Afon Anghof a a 7 Afon Cleddau & Western Cleddau head a a waters Eastern Cleddau 8 Narberth Brook a a Pont Shan 9 Conin a a 10 Main channel: Canaston bridge – a a junction with Syfynwy 11 Deepford Brook, inc. Cotland brook a a 12 Syfynwy below reservoir a a 13 Syfynwy above reservoir a a 14 Main channel: junction with Syfynwy – a a confluence of Afon Wern & EC 15 Afon Rhyd Afallen a a Llanycefn 16 Eastern Cleddau from the confluence with a a Afon Wern 17 Afon Wern a a Corsydd Llangloffan 18 CCW section a a a CCW owned 19 Central section a a a Privately owned 20 WTSWW section a a a Wildlife Trust owned 30 Jordanston section a a Esgyrn Bottom 21 Esgyrn Western section a(part) a 22 Esgyrn NE section a 23 Esgyrn SE Section a 29 Esgyrn Core a Wallis Moor 24 Wallis 1 (the part of the SSSI not SAC) a Common land 25 Wallis 2 (the part of the SSSI not SAC) a Common land 26 Wallis 3 (the part of the SSSI not SAC) a Common land 8

Unit no. Unit name SAC SSSI NNR Other 27 Wallis 4 a Common land 31 Cleddau SAC running through Wallis 2 a a 32 Cleddau SAC running through Wallis 1 a a 33 Cleddau SAC running through Wallis 4 a a Treffgarne Gorge & Tors 28 Components of TG&T SSSI & SAC a Geo SSSI

9

3. THE SPECIAL FEATURES

3.1 Confirmation of Special Features

Designated feature Relationships, nomenclature etc Conservation Objective in part 4 SAC features Annex II species that are a primary reason for selection of this site Brook lamprey Lampetra planeri These two species are generally 4.3 River Lamprey Lampetra fluviatilis indistinguishable for the purposes of 4.4 monitoring; however management requirements are similar Bullhead Cottus gobio 4.5 European otter Lutra lutra 4.6 Annex I habitats and Annex II species present as qualifying features, but not primary reasons for site selection Sea lamprey Petromyzon marinus 4.2 Alluvial forests with Alnus glutinosa 4.8 and Fraxinus excelsior (Alon- Padion, Alnion incanae, Salicion albae) *Priority feature Water courses of plain to montane 4.7 levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation Active raised bogs *Priority feature 4.9 SPA features Not applicable Ramsar features Not applicable SSSI features Potamogeton berchtoldii x P. Eastern Cleddau River SSSI polygonifolius (cf.) Semi-natural broadleaved woodland Cleddau Rivers SSSI and scrub Associated riverside habitats Cleddau Rivers SSSI (including marshy grassland, fen, swamp, mire and wet dwarf shrub heath)

SSSI features for other SSSI’s covered by plan to follow

10

3.2 Special Features and Management Units

This section sets out the relationship between the special features and each management unit. This is intended to provide a clear statement about what each unit should be managed for, taking into account the varied needs of the different special features.

All special features are allocated to one of seven classes in each management unit. These classes are:

Key Features KH - a ‘Key Habitat’ in the management unit, i.e. the habitat that is the main focus of management and monitoring effort, perhaps because of the dependence of a key species (see KS below). There will rarely be more than one Key Habitat in a unit. KS – a ‘Key Species’ in the management unit, often driving both the selection and management of a Key Habitat. Geo – an earth science feature that is the main focus of management and monitoring effort in a unit.

Other Features Sym - habitats, species and earth science features that are of importance in a unit but are not the main focus of management or monitoring. These features will benefit from management for the key feature(s) identified in the unit. These may be classed as ‘Sym’ features because: a) they are present in the unit but are of less conservation importance than the key feature; and/or b) they are present in the unit but in small areas/numbers, with the bulk of the feature in other units of the site; and/or c) their requirements are broader than and compatible with the management needs of the key feature(s). Nm - an infrequently used category where features are at risk of decline within a unit as a result of meeting the management needs of the key feature(s), i.e. under Negative Management. These cases will usually be compensated for by management elsewhere in the plan, and can be used where minor occurrences of a feature would otherwise lead to apparent conflict with another key feature in a unit. Mn - Management units with no special feature present but which are of importance for management of features elsewhere on a site e.g. livestock over-wintering area included within designation boundaries. x – Features not present in the management unit.

The tables below set out the relationship between the special features and management units identified in this plan:

11

River Cleddau Unit (Western Cleddau) 1 2 3 4 5 6 7 SAC a a a a a a a SSSI a a a a a a a SAC Features 1. Brook lamprey KS KS KS KS KS KS KS 2. River lamprey Sym Sym Sym Sym Sym Sym Sym 3. Sea lamprey Sym Sym Sym Sym Sym Sym Sym 4. Bullhead Sym Sym Sym Sym Sym Sym Sym 5. Otter KS KS KS KS KS KS KS 6. Alluvial forests Sym Sym Sym KH Sym x Sym 7. Ranunculion habitat KH KH KH Sym Sym Sym KH 8. Active raised bogs x x x x x x x

SSSI features

• Otter is present throughout and specific management measures for otter relating to adjacent habitats and disturbance require its selection as a key feature in all units. • The feature ‘Rivers with floating vegetation often dominated by water-crowfoot’ occurs in Units 1, 3 & 7 in this SAC and is therefore selected as a key habitat. • Both good alluvial woodland and Ranunculion habitat occur in units 3 & 4, which is why they have been selected as KH/sym in the same unit despite differing management requirements. The units are large enough to allow for both features to occur. • The feature ‘Rivers with floating vegetation often dominated by water-crowfoot’ is noted in unit 2, however it is selected as a KH as a driver for improved management • Brook lamprey are selected as a KS throughout, although where ranunclulion habitat is present, this will be the focus of management, with brook lamprey, sea lamprey and river lamprey and bullhead benefiting from sympathetic management. Where ranunclulion habitat is not present, brook lamprey will be the focus of management with sea lamprey and river lamprey and bullhead benefiting from sympathetic management. • Bullhead are widespread across the site with particularly high numbers recorded at Pelcombe Brook and Knook Brook, tributaries of the Main channel above Haverfordwest and Camrose Brook respectively. Management for other fish species is likely to be sympathetic for bullhead. • Local knowledge indicates sea lamprey and river lamprey were not getting past the Town weir in the past.

12

Esgyrn Bottom SSSI Units 21 22 23 29 SAC a SSSI a a a a SAC Features 1. Brook lamprey x x x x 2. River lamprey x x x x 3. Sea lamprey x x x x 4. Bullhead x x x x 5. Otter Sym Sym Sym Sym 6. Alluvial forests x x x x 7. Ranunculion x x x x habitat 8. Active raised bogs KH KH KH KH SSSI features

• Esgyrn Bottom lies at the head of the Afon Cleddau on the Western Cleddau and is the best example of a raised bog in the country, as well as the most south-westerly example of this habitat in the UK.

Corsydd Llangloffan Units 18 19 20 30 SAC a a a a SSSI a a a a SAC Features 1. Brook lamprey Sym Sym Sym Sym 2. River lamprey Sym Sym Sym Sym 3. Sea lamprey Sym Sym Sym Sym 4. Bullhead Sym Sym Sym Sym 5. Otter KS KS KS KS 6. Alluvial forests KH x x x 7. Ranunculion x KH x KH habitat 8. Active raised bogs x x x x SSSI features

13

River Cleddau Unit (Eastern Cleddau) 8 9 10 11 12 13 14 15 16 17 SAC a a a a a a a a a a SSSI a a a a a a a a a a SAC Features 1 Brook lamprey KS KS KS KS KS KS KS KS KS KS 2 River lamprey Sym Sym Sym Sym Sym x Sym Sym Sym Sym 3 Sea lamprey Sym Sym Sym Sym Sym x Sym Sym Sym Sym 4 Bullhead Sym Sym Sym Sym Sym Sym Sym Sym Sym Sym 5 Otter KS KS KS KS KS KS KS KS KS KS 6 Alluvial forests Sym Sym x Sym Sym x Sym KH Sym x 7 Ranunculion habitat Sym Sym KH Sym Sym Sym Sym Sym Sym Sym 8 Active raised bogs x x x x x x x x x x

SSSI features Potamogeton berchtoldii x x a x x x x x x x x P. polygonifolius (cf.)

• Otter is present throughout and specific management measures for otter relating to adjacent habitats and disturbance require its selection as a key feature in all units. • Significant Alluvial woodland occurs in unit 15 to justify its selection as a KH and is present in units 9, 14 & 16 where it will benefit from sympathetic management. • The feature ‘Rivers with floating vegetation often dominated by water-crowfoot’ occurs in unit 10 and is noted in units 8, 11 & 14. It is therefore selected as KH in unit 10, and as a sympathetic feature in 8, 11 & 14. • Brook lamprey are selected as a KS throughout, although where ranunclulion habitat is present, this will be the focus of management, with brook lamprey, sea lamprey and river lamprey and bullhead benefiting from sympathetic management. Where ranunclulion habitat is not present, brook lamprey will be the focus of management with sea lamprey and river lamprey and bullhead benefiting from sympathetic management. • Local knowledge indicates sea lamprey and river lamprey were not getting past the weir at Canaston in the past.

14

• 4. CONSERVATION OBJECTIVES

Background to Conservation Objectives: a. Outline of the legal context and purpose of conservation objectives.

Conservation objectives are required by the 1992 ‘Habitats’ Directive (92/43/EEC). The aim of the Habitats Directives is the maintenance, or where appropriate the restoration of the ‘favourable conservation status’ of habitats and species features for which SACs and SPAs are designated (see Box 1).

In the broadest terms, 'favourable conservation status' means a feature is in satisfactory condition and all the things needed to keep it that way are in place for the foreseeable future. CCW considers that the concept of favourable conservation status provides a practical and legally robust basis for conservation objectives for Natura 2000 and Ramsar sites.

Box 1 Favourable conservation status as defined in Articles 1(e) and 1(i) of the Habitats Directive

“The conservation status of a natural habitat is the sum of the influences acting on it and its typical species that may affect its long-term natural distribution, structure and functions as well as the long term survival of its typical species. The conservation status of a natural habitat will be taken as favourable when:

• Its natural range and areas it covers within that range are stable or increasing, and • The specific structure and functions which are necessary for its long-term maintenance exist and are likely to continue to exist for the foreseeable future, and

• The conservation status of its typical species is favourable.

The conservation status of a species is the sum of the influences acting on the species that

may affect the long-term distribution and abundance of its populations. The conservation

status will be taken as ‘favourable’ when:

• population dynamics data on the species indicate that it is maintaining itself on a

long-term basis as a viable component of its natural habitats, and • the natural range of the species is neither being reduced nor is likely to be reduced for the foreseeable future, and • There is, and will probably continue to be, a sufficiently large habitat to maintain its populations on a long-term basis.”

Achieving these objectives requires appropriate management and the control of factors that may cause deterioration of habitats or significant disturbance to species.

As well as the overall function of communication, Conservation objectives have a number of specific roles:

• Conservation planning and management.

The conservation objectives guide management of sites, to maintain or restore the habitats and species in favourable condition.

15

• Assessing plans and projects.

Article 6(3) of the ‘Habitats’ Directive requires appropriate assessment of proposed plans and projects against a site's conservation objectives. Subject to certain exceptions, plans or projects may not proceed unless it is established that they will not adversely affect the integrity of sites. This role for testing plans and projects also applies to the review of existing decisions and consents.

• Monitoring and reporting.

The conservation objectives provide the basis for assessing the condition of a feature and the status of factors that affect it. CCW uses ‘performance indicators’ within the conservation objectives, as the basis for monitoring and reporting. Performance indicators are selected to provide useful information about the condition of a feature and the factors that affect it.

The conservation objectives in this document reflect CCW’s current information and understanding of the site and its features and their importance in an international context. The conservation objectives are subject to review by CCW in light of new knowledge.

b. Format of the conservation objectives

There is one conservation objective for each feature listed in part 3. Each conservation objective is a composite statement representing a site-specific description of what is considered to be the favourable conservation status of the feature. These statements apply to a whole feature as it occurs within the whole plan area, although section 3.2 sets out their relevance to individual management units.

