Wandle Trail Lighting Design Feasibility and Concept Report
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WANDLE TRAIL LIGHTING DESIGN FEASIBILITY AND CONCEPT REPORT FOR SUSTRANS AND LONDON BOROUGH OF MERTON 13TH JUNE 2016 STUDIO DEKKA CONTENTS INTRODUCTION REVIEW OF ECOLOGICAL FACTORS REVIEW OF HUMAN FACTORS OPTIONS STUDIES OTHER CONSIDERATIONS PRELIMINARY LIGHTING CONCEPT APPENDICES A: INVENTORY OF EXISTING LIGHTING APPARATUS B: ILLUMINANCE SURVEY NORTH OF PLOUGH LANE INTRODUCTION In February 2016, Sustrans commissioned Studio Dekka Limited to design lighting along several sections of the Wandle Trail, with a total length of approximately 2.15km along the River Wandle Section 1A in the London Borough of Merton. LB Wandsworth A new lighting scheme is required for Section 1 (from Trewint Street to Plough Lane) and Section 3 (from Mead Path to Garfield Road). The existing lighting to Section 2 (Plough Lane to Mead Path) needs to be upgraded to make it more ecologically sound. Section 1A forms part of the route from Trewint Street but is within the London Borough of Wandsworth. We propose to continue the Section 1 lighting for Section 1 northwards within this area. Trewint Street to Plough Lane Project Objectives 1. The lighting should make the path safe and comfortable for cycle and pedestrian use outside of daylight hours 2. The lighting must be in keeping with any ecological requirements specified. 3. The design should include an appropriate level of detail to fully inform the installation of lighting. 4. Indicative budget for all works to deliver the design including contingency but excluding fees is £200,000. The lighting will need to take into account the ecological requirements of habitats along the adjacent wildlife corridor, balancing this with reasonable user comfort for cyclists and pedestrians wishing to use the route at night time. The lighting design will be developed in a process analagous with RIBA Work Stages (2013). RIBA Stages 1 and 2 (April 2016) The current study investigates the feasibility of installing new lighting and explores strategies to accommodate both the ecological requirements of nocturnal wildlife and increased numbers of pedestrian and cyclist users. Section 2 Plough Lane to Mead Path Concept design options will be developed on the basis of this feasibility study. These options will be offered to consultation with key local stakeholders including the London Borough of Merton. RIBA Stage 3 (June 2016) Following the selection of a preferred design option, developed designs will be submitted for approval. Section 3 Mead Path to Garfield Road BRIEF OBJECTIVES Ecological Factors Human Factors The lighting must be designed to have a minimal impact on wildlife, particularly bats and fish. The ecological needs of the area need to be balanced with the user needs of the pedestrians and The lighting scheme should ensure that a dark corridor is preserved along this route that includes cyclists who wish to use the route outside of daylight hours. The designer should refer to Sustrans the river, surrounding vegetation and any features that could be used by roosting bats. An ecology TIN 29 Lighting of Cycle Paths for the required standards. report for the route is has been provided to the lighting designers. Vandalism Sustrans have undertaken a survey of the area and provide a map of all features along the route that could be used by roosting bats and the locations of sensitive habitats to inform light The design is to include a risk assessment regarding vandalism, and costings for repairs of damage placement, which must avoid these areas. The impact of construction on the ecology of the route due to vandalism. should also be considered as part of the development of the design. Consultation with Local Stakeholders The lighting specification should follow the recommendations from the Bat Conservation Trust. Sustrans is advised by LB Merton that any lighting works would be implemented under permitted The lighting design could include innovative strategies for designing lighting so as to be sensitive planning rights and that therefore planning permission will not be required for the introduction of to variations in nocturnal species activity at different times of day and seasonally (e.g. times lighting in the park. In addition to heritage and ecological requirements, there may be other local of year that bats and other relevant species hibernate/are less active) to reduce or mitigate any and statutory stakeholders (e.g. police) that Sustrans will need to consult regarding the suitability impacts. of lighting. Once the designs are at an initial design stage, stakeholders will be consulted for their input, and Sustrans will advise as to what input needs to be incorporated to The lighting design must: proceed to Detailed Design stage. - ensure no bat roosts are lit. Any products proposed will need to be agreed with the Green Space Manager as a key stakeholder. - minimise lightspill in general and in particular around important habitats such as the river. Illuminating the Bridge - minimise disturbance to wildlife using the site at dusk/dawn and during the night. As part of the improvements on the route, Sustrans intends to replace the bridge over the Wandle between the Wandle Meadow Nature Park and the Garfield Road ecreation Ground. The lighting at - minimise the area or habitat lost associated with installing the lighting equipment and this point needs to prevent the bridge from being a safety hazard in the dark. The lighting for the associated infrastructure, and with bringing the appropriate machinery onto site to do this. bridge will need to take into account ecological concerns regarding fish. This may mean that the bridge itself is not lit, but that the bollards at entry points are illuminated. - ensure no valuable habitats will be lost through installing the lighting or bringing machinery onto site. Power Supply and Maintenance - consider the need for measures to