Each conservation objective consists of the following two elements: 1. Vision for the feature 2. Performance indicators

As a result of the general practice developed and agreed within the UK Conservation Agencies, conservation objectives include performance indicators, the selection of which should be informed by JNCC guidance on Common Standards Monitoring 1.

There is a critical need for clarity over the role of performance indicators within the conservation objectives. A conservation objective, because it includes the vision for the feature, has meaning and substance independently of the performance indicators, and is more than the sum of the performance indicators . The performance indicators are simply what make the conservation objectives measurable, and are thus part of, not a substitute for, the conservation objectives. Any feature attribute identified in the performance indicators should be represented in the vision for the feature, but not all elements of the vision for the feature will necessarily have corresponding performance indicators.

As well as describing the aspirations for the condition of the feature, the Vision section of each conservation objective contains a statement that the factors necessary to maintain those desired conditions are under control. Subject to technical, practical and resource constraints, factors which have an important influence on the condition of the feature are identified in the performance indicators.

1 Web link: http://www.jncc.gov.uk/page-2199

16

The ecological status of the watercourse is a major determinant of FCS for all features. The required conservation objective for the watercourse is defined below.

4.1 Conservation Objective for the watercourse

4.1.1 The capacity for the habitats in the SAC to support each feature at near-natural population levels, as determined by predominantly unmodified ecological and hydromorphological processes and characteristics, should be maintained as far as possible, or restored where necessary. 4.1.2 The ecological status of the water environment should be sufficient to maintain a stable or increasing population of each feature. This will include elements of water quantity and quality, physical habitat and community composition and structure. It is anticipated that in most instances these limits will concur with the standards used by the Review of Consents process. 4.1.3 Flow regime, water quality and physical habitat should be maintained in, or restored as far as possible to, a near-natural state, in order to support the coherence of ecosystem structure and function across the whole area of the SAC. 4.1.4 All known breeding, spawning and nursery sites of species features should be maintained as suitable habitat as far as possible, except where natural processes cause them to change. 4.1.5 Flows, water quality, substrate quality and quantity at fish spawning sites and nursery areas will not be depleted by abstraction, discharges, engineering or gravel extraction activities or other impacts to the extent that these sites are damaged or destroyed. 4.1.6 The river planform and profile should be predominantly unmodified. Physical modifications having an adverse effect on the integrity of the SAC, including, but not limited to, revetments on active alluvial river banks using stone, concrete or waste materials, unsustainable extraction of gravel, addition or release of excessive quantities of fine sediment, will be avoided. 4.1.7 River SSSI features should be in favourable condition. 4.1.8 Artificial factors impacting on the capability of each species feature to occupy the full extent of its natural range should be modified where necessary to allow passage, eg. weirs, bridge sills, acoustic barriers. The reservoir dams on the Syfynwy are excluded. 4.1.9 Natural factors such as waterfalls, which may limit the natural range of a species feature or dispersal between naturally isolated populations, should not be modified. 4.1.10 Flows during the normal migration periods of sea and river lamprey will not be depleted by abstraction to the extent that passage upstream to spawning sites is hindered. 4.1.11 Levels of nutrients, in particular phosphate, will be agreed between EA and CCW for each Water Framework Directive water body in the Cleddau SAC, and measures taken to maintain nutrients below these levels. It is anticipated that these limits will concur with the standards used by the Review of Consents process. 4.1.12 Levels of all other water quality parameters that could affect the distribution and abundance of all species will be agreed between EA and CCW for each Water Framework Directive water body in the Cleddau SAC, and measures taken to maintain pollution below these levels. It is anticipated that these limits will concur with the standards used by the Review of Consents process. Potential sources of pollution not addressed in the Review of Consents, such as contaminated land, will be considered in assessing plans and projects. 4.1.13 Potential sources of pollution not addressed in the review of consents, such as contaminated land, will be considered in assessing plans and projects. 4.1.14 Levels of suspended solids will be agreed between EA and CCW for each Water Framework Directive water body in the Usk SAC. Measures including, but not

17

limited to, the control of suspended sediment generated by agriculture, forestry and engineering works, will be taken to maintain suspended solids below these levels.

In the Cleddau catchment, the most significant sources of diffuse pollution and siltation are from agriculture, including fertiliser run-off, livestock manure, silage effluent and soil erosion from ploughed land. The most intensively used areas such as heavily trampled gateways and tracks can be especially significant sources of polluting run-off. Preventative measures can include surfacing of tracks and gateways, moving feeding areas, and separating clean and dirty water in farmyards. Farm operations should avoid ploughing land which is vulnerable to soil erosion or leaving such areas without crop cover during the winter.

Among toxic pollutants, sheep dip and silage effluent present a particular threat to aquatic animals in this predominantly rural area, especially in the head waters of the Eastern Cleddau. Contamination by synthetic pyrethroid sheep dips, which are extremely toxic to aquatic invertebrates, has a devastating impact on crayfish populations and can deprive fish populations of food over large stretches of river. These impacts can arise if recently dipped sheep are allowed access to a stream or hard standing area, which drains into a watercourse. Pollution from organophosphate sheep dips and silage effluent can be very damaging locally. Pollution from slurry and other agricultural and industrial chemicals, including fuels, can kill all forms of aquatic life. All sheep dips and silage, fuel and chemical storage areas should be sited away from watercourses or bunded to contain leakage. Recently dipped sheep should be kept off stream banks. Used dip should be disposed of strictly in accordance with Environment Agency Regulations and guidelines. Statutory and voluntary agencies should work closely with landowners and occupiers to minimise the risk of any pollution incidents and enforce existing regulations.

Measures to control diffuse pollution in the water environment, including ‘Catchment Sensitive Farming’, may be implemented as a result of the Water Framework Directive and, along with existing agri-environment schemes, including CCW’s Living rivers Scheme will help to achieve the conservation objectives for the SAC.

Discharges from sewage treatment works, urban drainage, engineering works such as road improvement schemes, contaminated land, and other domestic and industrial sources can also be significant causes of pollution, and must be managed appropriately. Current consents for discharges entering, or likely to impact upon the site should be monitored, reviewed and altered if necessary.

Overhanging trees provide valuable shade and food sources, whilst tree root systems provide important cover and flow refuges for juveniles. At least 50% high canopy cover to the water course/banks should be maintained, where appropriate. Some reaches may naturally have lower tree cover. Cover may also be lower in urban reaches.

18

4.2 Conservation Objective for Feature 1: Sea lamprey Petromyzon marinus (EU Species Code: 1095 )

Vision for feature 1

The vision for this feature is for it to be in a favourable conservation status, where all of the following conditions are satisfied: h The conservation objective for the watercourse as defined in 4.1 above is met. h The population of the feature in the SAC must be stable or increasing over the long term. h The natural range of the feature in the SAC is neither being reduced nor is likely to be reduced for the foreseeable future. The natural range is taken to mean those reaches where predominantly suitable habitat for each life stage exists over the long term. Suitable habitat is defined in terms of near-natural hydrological and geomorphological processes and forms e.g. suitable flows to allow upstream migration, depth of water and substrate type at spawning sites, and ecosystem structure and functions e.g. food supply (as described in section 2.2). Suitable habitat need not be present throughout the SAC but where present must be secured for the foreseeable future. h Passage of the feature through the SAC is not to be hindered by artificial barriers such as weirs. h The characteristic channel morphology provides the diversity of water depths, current velocities and substrate types necessary to fulfil the habitat requirements of the features. The close proximity of different habitats facilitates movement of fish to new preferred habitats with age.

Performance indicators for feature 1

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition: Sea lamprey Petromyzon marinus Attribute Attribute rational and other comments Specified limits a) Distribution within This attribute provides evidence of successful Lower limit: not catchment spawning and distribution trends. determined There is currently a lack of data regarding current and historical sea lamprey spawning Upper limit: none set sites. Spawning locations may move within and Any silt beds adjacent to between sites due to natural processes or new or downstream of suitable sites may be discovered over time. Silt beds spawning sites should downstream of all potential sites will be contain Petromyzon sampled for presence or absence of ammocoetes. ammocoetes. Where apparently suitable habitat at any site is unoccupied feature condition will be considered unfavourable

19 b) Ammocoete density This standard CSM attribute establishes a Ammocoetes should be minimum occupied spawning range within any present in at least four sampling period of 15km. sampling sites each not less than 5km apart.

4.3 Conservation Objective for Feature 2 & 3: Brook lamprey Lampetra planeri (EU Species Code : 1096 ); River lamprey Lampetra fluviatilis (EU Species Code : 1099 )

Vision for features 2 & 3

The vision for the feature is for it to be in a favourable conservation status, where all of the following conditions are satisfied: h The conservation objective for the watercourse as defined in 4.1 above is met h The population of the feature in the SAC must be stable or increasing over the long term. h The natural range of the feature in the SAC is neither being reduced nor is likely to be reduced for the foreseeable future. The natural range is taken to mean those reaches where predominantly suitable habitat for each life stage exists over the long term. Suitable habitat is defined in terms of near-natural hydrological and geomorphological processes and forms e.g. suitable flows to allow upstream migration, depth of water and substrate type at spawning sites, and ecosystem structure and functions e.g. food supply (as described in section 2.2). Suitable habitat need not be present throughout the SAC but where present must be secured for the foreseeable future. h Passage of the feature through the SAC is not to be hindered by artificial barriers such as weirs. h The characteristic channel morphology provides the diversity of water depths, current velocities and substrate types necessary to fulfil the habitat requirements of the features. The close proximity of different habitats facilitates movement of fish to new preferred habitats with age.

20

Performance indicators for features 2 & 3

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition: Brook lamprey Lampetra planeri & River lamprey Lampetra fluviatilis: Attribute Comments Specified limits a) Age/size structure This gives an indication of recruitment to the Samples < 50 ammocoetes of ammocoete population over the several years preceding the 2 size classes population survey. Failure of one or more years Samples > 50 ammocoetes recruitment may be due to either short or long at least 3 size classes term impacts or natural factors such as natural flow variability, therefore would trigger further investigation of the cause rather than leading automatically to an unfavourable condition assessment b) Distribution of The natural range of this species in terms of Present at not less that 2/3 ammocoetes within ammocoete distribution includes all units of sites surveyed within catchment A minimum of 30 sample sites will be natural range monitored at 6 yearly intervals when presence at less than 2/3 will lead to an unfavourable condition assessment Reduction in distribution will be defined as No reduction in distribution absence of ammocoetes from all samples of ammocoetes within a single unit, and will lead to an unfavourable condition assessment c) Ammocoete Optimal habitat is defined as stable fine Optimal habitat: >10m -2 density sediment or sand >15cm deep, low water velocity and the presence of organic detritus. Overall catchment mean: Sub-optimal habitat is defined as shallow >5m -2 sediment, often patchy and interspersed among coarser substrate

4.4 Conservation Objective for Feature 4: - Bullhead Cottus gobio (EU Species Code : 1163 )

Vision for feature 4

The vision for this feature is for it to be in a favourable conservation status, where all of the following conditions are satisfied: h The conservation objective for the watercourse as defined in 4.1 above must be met h The population of the feature in the SAC must be stable or increasing over the long term. h The natural range of the feature in the SAC is neither being reduced nor is likely to be reduced for the foreseeable future. The natural range is taken to mean those reaches where predominantly suitable habitat for each life stage exists over the long term. Suitable habitat is defined in terms of near-natural hydrological and geomorphological processes and forms e.g. suitable flows to allow upstream migration, depth of water and

21

substrate type at spawning sites, and ecosystem structure and functions e.g. food supply (as described in section 2.2). Suitable habitat need not be present throughout the SAC but where present must be secured for the foreseeable future. h Passage of the feature through the SAC is not to be hindered by artificial barriers such as weirs. h The characteristic channel morphology provides the diversity of water depths, current velocities and substrate types necessary to fulfil the habitat requirements of the features. The close proximity of different habitats facilitates movement of fish to new preferred habitats with age.

Performance indicators for feature 4

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition: Bullhead Cottus gobio Attribute Comments Specified limits a) Adult densities CSM guidance states that there should be no No less than 0.2 m -2 in reduction in densities from existing levels, and in sampled reaches any case no less than 0.2 m -2 in upland rivers (source altitude >100m) and 0.5 m -2 in lowland rivers (source altitude ≤100m) b) Distribution Absence of bullheads from reaches identified as Bullheads should be suitable or previously occupied, revealed by on- present in all suitable going monitoring will result in an unfavourable reaches. As a minimum, condition assessment no decline in distribution from current c) Reproduction / age This gives an indication of successful Young-of-year fish structure recruitment and a healthy population structure should occur at densities at least equal to adults

4.5 Conservation Objective for Feature 5: - European otter Lutra lutra (EU Species Code: 1355 )

Vision for feature 5 The vision for this feature is for it to be in a favourable conservation status, where all of the following conditions are satisfied: h The population of otters in the SAC is stable or increasing over the long term and reflects the natural carrying capacity of the habitat within the SAC h The SAC will have sufficient habitat, including riparian trees and vegetation and wetlands, to support the otter population in the long term h The natural range of otters in the SAC is neither being reduced nor is likely to be reduced for the foreseeable future.

22 h The otter must be able to breed and recruit successfully in the SAC. The size of breeding territories may vary depending on prey abundance. h Otter food sources must be sufficient for maintenance of the population. h The safe movement and dispersal of individuals around the SAC is facilitated by the provision, where necessary, of suitable riparian habitat, and underpasses, ledges, fencing etc at road bridges and other artificial barriers. h No otter breeding site should be subject to a level of disturbance that could have an adverse effect on breeding success. Where necessary, potentially harmful levels of disturbance must be managed.

Performance indicators for feature 5

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition Attribute Attribute rational and other comments Specified limits a) Distribution Results from the Otter Survey of Wales 2002 Lower Limit: Otter signs show that otter signs (spraints or footprints) found at 85% of Otter were found at 97% of the sites searched Survey of Wales full survey throughout the Cleddau catchment. The figure sites (current level: 97%) for the lower limit is set at 85% to allow for a within the Eastern and small number of sites to be negative as a result Western Cleddau. of factors such as weather conditions or Upper Limit: None set. surveyor error. b) Breeding activity Evidence that otter breeding has taken place Lower Limit: 2 reports within the catchment is usually derived from (within the catchment) of three sources: otter road mortalities where otter cub/family sightings pregnant/lactating females, and/or cubs are or 2 reports of cubs, involved, sighting of cubs (usually together lactating females or with the female); and cubs found abandoned pregnant females from otter (either separated from the family group or road casualties are recorded orphaned as a result of the death of the for at least 1 year in any mother.) three year period. Upper Limit: None set. c) Actual and *21 actual or potential sites have been Lower Limit: There should potential breeding identified on the Western Cleddau, and 20 sites be no reduction or decline sites identified on the Eastern Cleddau. in the number or quality of identified actual or potential breeding sites. Upper Limit: None set. Performance indicators for factors affecting the feature Water quality a) Water quality River Ecosystem Classification. To maintain and restore (EA classification). RE1 across catchment with no increase in pollutants potentially toxic to otters Ecosystem structure and function

23 b) Food availability Studies have indicated that the viability of an Fish biomass stays within otter population partially relates to the viability expected of its food sources natural fluctuations Otters depend on food that comes from a range of aquatic environments, such as small streams and marshes (Chanin 2003a). Fish make up the majority of the otter diet (often >75%), though amphibians and crustaceans are also constituents. Eels are particularly favoured. At times, an alternative prey, such as frogs, can assume a greater importance than fish. Data on fish stocks from Environment Agency. (EA assessments for Salmonids and non- salmonids) c) Riparian habitat Certain areas of the SAC are critical to the No overall permanent movement of otters both within the system and decrease and no overall loss to adjacent sites. in sensitive areas. Negative indicators a) Anthropogenic Road deaths have been clearly noted as a No increase in numbers of mortality primary threat to the otters conservation status recorded Road Deaths. across Wales. Liles and Colley (2000) identified numerous road death black spots in the Cleddau catchment, and mitigation has taken place. Future mitigation should be focused on sites identified adjacent to potential breeding areas. b) Disturbance Otters are sensitive to human disturbance and No significant change to especially to sudden changes in activity. They bank side usage, no are particularly sensitive to disturbance by significant development, dogs. The female otter is particularly sensitive particularly in sensitive to disturbance when she has cubs. areas.

*78 sites were identified during an initial desk top study (35 on the Western and 43 on the Eastern). Of these 21 sites on the Western and 20 sites on the Eastern were classified in categories A-C, as defined below:

A: Good habitat, “Confirmed” sites from corroborative evidence such as Road deaths of lactating bitches or cubs, sightings of cubs or family groups and an assessment of age from description. B: Habitat good for breeding but no historical supportive evidence but field signs suggest breeding C: Good habitat but no corroborative evidence.

Jones, (2004) states that the of the original 78 sites, those not included in the above categories, and therefore discarded as breeding sites are not necessarily never used by otters as breeding sites, however they do not compare in habitat terms with these listed sites.

24

4.6 Conservation Objective for Feature 6: - Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation (EU Habitat code: 3260)

Vision for feature 6

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators. h The conservation objective for the watercourse as defined in 4.1 above must be met h The natural range of the plant communities represented within this feature should be stable or increasing in the SAC. The natural range is taken to mean those reaches where predominantly suitable habitat exists over the long term. Suitable habitat and associated plant communities may vary from reach to reach. Suitable habitat is defined in terms of near-natural hydrological and geomorphological processes and forms eg. depth and stability of flow, stability of bed substrate, and ecosystem structure and functions eg. nutrient levels, shade (as described in section 2.2 ). Suitable habitat for the feature need not be present throughout the SAC but where present must be secured for the foreseeable future, except where natural processes cause it to decline in extent. h The area covered by the feature within its natural range in the SAC should be stable or increasing. h The conservation status of the feature’s typical species should be favourable condition. The typical species are defined with reference to the species composition of the appropriate JNCC river vegetation type for the particular river reach, unless differing from this type due to natural variability when other typical species may be defined as appropriate.

Performance indicators for feature 6

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition Attribute Comments Specified limits a) Distribution within Ranunculus spp. will be present with an MTR Distribution within site catchment species cover score of at least 50 in: units 1, 3, 7 & 10 Any three representative sample 100m stretches of suitable habitat in units 1, 3, 7 & 10

The feature should also be present in one representative sample 100m stretch of suitable habitat in unit 2, although failure of this unit alone will not make the feature fail as a whole.

25 b) Typical species Should conform to appropriate JNCC type: Characteristic plant species Ranunculion fluitantis and Callitricho- should dominate the Batrachion Vegetation communities: assemblage

CB5: Atlantic bryophyte Callitriche hamulata/Ranunculus penicillatus spp. penicillatus rivers. Typical species also include Potamogeton crispus, Myriophyllum alternifolium, Fontinalis antipyretica, F. squamosa, Hygrohypnum ochraceum, Amblystegium fluviatile, Amblystegium riparium, Brachythecium plumosum, Racomitrium aciculare, Rhyncostegium riparoides and Scapania spp. Performance indicators for factors affecting the feature Negative indicators a) Native species CSM guidance states: Care should be taken Cover of indicators of with the setting of these targets as thresholds eutrophication maintained may vary considerably by site and conservation below threshold over the goals medium to long term

For the Afonyd Cleddau SAC:

Algae indicative of eutrophication (Enteromorpha spp., Cladophora spp. and Vaucheria spp.) should not have an MTR cover value of greater than 5 (ie.10%) in 3 consecutive years in: Any three representative sample 100m stretches of suitable habitat in units 1, 3, 7 & 10 AND In one representative sample 100mm stretch of suitable habitat in unit 2, although failure of this unit alone will not make the feature fail as a whole. b) Alien / introduced In the CSM guidance, the SERCON scoring No impact on native biota species system for naturalness of aquatic and marginal from alien macrophytes and naturalness of banks and or introduced species riparian zone, are used to assess this attribute. SERCON protocols have not been applied in the Afonydd Cleddau SAC, therefore assessment of this attribute relies on locally defined thresholds and expert judgement. Details to be confirmed

26

4.7 Conservation Objective for Feature 7: Alluvial forests with Alnus glutinosa and Fraxinus excelsior ( Alno-Padion , Alnion incanae , Salicion albae ) (EU Habitat code: 91E0)

Vision for feature 7

The vision for this feature is for it to be in a favourable conservation status, where all of the following conditions are satisfied:

• The canopy is dominated by single stands of alder Alnus glutinosa or willow Salix spp. In alluvial woods with free draining soils there may be ash or oak in the canopy, but in the wetter alluvial woodlands ash Fraxinus excelsior is more likely to be limited to areas of relatively drier ground • The structure of alluvial woodland is recognised as being dynamic therefore the presence of over mature trees is desirable but not essential • The river itself should be dynamic to allow for areas of outwash and deposition that trees can regenerate on. • Lying or standing deadwood (> 20cm diameter and > 1m length) is present at all sites • The feature should support alluvial ground flora including two of the following: meadowsweet Filipendula ulmaria , yellow flag Iris pseudacorus , nettle Urtica dioica , common reed Phragmities austrailis , greater tussock sedge Carex paniculata , opposite-leaved golden saxifrage Chrysosplenium oppositifolium , rushes Juncus spp , tufted hair-grass Deschampsia cespitosa , hemlock water-dropwort Onanthe crocata, and wild angelica Angelica sylvestris .

Performance indicators for feature 7

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition Attribute Attribute rational and other comments Specified limits Extent To be defined following further survey, as Lower Limit: To be original estimate of 132.66 ha was based on a defined following further contract survey (Jones, 2004); the accuracy of survey. which is questioned following limited field- testing. Upper Limit: None set.

Loss of woodland cover should only occur AND through natural processes e.g. river movement No reduction in the total creating natural re-channelling, silt deposits; number of sites: and storm damage. Lower Limit: 72 sites The feature was considered to be present on 44 supporting alluvial sites on the Western Cleddau and 28 sites on woodland the Eastern Cleddau, however the accuracy of the data requires field-testing (See map 4.8.1) Upper Limit: Not required

27

Quality The site-specific definition of good condition Upper Limit : none set alluvial woodland provided below is based on Lower Limit : 3 out of 4 Common Standards Monitoring Guidance sample woodlands on each For Woodland Habitats (JNCC, 2004) and arm of the Cleddaus to CCW SAC monitoring in 2004. (See Lovering, meet site-specific 2005). assessment of good condition alluvial woodland . Structure and The canopy is dominated by alder Alnus glutinosa or willow Salix spp. In processes alluvial woods with free draining soils there may be ash or oak in the canopy, but in the wetter alluvial woodlands ash Fraxinus excelsior will be limited to areas of relatively drier ground. 50% - 90% of the canopy forming trees are alder. • At least one example of each age component present (sapling if the survey site has a gap or woodland edge, mature, over mature, deadwood) • The under-storey covers between 5-30% in at least 80% of survey sites • Gaps large enough to cause a noticeable growth response from ground vegetation in >40% of survey sites • Dense thickets of bramble cover <10% of individual sites and are confined to drier margins of habitat. • **Deadwood, lying or standing > 20 cm diameter and > 1 m length present at 80% of survey sites. (see note, below) • No evidence of alder disease. Regeneration ***Regeneration occurring and 90% alder and willow (see note, below) Non-native species <5% of the canopy forming trees across the woodland are non-native Exotics cover < 10% ground Ground flora 60% of the survey sites should support alluvial ground flora including two of the following: meadowsweet Filipendula ulmaria , yellow flag Iris pseudacorus , nettle Urtica dioica , common reed Phragmities austrailis , greater tussock sedge Carex paniculata , opposite-leaved golden saxifrage Chrysosplenium oppositifolium , rushes Juncus spp , tufted hair-grass Deschampsia cespitosa , hemlock water-dropwort Onanthe crocata, and wild angelica Angelica sylvestris . Site-specific habitat definitions good condition alluvial woodland Performance indicators for factors affecting the feature Hydrology Extensive bramble cover is an indicator that the Dense thickets of bramble site maybe drying out. However, it is worth cover <10% of individual noting that dense bramble cover offers sites and are confined to potential for otter natal holts if other conditions drier margins of habitat. pertaining to otters are satisfied. (area >0.5ha, one or more natal dens, free from flood risk and close to a good food supply) Grazing Grazing pressure will have an influence on the No impact on regeneration ground layer and regeneration. Light, and ground flora criteria controlled grazing is permitted, stock exclusion satisfied is preferable

*Specified area tbc. **Deadwood

28

Alluvial woodland is a dynamic habitat and lying deadwood can be flushed away or deposited seasonally through a series of sites. Therefore failure in this quality indicator alone will not result in the site failing.

***Regeneration There is very little (if any) regeneration from seed within alluvial woodland, this is to be expected as Alnus, Salix and Betula generally seed along edges or into open areas of successionally younger vegetation, where there is less competition for light. Therefore it is accepted that there is unlikely to be any seedling establishment within the woodland itself. In order to ensure continuation of the woodland it is expected that regeneration will be vegetative from the base of stems and from vertical growth from fallen branches.

4.8 Conservation Objective for Features 8: Active raised bogs (EU Habitat code 7110)

Vision for feature 8

The vision for this feature is for it to be in a favourable conservation status, where all of the following conditions are satisfied:

• On the mire expanse there are at least 3 of Calluna vulgaris , Erica tetralix , Eriophorum angustifolium , E.vaginatum & Trichophorum cespitosum constant, with a combined cover not exceeding 80% • No single species > 50% cover • At least one of Andromeda polifolia, Drosera rotundifolia, Empetrum nigrum, Narthecium ossifragum and Vaccinium oxycoccos occurs at least frequently • On the mire expanse only there are at least 2 of the following spp. constant, with a combined cover > 20%: Sphagnum capillifolium, S. magellanicum, S. papillosum, S. tenellum • No reduction in extent of microtopographic features (e.g. bog pools).

29

Performance indicators for feature 8

The performance indicators are part of the conservation objective, not a substitute for it. Assessment of plans and projects must be based on the entire conservation objective, not just the performance indicators.

Performance indicators for feature condition Attribute Attribute rational and other comments Specified limits a) Extent There should be no reduction in the total Lower Limit: No reduction in extent (area) of bog, including any associated extent. pools and lagg fen as mapped by Phase II Lowland Peatland Survey (August 2005): Upper Limit : Not set

The extent of the Active raised bog : NVC communities M2a:<0.1 ha; M17: 1.3 ha, M18: 1.0 ha; M21: <0.1 ha) Total extent: c. 2.3 ha. and lagg fen communities: NVC communities M6: c. 1.0 ha; M23: 1.8 ha: M25: 7.1 ha; M27: 0.3 ha; S4: 0.1 ha; W4: 0.1 ha) Total extent: 10.4 ha and degraded bog communities: NVC communities: M15: 3.2 ha; M25: 7.1 ha (as in lagg above) or dry heath types H4: 1.5 Total extent: 11.8 ha. b) Habitat Site Specific definitions: Lower limit: composition mire expanse (2.3 ha): Bog is taken here to be the peat deposit M2a: at least 0.1 ha i.e. 10% of together with typical bog vegetation, M17-M18 in I & L, irrespective of the precise nature and M18 at least 1.0 ha and, condition M17 upper limit 1.3 ha. of that vegetation. lagg fen (10.4 ha): M6: c. 1.0 ha Lagg fen comprises both M23: 1.8 ha: peat deposit and vegetation, irrespective of M25: 7.1 ha; nature and condition. M27: 0.3 ha; S4: 0.1 ha; W4: 0.1 ha

Upper Limit: Not set Performance indicators for factors affecting the feature a) Indicators This target applies to the whole bog, not Lower limit: none set of just the mire expanse. The plants listed negative are indicators of enrichment or of drying Upper limit: change- out of the bog. No more than 1% cover of the non-woody Phragmite s is acceptable around upwellings following on vascular plant or the bog surface (subject to species their equivalent on ditched bogs. exceptions in

comments column): Phragmites Invasive non-native plant species should be australis,Phalaris arundinacea,

30

absent or no more than rare (if present at Glyceria maxima,Epilobium baseline) hirsutum, Urtica dioica, Pteridium aquilinum, Rubus fruticosus, Juncus effusus,Deschampsia cespitosa, Cirsium spp . b) Invasion by woody species and their Lower limit: not set Development development to healthy maturity may of scrub indicate Upper limit: drying out and/or enrichment. Trees and On the mire expanse, trees and shrubs shrubs ( Betula, will exacerbate drying out. Salix, Rhododendron, Pinus species, Salix spp. and Myrica gale can occur on other raised gymnosperms no more than rare and bogs, but scrub generally constrains itself to < 5% areas where it receives a source of nutrients cover (e.g. near water that has passed through or On the bog margin (rand) woody over a mineral soil). As a result, it often is species < 10% cover found close to or on the ‘rand’ of the raised bog, where it is more acceptable. Drainage Raised bogs need a high and relatively Limits : Water table depths should constant water table level. Artificial drainage not exceed 20 cm below ground has had a major impact at this site; this level in an average summer. results in water table drawdown, oxidation Flooding should be confined to and wastage of peat, and the release of natural hollows only and result from nutrients into the peat, and dissolved organic rainfall and not overbank flooding. carbon into dependent water courses. The effects of drainage at this site need to be countered through a programme of hydrological restoration using peat dams and bunds. Atmospheric Rainfall constitutes the sole supply of water Upper limit: 10 kg N/ha/yr deposition and nutrients to raised bog habitats. This Lower limit. None set. results in characteristically nutrient-poor and acidic soil chemistry. This characteristic also renders raised bogs highly sensitive to atmospheric pollution. Nitrogen is of particular concern, and N deposition in the area has been estimated at 21.6 kg N/ha/yr (source: UK Air Pollution Information Service – www.apis.ac.uk ), well in excess of the published Critical Load for this habitat of between 5 and 10 kg N/ha/yr. Improvements in air quality require concerted policy measures at a UK level, as well as local development control to eliminate or reduce proximal sources of nitrogen.

31

5. ASSESSMENT OF CONSERVATION STATUS AND MANAGEMENT REQUIREMENTS

This part of the document provides: • A summary of the assessment of the conservation status of each feature. • A summary of the management issues that need to be addressed to maintain or restore each feature.

5.1 Conservation status and management requirements of Feature 1: Sea lamprey Petromyzon marinus

Conservation status

Status: Unfavourable: Unclassified.

Monitoring in 2004 found no sea lamprey ammocoetes in either optimal or sub-optimal habitat. There are no records of adult migrating sea lamprey held on file. For this reason the status of sea lamprey must be considered unfavourable .

Whilst barriers to migration are considered, it is unlikely that these are the only reason for the lack of sea lamprey found. Recent improvements to the two main barriers to migration in the SAC have been undertaken. In 2003 a fish pass has been installed in Haverfordwest Weir on the Western Cleddau that should be negotiable by sea lamprey. On the Eastern Cleddau at Canaston Bridge a special lamprey pass was installed in 2007. These improvements should have removed the two main barriers to migration.

It is possible that sea lamprey ammocoetes may occupy different habitat to that of river and brook lamprey. Also, as river and brook lamprey spawn earlier than sea lamprey, they may occupy the optimal habitat to the exclusion of sea lamprey, forcing sea lamprey to find other suitable habitat and to spawn in deeper areas of the river. It is a recommendation of the 2005 APEM report that areas such as deeper pools are assessed for the presence of sea lamprey ammocoetes.

Management requirements

The impacts of barriers to migration have been largely over come since installation of the fish passes at Haverfordwest and Canaston Bridge. Smaller weirs remain, on the Anghof, upper Eastern Cleddau, Vicars Mill on the Eastern Cleddau and the Llys y Fran Dam on the Syfynwy, but these barriers are higher in the catchment, leaving much of the river accessible.

The impact of acoustic (i.e. noise/vibration) and sediment/chemical barriers arising from plans or projects should also be assessed. When arising from construction or other development related activities it may be necessary to restrict timing of such activities.

The impact of flow depletion downstream of a number of abstractions was assessed in the Review of Consents process. Abstractions which may have an impact on the features of the SAC have passed to stage 4 for options appraisal. The outcome of these assessments is awaited.

Entrainment in water abstractions directly impacts on population dynamics through reduced recruitment and survival rates. Information on likely rates of entrainment of lamprey ammocoetes is required before acceptable levels can be assessed.

32

The impact of lowered temperatures from the hypolimnial release at Llys y Fran on the Cleddau also has the potential to impact upon lamprey. The anadromous sea lamprey is temperature dependent at critical freshwater life stages. Migration of sea lamprey into estuaries usually occurs from April onwards at temperatures of between 10-18 oC, and spawning occurs when water temperatures increase above a threshold of 15 oC, usually between May and June. The critical spawning temperature range for sea lamprey is considered to be 11-25 oC, and eggs require temperatures of 15-25 oC to hatch. Distribution of lamprey within the Cleddau catchment is therefore also likely to be limited by the current river temperature regime.

The extent and quality of suitable sea lamprey habitat must be maintained. Elevated levels of fines (particles <0.83mm) within spawning substrates can interfere with egg survival. Spawning habitat consists of well-oxygenated gravel/pebble substrate of >10cm depth in a range of water depths (0.2 to 1.5m). Sea and river lamprey tend to spawn in deeper water than brook lamprey. Nursery habitat consists of open-structured, aerated, silty and sandy substrates between 2 and 40cm depth generally in shallow (<0.5m) slack-water channel margins with some shade.

The 2005 APEM report describes optimal habitat [nursery areas] as areas identified with: • Several square metres of stable, fine sediment at least 150mm deep • Low water velocity • Shallow water depth • Organic detritus • Presence of shade The APEM report also describes sub-optimal habitat [nursery areas] as patchy, shallow sediment interspersed among coarser substrate with comparatively high velocity flow, more typically described as salmonid fry and parr habitat. All of the sub-optimal habitat sites contained a few square centimetres of silt or fine sand.

In the Afonydd Cleddau catchment, the most significant sources of diffuse pollution and siltation are from agriculture, including fertiliser run-off, livestock manure, silage effluent and soil erosion from ploughed land. The most intensively used areas such as heavily trampled gateways and tracks can be especially significant sources of polluting run-off. Preventative measures can include surfacing of tracks and gateways, moving feeding areas, and separating clean and dirty water in farmyards.

If appropriate, land bordering the SAC can be entered into a Living Rivers Agreement for improvements such as stock exclusion and buffer strips, especially on reaches adjacent to intensively managed livestock grazing or arable land.

Other measures to control diffuse pollution in the water environment, including ‘Catchment Sensitive Farming’, may be implemented as a result of the Water Framework Directive and, along with existing agri-environment schemes, will help to achieve the conservation objectives for the SAC.

A pilot project looking at Catchment Sensitive Farming on the Deepford brook began in 2006/07 running through until the end of the 07/08 financial years. Deepford brook was chosen as a pilot in order to work on a predominantly dairy/intensive livestock catchment. The primary aim of the work was to investigate methods for reducing diffuse pollution coming from agricultural practice, and the response of the farming community to these methods and the interventions needed to undertake them. The way the project aimed to achieve these reductions was through provision of advice, support and financial grants to farmers/landowners in order to allow them to change aspects of their farm infrastructure or management in ways that will reduce run off and the potential of that run off to be loaded with pollutants such as soil, phosphorus, ammonia, sheep dip and organic material. The effectiveness of this scheme now needs to be assessed.

A trial project targeting all farms in the catchments of the Cartlett, Anghof and Syfynwy tributaries is currently underway in partnership with the Environment Agency. All farms will be offered advice on

33 best land management practice and free soil testing to determine correct levels of fertiliser application. If appropriate, land bordering the SAC can be entered into a Living Rivers Agreement.

Management for all sea, river and brook lamprey is likely to be sympathetic.

The currently unfavourable condition assessment suggests that there may be adverse factors influencing these species and further survey work is required to gain a clearer picture of sea lamprey population .

5.2 Conservation status and management requirements of Features 2 & 3: Brook lamprey Lampetra planeri & River lamprey Lampetra fluviatilis

Conservation status

Status: Unfavourable: Unclassified.

Monitoring in 2004 showed the Afonyd Cleddau to have an overall mean density of Lampetra spp. 4.5 m-2 (sd ±0.8) when all habitats are taken into account. This does not meet the target of 5m -2 in the JNCC (2005) guidance.

For optimal habitat, the mean density of Lampetra spp. was 9.2 m -2 (sd ±1.2), which is below 10 m -2 target (JNCC, 2005).

When the sites in the catchment are considered individually (map 4.3.1), 16 of 34 (47%) optimal sites met the target to be considered favourable. The remaining 18 sites failed to reach the target.

For the sites within the SAC alone, the mean density of Lampetra spp. in optimal habitat was 9.5 m -2 (sd ±1.2) and 0 m -2 in sub-optimal habitat. The SAC wide mean (including all habitat) was 4.6 m -2 (sd ±0.8). Of the sites within the SAC, 16 of 33 (48%) met the optimal density target of 10 m -2.

However, it was not possible to distinguish between river and brook lamprey during monitoring, due to the reliance on juvenile stages (ammocoetes/transformers). The most recent survey by APEM in 2004 was conducted in October, possibly too late as transformers may have migrated from the silt. Transformers are required to distinguish between brook and river lamprey and if the survey is conducted too late, transforming adults may have already migrated (into the estuary for river lamprey and riffles / pools for brook lamprey).

There is a lack of evidence to gauge river lamprey numbers with few records of adult held on file. More information on the relative abundance of river lamprey in different parts of the Afonydd Cleddau SAC is desirable. Records of spawning adult river lamprey would be particularly useful.

Management requirements

The impacts of barriers to migration have been largely over come since installation of the fish passes at Haverfordwest and Canaston Bridge. Smaller weirs remain, on the Anghof, upper Eastern Cleddau, Vicars Mill on the Eastern Cleddau and there is also the Llys y Fran Dam on the Syfynwy, but these barriers are higher up the catchment, leaving much of the river accessible.

The extent and quality of suitable habitat for brook and river lamprey must be maintained. Elevated levels of fines (particles <0.83mm) within spawning substrates can interfere with egg survival. Spawning habitat consists of well-oxygenated gravel/pebble substrate of >10cm depth in a range of 34 water depths (0.2 to 1.5m). Sea and river lamprey tend to spawn in deeper water than brook lamprey. Nursery habitat consists of open-structured, aerated, silty and sandy substrates between 2 and 40cm depth generally in shallow (<0.5m) slack-water channel margins.

The 2005 APEM report describes optimal habitat [nursery areas] as areas identified with: • Several square metres of stable, fine sediment at least 150mm deep • Low water velocity • Shallow water depth • Organic detritus • Presence of shade The APEM report also describes sub-optimal habitat [nursery areas] as patchy, shallow sediment interspersed among coarser substrate with comparatively high velocity flow, more typically described as salmonid fry and parr habitat. All of the sub-optimal habitat sites contained at few square centimetres of silt or fine sand.

The impact of flow depletion downstream of a number of abstractions was assessed in the Review of Consents process. Abstractions that may have an impact on the features of the SAC have passed to stage 4 for options appraisal. The outcome of these assessments is awaited.

Entrainment in water abstractions directly impacts on population dynamics through reduced recruitment and survival rates. Information on likely rates of entrainment of lamprey ammocoetes is required before acceptable levels can be assessed.

The impact of lowered temperatures from the hypolimnial release at Llys y Fran on the Cleddau also has the potential to impact upon lamprey. The freshwater brook lamprey and anadromous river lamprey are temperature dependent at critical freshwater life stages. River and brook lamprey start to spawn in British rivers when water temperatures reach 10-11 oC, usually between March and April for river lamprey and March and May for brook lamprey. Distribution of lamprey within the Cleddau catchment is therefore also likely to be limited by the current river temperature regime.

In the Afonydd Cleddau catchment, the most significant sources of diffuse pollution and siltation are from agriculture, including fertiliser run-off, livestock manure, silage effluent and soil erosion from ploughed land. The most intensively used areas such as heavily trampled gateways and tracks can be especially significant sources of polluting run-off. Preventative measures can include surfacing of tracks and gateways, moving feeding areas, and separating clean and dirty water in farmyards.

If appropriate, land bordering the SAC can be entered into a Living Rivers Agreement for improvements such as stock exclusion and buffer strips, especially on reaches adjacent to intensively managed livestock grazing or arable land.

Other measures to control diffuse pollution in the water environment, including ‘Catchment Sensitive Farming’, may be implemented as a result of the Water Framework Directive and, along with existing agri-environment schemes, will help to achieve the conservation objectives for the SAC.

A pilot project looking at Catchment Sensitive Farming on the Deepford brook began in 2006/07 running through until the end of the 07/08 financial years. Deepford brook was chosen as a pilot in order to work on a predominantly dairy/intensive livestock catchment. The primary aim of the work was to investigate methods for reducing diffuse pollution coming from agricultural practice, and the response of the farming community to these methods and the interventions needed to undertake them. The way the project aimed to achieve these reductions was through provision of advice, support and financial grants to farmers/landowners in order to allow them to change aspects of their farm infrastructure or management in ways that will reduce run off and the potential of that run off to be loaded with pollutants such as soil, phosphorus, ammonia, sheep dip and organic material. The effectiveness of this scheme now needs to be assessed.

35

A trial project targeting all farms in the catchments of the Cartlett, Anghof and Syfynwy tributaries is currently underway in partnership with the Environment Agency. All farms will be offered advice on best land management practice and free soil testing to determine correct levels of fertiliser application. If appropriate land bordering the SAC can be entered into a Living Rivers Agreement.

Management for all sea, river and brook lamprey is likely to be sympathetic.

On-going monitoring will allow a better understanding of population fluctuations, distributional changes etc

5.3 Conservation status and management requirements of Feature 4: Bullhead Cottus gobio

Conservation status

Status: Unfavourable: unclassified

The current unfavourable status results from a lack of appropriate survey data.

Records obtained from ad hoc surveys show that bullhead are widespread in the main river and tributaries. There is a need for quantitative information on bullhead abundance.

Management requirements

Vertical drops of >18-20 cm are sufficient to prevent upstream movement of adult bullheads. New in stream structures should be avoided, whilst the impact of existing artificial structures needs to be evaluated.

The extent and quality of suitable bullhead habitat must be maintained. Elevated levels of fines can interfere with egg and fry survival. Spawning habitat is defined as unsilted coarse (gravel/pebble/ cobble) dominated substrate: males guard sticky eggs on the underside of stones. Larger stones on a hard substrate providing clear spaces between the stream bed and the underside of pebbles/cobbles are therefore important.

The importance of submerged higher plants to bullhead survival is unclear, but it is likely that where such vegetation occurs it is used by the species for cover against predators. Weed cutting should be limited to no more than half of the channel width in a pattern of cutting creating a mosaic of bare substrate and beds of submerged plants. Slack-water areas provide important refuges against high flow conditions. Suitable refuges include pools, submerged tree root systems and marginal vegetation with >5 cm water depth.

Bullheads are particularly associated with woody debris in lowland reaches, where it is likely that it provides an alternative source of cover from predators and floods. It may also be used as an alternative spawning substrate. Debris dams and woody debris should be retained where characteristic of the river/reach. Woody debris removal should be minimised, and restricted to essential activities such as flood defence.

Maintenance of intermittent tree cover in conjunction with retention of woody debris helps to ensure that habitat conditions are suitable. At least 50% high canopy cover to the water course/banks should be maintained, where appropriate. Some reaches may naturally have lower tree cover. Cover may also be lower in urban reaches.

36

Bullhead densities have been found to be negatively correlated with densities of non-native crayfish, suggesting competitive and/or predator-prey interactions. Non-native crayfish should be absent from the SAC.

The presence of artificially high densities of salmonids and other fish will create unacceptably high levels of predatory and competitive pressure on juvenile and adult bullhead. Stocking of fish should be avoided in the SAC.

Escapes from fish farms are a form of uncontrolled introduction and should be prevented by effective screening on all intakes and discharges.

Bullheads are relatively sedentary and interactions between populations in different parts of the catchment and in different catchments are likely to be limited, suggesting the existence of genetically discrete populations. Since they are of no angling interest, deliberate transfers between sites are unlikely to have been undertaken in the past, such that the genetic integrity of populations is likely to be intact. There should be no stocking/transfers of bullhead unless agreed to be in the best interests of the population.

In general, management for other SAC features is expected to result in favourable habitat for bullhead, through improvements in water quality and flow regime and maintenance of suitable physical habitat.

5.4 Conservation status and management requirements of Feature 5: European otter Lutra lutra

Conservation status

Status: Favourable: Maintained.

The conservation status of otters in the Afonydd Cleddau SAC is based on records of otter distribution, general riparian habitat quality, breeding records and current breeding habitat quality as outlined in the Performance Indicators.

Management requirements

The catchment is capable of supporting 11 breeding females on the Western Cleddau, and 8 breeding females on the Eastern Cleddau. This is determined by the number of existing breeding territories as identified by Jones, (2004).

Management should aim to ensure that there is sufficient undisturbed breeding habitat to support an otter population of a size determined by natural prey availability and associated territorial behaviour. Involvement of river users and land managers will be important in improving potential breeding habitat near to the river. Living Rivers Agreements, agri-environment schemes and the Better Woodlands for Wales scheme provide possible mechanisms for maintaining suitable sites, such as lightly grazed woodlands, areas of dense scrub, and tussocky fens with purple moor-grass.

There is the opportunity to increase the number of breeding sites through targeted management under the Living Rivers Scheme. Of an initial 78 breeding sites identified through a desk top study in 2004, 37 were considered sub-optimal. It was noted that this would not necessarily preclude breeding activity. A survey of these sites is required with an assessment of the potential for improvement to ‘optimal’ condition.

37

Food availability is an important factor. Fish biomass should stay within expected natural fluctuations. A potential problem appears to be the decline in eel populations.

Measures to ensure the safe movement of otters around the catchment will be promoted, in particular the ongoing provision of ledges, tunnels and fencing on new road bridge schemes. Where bridges are being repaired or replaced, or at especially bad locations for otter road deaths, such features may be retro-fitted.

5.5 Conservation status and management requirements of Feature 6: Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation

Conservation status

Status: Unfavourable: unclassified

Important stands of the habitat have been identified in the lower reaches of the Western Cleddau main river below Welsh Hook, at Wolf’s Castle and at Pont Llangwarren.

Further understanding of the distribution and status of this feature and its natural range within the Afonydd Cleddau SAC is required.

Management requirements

Factors that are important to the favourable conservation status of this feature include flow, substrate quality and water quality, which in turn influence species composition and abundance. Under conditions of prolonged low flows and high nutrient status, epiphytic algae may suppress the growth of aquatic flowering plants. Favourable management for this feature is therefore largely dependent on ensuring that sufficient depth, velocity and duration of flow and sufficiently low phosphate levels are maintained within the natural range of the vegetation.

The level of shading is a determining factor to the presence of this feature in many reaches. The Afon Rhyd Afallen and the Conin are two such stretches where communities are bryophyte dominated. On reaches where the feature is identified, some coppicing of bank side trees may be required.

Localised water quality issues can have an impact on the feature. There are a number of smaller sewage treatment works within the SAC, which can have a detrimental effect if not operating to a high standard.

The conservation objectives require that the area covered by the feature is stable or increasing within its natural range, which is likely to require catchment-wide measures to control diffuse pollution from agriculture, as the principal source of phosphate. Measures should be targeted initially at those reaches identified as holding important stands of this vegetation, units 1,3,7 & 10 and as a mechanism to improve the overall quality of the river, unit 7.

In the Afonydd Cleddau catchment, the most significant sources of diffuse pollution and siltation are from agriculture, including fertiliser run-off, livestock manure, silage effluent and soil erosion from ploughed land. The most intensively used areas such as heavily trampled gateways and tracks can be especially significant sources of polluting run-off. Preventative measures can include surfacing of tracks and gateways, moving feeding areas, and separating clean and dirty water in farmyards.

38

If appropriate, land bordering the SAC can be entered into a Living Rivers Agreement for improvements such as stock exclusion and buffer strips, especially on reaches adjacent to intensively managed livestock grazing or arable land.

Other measures to control diffuse pollution in the water environment, including ‘Catchment Sensitive Farming’, may be implemented as a result of the Water Framework Directive and, along with existing agri-environment schemes, will help to achieve the conservation objectives for the SAC.

A pilot project looking at Catchment Sensitive Farming on the Deepford brook began in 2006/07 running through until the end of the 07/08 financial years. Deepford brook was chosen as a pilot in order to work on a predominantly dairy/intensive livestock catchment. The primary aim of the work was to investigate methods for reducing diffuse pollution coming from agricultural practice, and the response of the farming community to these methods and the interventions needed to undertake them. The way the project aimed to achieve these reductions was through provision of advice, support and financial grants to farmers/landowners in order to allow them to change aspects of their farm infrastructure or management in ways that will reduce run off and the potential of that run off to be loaded with pollutants such as soil, phosphorus, ammonia, sheep dip and organic material. The effectiveness of this scheme now needs to be assessed.

A trial project targeting all farms in the catchments of the Cartlett, Anghof and Syfynwy tributaries is currently underway in partnership with the Environment Agency. All farms will be offered advice on best land management practice and free soil testing to determine correct levels of fertiliser application. If appropriate, land bordering the SAC can be entered into a Living Rivers Agreement.

Invasive non-native plants are a detrimental impact on this feature. Himalayan balsam and Japanese knotweed are problematic on the Afonydd Cleddau. A strategy to control these species must be developed in partnership with the Environment Agency.

More information is required on the natural range and distribution of this feature in the Afonydd Cleddau. Important examples of the feature may be present outside currently known locations. Sympathetic management will be promoted wherever the feature is present, if possible through the use of Living Rivers Agreements with land owners.

5.6 Conservation status and management requirements of Feature 7: Alluvial forests with Alnus glutinosa and Fraxinus excelsior ( Alno-Padion , Alnion incanae , Salicion albae )

Conservation status

Status: Unfavourable: Unclassified

A survey to map the complete distribution of the feature and collect summary condition data of the entire series of alluvial forest (>1 ha in area) within the Afonydd Cleddau cSAC was undertaken in 2003-2004 by the Wildlife Trust of South and West Wales (Jones, 2004). This was carried out in conjunction with a contract to assess the current and potential distribution, condition and breeding success of otter within the cSAC, the primary feature of notification. The aim of the survey was to provide a clear overview of the many areas of alluvial woodland present within the cSAC; not to provide a condition assessment of the feature. The survey data would then allow CCW condition monitoring effort to be efficiently directed toward a small set of woodlands representative of the series. A survey condition assessment proforma was provided by CCW to record site-specific details of each woodland compartment to inform selection of sites to be monitored and condition assessed (N.B. the data collated within each survey condition assessment proforma by contract survey does not provide evidence of the feature condition as favourable or unfavourable at any site or across the SAC despite claims made by the survey report that the feature was in favourable condition ). Unfortunately 39 when the survey data was field-tested in 2004 by T. Lovering and G. Wootton it was found to be often unreliable or inaccurate and therefore did not allow us to target sites for monitoring as had been the aim of survey or provide an accurate summary of condition across the series. Some of the sites did not meet the criteria of alluvial forest since ash formed the dominant canopy species rather than appearing as a component of the community. Other sites occupied elevated ground above the river system, which would not be subject to alluvial flooding. Given the limited time available for further survey CCW selected sites for SAC monitoring through re-surveying 2004 contract survey sites and including additional potential sites until we arrived at four suitable sites, on each arm, that could accurately be described as alluvial woodland.

Subsequent targeted monitoring provided SAC condition assessment based on site-specific performance indicators developed by Tracey Lovering (CCW SAC Monitoring Team). SAC condition assessment of the Alluvial woodland feature across the SAC required 3 out of 4 sites on each arm to pass individual condition assessments. Three sites failed: 2 from the Eastern Cleddau and 1 from the Western. Therefore the condition assessment is Unfavourable: Unclassified . The sub-category of Unclassified is provided since there was no previous data available for these sites with which a trend could be assessed.

In future years of monitoring CCW is likely to monitor a new set of 8 sites in the series of alluvial woodlands on the Cleddaus. This will provide greater information on individual sites and highlight site-specific management issues to bring the series into favourable condition. We will continue to assess the condition of the sites based on the same attributes/sub-attributes, with site-specific amendments. In this way we will gradually build up a database on all of the sites on the Cleddau, we will gain the actual extent of the feature and will be in a position to prioritise management decisions.

Selected sites with Condition Assessment Summary (P=Pass; F= Fail)

Eastern Cleddau: Henry’s Moat (P), Cotland Mill, Deepford Brook (P); Southfield Villa, Pont Crwca (F); Abystree (F); Western Cleddau: Esgyrn Bottom (P); Brimaston, Nant y Coy Brook (P); Wiston Mill, Cartlett Brook (P); Cuffern Bridge (F)

Site-specific management issues that led to assessment of site as Unfavourable

Southfield Villa: Limited associated ground flora, sparse ground cover; dense thickets of bramble 30- 80% (Target: Dense thickets of bramble <10%; confined to drier margins of habitat). Abystree: Canopy gap occupied by dense bramble with no evidence of saplings (Target: At least 2 saplings established in canopy gap (2-5m trees) (advance regeneration) but only alder, ash, willow i.e. no beech or sycamore) Cuffern Bridge: Dense thickets of bramble c. 7% in places (along woodland edge) (Target: D ense thickets of bramble <10% and confined to drier margins of habitat). Sycamore dominating canopy with rhododendron understorey (Targets: 50-90% of the canopy forming trees are alder; <5% of the canopy forming trees across the woodland are non-native; Exotics <5%).

Management requirements

Alluvial forests with Alnus glutinosa and Fraxinus excelsior (Alno-Padion , Alnion incanae , Salicion albae ) comprises woods dominated by alder Alnus glutinosa and willow Salix spp. on flood plains in a range of situations from islands in river channels to low-lying wetlands alongside the channels. The habitat typically occurs on moderately base-rich, eutrophic soils subject to periodic inundation.

Many such woods are dynamic, being part of a successional series of habitats. Their structure and function are best maintained within a larger unit that includes the open communities, mainly fen and swamp, of earlier successional stages. On the drier margins of these areas other tree species, notably

40 ash Fraxinus excelsior and elm Ulmus spp., may become abundant. In other situations the alder woods occur as a stable component within transitions to surrounding dry-ground forest, sometimes including other Annex I woodland types. These transitions from wet to drier woodland and from open to more closed communities provide an important facet of ecological variation. The ground flora is correspondingly varied. Some stands are dominated by tall herbs, reeds and sedges, for example common nettle Urtica dioica , common reed Phragmites australis , greater tussock-sedge Carex paniculata , and meadowsweet Filipendula ulmaria , while others have lower-growing communities with creeping buttercup Ranunculus repens , common marsh bedstraw Galium palustre , alternate- leaved golden-saxifrage Chrysosplenium oppositifolium and marsh-marigold Caltha palustris .

In the UK this Annex I habitat falls mainly within the following NVC types: h W5 Alnus glutinosa – Carex paniculata woodland h W6 Alnus glutinosa – Urtica dioica woodland h W7 Alnus glutinosa – Fraxinus excelsior – Lysimachia nemorum woodland h W2a Salix cinerea – Betula pubescens – Phragmites australis woodland, Alnus glutinosa – Filipendula ulmaria sub-community

Alder requires high light levels to regenerate from seed and will not, therefore, regenerate under a canopy. However, it readily self-coppices from the base as trunks fall. This ‘coppice’ re-growth is counted as regeneration in the performance indicators. At present, natural processes of trees falling and re-growing appear to be maintaining the required structural diversity across most of the site, but some coppicing might be required in areas where trees have not been falling down.

Excessive grazing can have a negative affect on natural regeneration and the ground flora of the sites, where livestock have access, fencing may be needed to control or preferably exclude livestock.

Some sites have non native species present, namely Rhododendron, Himalayan Balsam and Japanese Knotweed, and control of these will be required.

Where works are required a Living Rivers Agreement can be offered to the landowner.

Areas of new alluvial woodland are being established in areas of previous wet grasslands. This is a natural progression within the wetland communities.

Further survey work is required to assess the condition of the alluvial forests and management requirements on a site by site basis.

Alder root disease can have a devastating impact on alluvial forests. Coppicing the affected trees has been shown to prolong their life and this course of action will be taken when alder root disease is found in survey sites or on ad hoc site visits.

Alluvial woodlands don’t necessarily have to be wet and can occur on free draining soils. In these circumstances ash and oak can form a component of the canopy. However, most alluvial woodlands are also wet simply because these tend to be the areas that haven’t been cleared for other land uses. Wet Alluvial woodlands are at risk of drying out where artificial drains have been dug in the past which will allow species of drier habitats, notably bramble and ash, to take over. There is a risk of drier woodland communities taking over from the alluvial woodland in these areas. There may exist the possibility of blocking drains on some sites and new drains should be created without first seeking advice from CCW.

41

5.7 Conservation status and management requirements of Feature 8: Active raised bogs

Conservation status

Status: Unfavourable: declining

Primary (i.e. un-cut) mire occupies a limited area of the site, and appears to have been truncated by past drainage and peat cutting operations (Baird and Money, 1998). The primary mire edges display damage in the form of slumping and cracking, particularly along the northeast and northwest margins of the area. There is a general predominance of Calluna vulgaris and under-representation of Sphagna across the bog surface, which may be symptomatic of progressive dehydration, but long-term trends are still unclear. As such the overall condition of the primary raised mire should provisionally be considered to be unfavourable, declining

Raised mires are dependent upon a high and seasonally stable water table, together with an acidic water chemistry and low levels of plant nutrient availability, for both their development and maintenance. The chief factor affecting the raised bog vegetation is its hydrology. The construction of sluices on outflow ditches has been postulated as a means of countering the effects of peat cutting and drainage.

Raised mires are termed ombrotrophic, meaning that they are entirely dependent on atmospheric precipitation alone for both their water and nutrient inputs. Any nutrient enrichment by for example drift of agricultural inputs such as lime and herbicide/pesticide sprays may have a detrimental impact on the vegetation. Esgyrn Bottom is surrounded by steep wooded slopes which provide a suitable buffer against such occurrences. More insidious impacts could occur through pollution of groundwater, for example through intensification of agriculture. This threat should be addressed through maintenance of semi-natural vegetation and encouragement of good agricultural practice within the catchment area of the valley.

Fire, particularly if affecting extensive areas of the mire, may damage the hydrology of the site by destroying the microclimate amelioration and water holding capacity of the mire vegetation. As such, whilst loss of the vegetation cover may be short-lived, recovery to an active peat-forming state is likely to take a number of years or even decades. Fire episodes also increase the opportunity for the establishment of tree/shrub species and encourage the spread of fire tolerant competitive species notably Molinia . Measures should be taken to prevent fires.

Scrub encroachment is not currently thought to be a problem. Examination of aerial photographs suggests that there was some localised scrub expansion between 1971 and 1983, but further expansion was very limited between 1983 and 1992 (Baird & Money, 1998). Scrub largely comprises Salix cinerea and Alnus glutinosa aligned along ditch lines and other wet depressions, suggesting that current scrub distribution is influenced more by base-rich conditions than dehydration.

Grazing does not currently occur on the raised bog, but introduction of stock on to areas of secondary raised mire would help to control Molinia and scrub.

Management requirements

Grazing Grazing should not be necessary to keep the primary raised bog in good condition, but very light grazing may be of value on sites impacted by drainage. The secondary raised bog has been grazed in the past, and grazing by larger animals such as cattle, ponies or deer would have positive effects if re- 42 introduced. Grazing here should aim to keep the purple moor-grass tussocks in check, and create a mixture of moor-grass and other plants varying between ankle-height and knee-height.

Burning Although burning is sometimes used as a traditional method of rejuvenating areas of purple moor- grass, the bog here should not be burnt. The layer of Sphagnum moss and underlying peat would be damaged, and the growth of purple moor-grass encouraged. Accidental summer burns are particularly damaging, and an effort should be made to prevent these from occurring.

Scrub Cutting Scrub appears to be spreading across the secondary raised bog. The non-native rhododendron is a particular concern. Occasional cutting may be necessary to stop this from spreading further and shading out the native bog plants. Treatment of stumps with a suitable herbicide would be necessary to prevent re-growth.

Pollution Activities that could affect water draining on to the bog should be carried out carefully. Where possible, use of fertilisers or other chemical inputs on fields adjoining the bog should be limited. This will ensure a clean supply of water draining on to the bog margins. Any felling in the woodland should avoid causing silt problems. Aerial pollution has a damaging impact on sensitive bog plants, and originates from both local sources and further afield.

Drainage The raised bog is dependent on the maintenance of a natural drainage pattern. No new drainage systems should be put in place, and no pools should be created. A programme of ditch blocking and hydrological restoration is urgently required within an immediately adjacent to the raised bog and this will be progressed by CCW and relevant partners.

43

6. ACTION PLAN: SUMMARY

This section takes the management requirements outlined in Section 5 a stage further, assessing the specific management actions required on each management unit. This information is a summary of that held in CCW’s Actions Database for sites, and the database will be used by CCW and partner organisations to plan future work to meet the Wales Environment Strategy targets for sites.

Unit CCW Unit Name Summary of Conservation Management Issues Action Num Datab needed? ber ase Num ber 1 WC Lower The currently unfavourable condition assessment of river Yes 001009 main channel lamprey and seal lamprey suggests that there may be adverse & Camrose factors influencing these species and further survey work is required to gain a clearer picture of sea lamprey population. Investigation is required firstly at the Weir in Haverfordwest to assess migration passage up river. 2 WC Cartlett Diffuse pollution and sediment inputs from agricultural land Yes 001010 management have negative impacts upon water quality - the EA have identified this reach as having particularly poor water quality with no fish recorded during the latest round of monitoring.. Invasive species, notably Himalayan balsam and isolated stands of rhododendron are present in the unit and lead to a reduction in local biodiversity and in the case of Himalayan balsam, bank instability. Otters are present throughout the reach with two areas identified as potential breeding sites. There have been occasional accidental discharges and pollution events recorded in the unit. 3 WC Upper Diffuse pollution and sediment inputs from agricultural land Yes 001012 main channel management have negative impacts upon water quality Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach with an identified as potential breeding site at Priskilly forest. There have been occasional accidental discharges and pollution events recorded in the unit. 4 WC Rubaxton Diffuse pollution and sediment inputs from agricultural land Yes 001013 & Spittal management have negative impacts upon water quality Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach with identified potential breeding sites throughout the entire unit. 5 WC Nant y Diffuse pollution and sediment inputs from agricultural land Yes 001014 Bugail & Nant management have negative impacts upon water quality y Coy Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach with 2 identified potential breeding sites on the Nant Y Coy and one on the Nant y Bugail.

44

Unit CCW Unit Name Summary of Conservation Management Issues Action Num Datab needed? ber ase Num ber 6 WC Anghof Diffuse pollution and sediment inputs from agricultural land Yes 001015 management have negative impacts upon water quality. the reach has been recognised as having particularly poor water quality and is to be targeted by the EA under a CSF scheme. Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach with 2 identified potential breeding sites. there have been occasional pollution incidents, farming related reported on this reach. 7 WC Cleaddau Diffuse pollution and sediment inputs from agricultural land Yes 001016 & WC management have negative impacts upon water quality. headwaters Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach with potential breeding sites at Llangloffan Fen and Esgyrn Bottom. 8 EC Narberth Diffuse pollution and sediment inputs from agricultural land Yes 001017 & Pont Shan management have negative impacts upon water quality. Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach but no potential breeding sites have been identified. 9 EC Conin Diffuse pollution and sediment inputs from agricultural land Yes 001018 management have negative impacts upon water quality. Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. Otters are present throughout the reach but no potential breeding sites have been identified. 10 EC Lower The currently unfavourable condition assessment of both sea Yes 001020 main channel and river lamprey suggests that there may be adverse factors influencing these species and further survey work is required to gain a clearer picture of sea lamprey population. 11 EC Deepford Diffuse pollution and sediment inputs from agricultural land Yes 001021 & Cotland management have negative impacts upon water quality. The Deepford brook catchment sensitive farming scheme has been in operation but there has been limited uptake of streamside corridor fencing. Otters are present throughout the reach.

45

Unit CCW Unit Name Summary of Conservation Management Issues Action Num Datab needed? ber ase Num ber 12 EC Syfynwy Otters are present throughout the reach with identified Yes 001022 below potential breeding sites immediately below the reservoir and reservoir on the Rhyd y Brown. There has been one road death reported at Walton Mill. Diffuse pollution and siltation: Agricultural and forestry land management affects run-off from land and has negative impacts on water quality. Reductions in flows downstream of Llys y Fran may lead to drying out of lamprey spawning areas The Abstraction at Walton Mill has the potential to reduce levels and wetted perimeter within a 250m reach between the points of abstraction and discharge. This may impact upon lamprey habitat and may also hinder the migration of sea and river lamprey through this section. there is one further abstraction identified under the RoC process - a fish farm immediately below the reservoir - this has passed through to a stage 4 options appraisal. Invasive species, including Japanese knotweed are present throughout the reach. They suppress local biodiversity and can lead to bank instability. 13 EC Syfynwy Otters are present throughout the reach with an identified Yes 001023 above potential breeding site on the reach and further potential reservoirs breeding habitat throughout. Diffuse pollution and siltation: Agricultural and forestry land management affects run-off from land and has negative impacts on water quality. The abstractions on the Rosebush and Llys-y-Fran reservoirs have the potential to entrain juvenile brook lamprey. reductions in flows downstream of Rosebush may lead to drying out of brook lamprey spawning areas The reservoirs act as a barrier to migration of fish species, populations of bullhead would not be able to recolonise if wiped out by a pollution event. Some Japanese knotweed present in the top of the reach 14 EC Upper Otters are widespread and present throughout the reach with Yes 001024 main channel an identified potential breeding site at Rydwilym Diffuse pollution and siltation: Agricultural and forestry land management affects run-off from land and has negative impacts on water quality. There is an abstraction at Pont Hywel which may have an impact - this is progressing to stage 4 options appraisal with the EA 15 EC Afon Otters are widespread and present throughout the reach with Yes 001025 Rhyd Afallen an identified potential breeding sites located on both the Afon & Llanycefn Rhyd Afallen and the Llanycefn. Diffuse pollution and siltation: Agricultural and forestry land management affects run-off from land and has negative impacts on water quality. Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability.

46

Unit CCW Unit Name Summary of Conservation Management Issues Action Num Datab needed? ber ase Num ber 16 EC Otters are widespread and present throughout the reach with Yes 001026 Headwaters an identified potential breeding sites located at Glandy (EC) Bridge and Waunlwyd Diffuse pollution and siltation: Agricultural and forestry land management affects run-off from land and has negative impacts on water quality. Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. 17 EC Afon wern Otters are widespread and present throughout the reach Yes 001027 although no potential breeding sites have been identified. Invasive species, notably Himalayan balsam are present in the unit and lead to a reduction in local biodiversity and bank instability. 18 Llangloffan Otters are present throughout the unit with good identified Yes 001028 CCW section breeding habitat in the undisturbed and dense woodland / scrub areas. Diffuse pollution and siltation: Agricultural land management affects run-off from land, especially to the north and has negative impacts on water quality. the channel has been straightened and deepened in the past, management works have been undertaken to limit the drying of the terrestrial habitats and pools excavated in the location of historical meanders. There is excellent public access through the unit via a recently installed boardwalk. The unit is also an NNR and is managed according to a CCW management plan. 19a Llangloffan This unit is privately owned and a management agreement Yes 001029 central section with the landowner is in place. (Expires 20??) (south) 20 Llangloffan Otters are present in the unit with good identified breeding Yes 001030 WTSWW habitat throughout. section Diffuse pollution and siltation: Agricultural land management affects run-off from land and has negative impacts on water quality. The channel has been straightened and deepened in the past, the Wildlife Trust are proposing works to reintroduce meanders and water control measures to help stop the terrestrial habitats from further drying out. The Wildlife Trust is building a carpark on-site but outside the boundary of the SAC. Proposals are under development to introduce public access. The unit is also an NNR and is managed within the suite of WTSWW nature reserves. Tighter control over grazing is required to prevent banks from collapsing and associated sediment inputs, also to ensure more effective management of marshy grassland components of unit 24 Esgyrn Not SAC - details to be added No 001031 western section 25 Esgyrn NE Not SAC - details to be added No 001032 section

47

Unit CCW Unit Name Summary of Conservation Management Issues Action Num Datab needed? ber ase Num ber 26 Esgyrn SE Not SAC - details to be added No 001033 section 27 Esgyrn Hydrological investigations have revealed that the northern Yes 001969 Bottom core margin of the raised bog is being impacted by an old drainage ditch. Remediation work is planned here. Any grazing management proposals would require new fencing with attendent landscape issues. Grazing (with guanacas) only takes place on a small section on the northern edge of the bog - provided the hydrology of the bog functions naturally, growth of competitive species such as Molinia and Ulex species should remain limited and no grazing management of the primary raised mire should be required. Rhododendron is present around the margins of the primary raised mire, and should be eradicated. Past pollution from a dairy yard at Gelli has affected the western end of the raised mire, but the catchment is otherwise well buffered against run-off. Air pollution has the potential to impact on the low nutrient status of the mire surface. The site has not been burnt since the 1980s, but fire has the potential to damage the habitat. 22 Llangloffan There is a CCW management agreement in force on this unit No 002449 Jordanston (expires 20??) 92 Treffgarne No 002913 gorge SSSI 82 Cleddau SAC Otters are present throughout the reach with identified No 002914 & Wallis SSSI potential breeding sites throughout the entire unit. (2) there are issues concerning the SSSI management to be addressed later 58 Cleddau SAC Otters are present throughout the reach with identified No 002915 & Wallis SSSI potential breeding sites throughout the entire unit. (1) there are issues concerning the SSSI management to be addressed later 77 Cleddau SAC Otters are present throughout the reach with identified No 002916 & Wallis SSSI potential breeding sites throughout the entire unit. (4) there are issues concerning the SSSI management to be addressed later 19b Llangloffan No 005712 central section (north) 23 Llangloffan No 005713 Pencnwch

48

7. GLOSSARY

This glossary defines the some of the terms used in this Core Management Plan . Some of the definitions are based on definitions contained in other documents, including legislation and other publications of CCW and the UK nature conservation agencies. None of these definitions is legally definitive.

Action A recognisable and individually described act, undertaking or project of any kind, specified in section 6 of a Core Management Plan or Management Plan , as being required for the conservation management of a site.

Attribute A quantifiable and monitorable characteristic of a feature that, in combination with other such attributes, describes its condition .

Common Standards Monitoring A set of principles developed jointly by the UK conservation agencies to help ensure a consistent approach to monitoring and reporting on the features of sites designated for nature conservation, supported by guidance on identification of attributes and monitoring methodologies.

Condition A description of the state of a feature in terms of qualities or attributes that are relevant in a nature conservation context. For example the condition of a habitat usually includes its extent and species composition and might also include aspects of its ecological functioning, spatial distribution and so on. The condition of a species population usually includes its total size and might also include its age structure, productivity, relationship to other populations and spatial distribution. Aspects of the habitat(s) on which a species population depends may also be considered as attributes of its condition.

Condition assessment The process of characterising the condition of a feature with particular reference to whether the aspirations for its condition, as expressed in its conservation objective , are being met.

Condition categories The condition of feature can be categorised, following condition assessment as one of the following 2:

Favourable: maintained; Favourable: recovered; Favourable: un-classified Unfavourable: recovering; Unfavourable: no change; Unfavourable: declining; Unfavourable: un-classified Partially destroyed; Destroyed.

2 See JNCC guidance on Common Standards Monitoring http://www.jncc.gov.uk/page-2272

49

Conservation management Acts or undertaking of all kinds, including but not necessarily limited to actions, taken with the aim of achieving the conservation objectives of a site. Conservation management includes the taking of statutory and non-statutory measures, it can include the acts of any party and it may take place outside site boundaries as well as within sites. Conservation management may also be embedded within other frameworks for land/sea management carried out for purposes other than achieving the conservation objectives.

Conservation objective The expression of the desired conservation status of a feature, expressed as a vision for the feature and a series of performance indicators . The conservation objective for a feature is thus a composite statement, and each feature has one conservation objective.

Conservation status A description of the state of a feature that comprises both its condition and the state of the factors affecting or likely to affect it. Conservation status is thus a characterisation of both the current state of a feature and its future prospects.

Conservation status assessment The process of characterising the conservation status of a feature with particular reference to whether the aspirations for it, as expressed in its conservation objective , are being met. The results of conservation status assessment can be summarised either as ‘favourable’ (i.e. conservation objectives are met) or unfavourable (i.e. conservation objectives are not met). However the value of conservation status assessment in terms of supporting decisions about conservation management , lies mainly in the details of the assessment of feature condition , factors and trend information derived from comparisons between current and previous conservation status assessments and condition assessments.

Core Management Plan A CCW document containing the conservation objectives for a site and a summary of other information contained in a full site Management Plan .

Factor Anything that has influenced, is influencing or may influence the condition of a feature . Factors can be natural processes, human activities or effects arising from natural process or human activities, They can be positive or negative in terms of their influence on features, and they can arise within a site or from outside the site. Physical, socio-economic or legal constraints on conservation management can also be considered as factors.

Favourable condition See condition and condition assessment

50

Favourable conservation status See conservation status and conservation status assessment. 3

Feature The species population, habitat type or other entity for which a site is designated. The ecological or geological interest which justifies the designation of a site and which is the focus of conservation management.

Integrity See site integrity

Key Feature The habitat or species population within a management unit that is the primary focus of conservation management and monitoring in that unit.

Management Plan The full expression of a designated site’s legal status, vision , features , conservation objectives , performance indicators and management requirements. A complete management plan may not reside in a single document, but may be contained in a number of documents (including in particular the Core Management Plan ) and sets of electronically stored information.

Management Unit An area within a site, defined according to one or more of a range of criteria, such as topography, location of features , tenure, patterns of land/sea use. The key characteristic of management units is to reflect the spatial scale at which conservation management and monitoring can be most effectively organised. They are used as the primary basis for differentiating priorities for conservation management and monitoring in different parts of a site, and for facilitating communication with those responsible for management of different parts of a site.

Monitoring An intermittent (regular or irregular) series of observations in time, carried out to show the extent of compliance with a formulated standard or degree of deviation from an expected norm. In Common Standards Monitoring , the formulated standard is the quantified expression of favourable condition based on attributes .

Operational limits The levels or values within which a factor is considered to be acceptable in terms of its influence on a feature . A factor may have both upper and lower operational limits, or only an upper limit or lower limit. For some factors an upper limit may be zero.

Performance indicators The attributes and their associated specified limits , together with factors and their associated operational limits, which provide the standard against which information from monitoring and other sources is used to determine the degree to which the conservation objectives for a feature are being met.

3 A full definition of favourable conservation status is given in Section 4. 51

Performance indicators are part of, not the same as, conservation objectives. See also vision for the feature .

Plan or project Project: Any form of construction work, installation, development or other intervention in the environment, the carrying out or continuance of which is subject to a decision by any public body or statutory undertaker. Plan : a document prepared or adopted by a public body or statutory undertaker, intended to influence decisions on the carrying out of projects. Decisions on plans and projects which affect Natura 2000 and Ramsar sites are subject to specific legal and policy procedures.

Site integrity The coherence of a site’s ecological structure and function, across its whole area, that enables it to sustain the habitat, complex of habitats and/or the levels of populations of the species for which it is designated.

Site Management Statement (SMS) The document containing CCW’s views about the management of a site issued as part of the legal notification of an SSSI under section 28(4) of the Wildlife and Countryside Act 1981, as substituted.

Special Feature See feature .

Specified limit The levels or values for an attribute which define the degree to which the attribute can fluctuate without creating cause for concern about the condition of the feature . The range within the limits corresponds to favourable, the range outside the limits corresponds to unfavourable. Attributes may have lower specified limits, upper specified limits, or both.

Unit See management unit.

Vision for the feature The expression, within a conservation objective , of the aspirations for the feature concerned. See also performance indicators.

Vision Statement The statement conveying an impression of the whole site in the state that is intended to be the product of its conservation management. A ‘pen portrait’ outlining the conditions that should prevail when all the conservation objectives are met. A description of the site as it would be when all the features are in favourable condition .

52

8. REFERENCES AND ANNEXES

APEM Aquatic Scientists. 2005. Lamprey Survey on the Rivers Tywi, Teifi & Cleddau. Review of consents report No 7.

Grieve, N., Clarke, Caswell, S.B. & Newman, J.R. 2003. Macrophyte Surveys of the Cleddau Rivers and Selected Tributaries. CCW Contract Science Report No. 578

Henderson, Seaby and Somes. 2007. A review of the ststus of Salmon and Bullhead in eight SAC rivers. CCW Environmental Monitoring Report No 35.

JNCC. 2004. Common Standards Monitoring Guidance For Woodland Habitats. JNCC. Peterborough.

Jones. 2004. Current and potential distribution, condition and breeding success of the otter (Lutra lutra) in the Afonydd Cleddau catchments and condition mapping of Alluvial forests in the Afonydd Cleddau cSAC. Report produced by The Wildlife Trust of South and West Wales’ Water for Wildlife Team. CCW Report no.CCW/WA/31.

Jones & Jones. 2004. Otter Survey of Wales 2002. The Environment Agency Wales.

Jones and Parry An Assessment of the Conservation and Restoration of the Cleddau Catchment.

Lee Donaldson Associates. 1993. Western Cleddau Catchment River Corridor Survey (tributaries)

Lee Donaldson Associates. 1993. Eastern Cleddau Catchment River Corridor Survey (tributaries)

Liles, G. 2004. Current and potential distribution, condition and breeding success of the otter ( Lutra lutra ) on the Afon Teifi catchement area. CCW Environmental monitoring Report No. 5.

Lovering, T. 2005. Afonydd Cleddau SAC Monitoring Report: Alluvial Woodland 2004. Internal unpublished report.

Small, C. 1991. Western Cleddau River Corridor Survey.

53

ANNEX 1 – LAMPREY SURVEY SITES

Site No. Site Name W1 W.Cleddau, Upstream of road bridge W2 Cartlett Brook, Shoalshook Lane W3 Cartlett Brook, U/S of Penty Park Lodge W4 W.Cleddau, D/S of Camrose Brook W5 Camrose Brook, U/S Camrose Mill Bridge W6 Camrose Brook, D/S Camrose Mill Bridge W7 Rudbaxton Water, U/S of road bridge W8 W.Cleddau, U/S Treffgarne Bridge W9 Spittal Brook, Wood End, Spittal W10 Spittal Brook, Scollock Bill W11 Anghof, Beulah Bridge W12 W.Cleddau, Coed Ty-Newydd Grug W13 W.Cleddau, Priskilly Forest Footbridge W14 W.Cleddau, Pont Llangloffan W15 Cleddau, Pont Llanwarren W16 Bugail, New Bridge W17 Cleddau, Dolau Cottage W35 Millin Brook, Cooks Bridge E1 E.Cleddau, Narberth Brook confluence E2 Narberth Brook, Ford by East Atheston E3 Narberth Brook, Sewage Works E4 E.Cleddau, Pont Shan E5 E.Cleddau, Conin confluence E6 Syfynwy, Deepford Brook confluence E7 Deepford Brook, Road bridge E8 Syfynwy, Stepaside Bridge E9 Syfynwy, Rhyd Fawr Bridge E10 E.Cleddau, Glancleddau E11 Rhyd-a-fallen, Rhyd-a-fallen Bridge E12 E.Cleddau, Llwyn-dwfr Bridge E13 Llancefyn, Llancefyn Mill E14 E.Cleddau, Gors E15 E.Cleddau, Pont Hywel Bridge E16 Wern, Pont Mynachlogddu E17 E.Cleddau, Caermeini Ganol E18 Conin, Crug y deri

54

© Countryside Council for Wales. All rights reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Right (2012)

55

ANNEX 2 – 2001 MACROPHYTE SURVEY SITES (GRs are located at mid point of survey stretch) Site No Name GR WC1 Western Cleddau at Pont Llangloffan SM904319 WC2 Afon Cleddau: Trecoed to Nant y Bugail confluence SM935319 WC3 Western Cleddau at Welsh Hook SM934277 WC4 Afon Anghof at Puncheston SN008294 WC5 Afon Anghof at Sealyham SM968280 WC6 Western Cleddau at Wolfscastle SM957264 WC7 Spittal Brook upstream of Golden Hill SM986245 WC8 Western Cleddau at Treffgarne SM959229 WC9 Camrose Brook at Stock Park Farm SM908203 WC10 Knock Brook at Keeston Bridge SITE REJECTED – SM911188 UNSUITABLE WC11 Western Cleddau at Cutty Bridge SM941188 WC12 Carlett Brook upstream of Crundale level crossing SM981180 EC13 Afon Wern tributary SN122298 EC14 Eastern Cleddau at Waun Isaf SN144300 EC15 Eastern Cleddau downstream of Llangloman SN127262 EC16 Llanycefn tributary SN098244 EC17 Eastern Cleddau at Rhyd-y-Bil confluence SN106234 EC18 Rhyd Afallen tributary SITE REJECTED – UNSUITABLE SN086235 EC19 Rhyd y Brown / Ty Llosg tributary. (Relocated) SN063216 EC20 Syfynwy downstream of Southfield Villa SN043223 EC21 Syfynwy at Deepford Brook confluence SN075200 EC22 Eastern Cleddau at Llandre Bridge SN091204 EC23 Eastern Cleddau at Abystree SN075163 WC25 Treffgarne Gorge

EC19: Site was relocated slightly downstream of that originally chosen, which was outside the suggested SSSI / SAC boundary and located in a wooded area where shading may reduce aquatic macrophyte cover. New location is below wooded area and also below confluence with small trib entering from west on right bank.

© Countryside Council for Wales. All rights reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Right (2012) 56

ANNEX 3 – MAP OF ALLUVIAL WOODLAND LOCATIONS (Jones, 2004)

© Countryside Council for Wales. All rights reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Right (2012)

57

ANNEX 4 – DETAIL OF ESGYRN BOTTOM UNITS

© Countryside Council for Wales. All rights reserved. Contains Ordnance Survey Data. Ordnance Survey Licence number 100019741. Crown Copyright and Database Right (2012)

58

ANNEX 5 – SUMMARY OF THE LIVING RIVERS SCHEME

Objectives of the Rivers scheme As nutrient and sediment levels increase, deterioration of the SSSIs may occur in terms of changes in plant and animal communities, growth of harmful weed and algae and a decline in the species of interest. Agricultural sources may be one source for increased levels of nitrates and phosphates within the rivers, and may also increase the levels of sediment within the river system. Pesticides and herbicides that leach into the river can also cause pollution problems. A reduction in pollution from agricultural sources is therefore an objective for the scheme. In summary, the scheme will: • Create appropriate buffer zones/riverside corridors in order to safeguard and improve water quality and provide a sheltered corridor to benefit invertebrates, birds and mammals including otters. • Maintain and enhance natural habitats and features of the river by tree planting, pollarding, fencing and cutting of vegetation. • Safeguard and improve the habitat for populations of bullhead, brook, sea and river lamprey species, otters and water crowfoot beds. • Maintain and enhance existing wetland habitats, in particular wet woodlands and raised bog. • Promote the advantages to both wildlife and agriculture of sympathetic management practices. • Undertake a monitoring programme of the special features of the site .

59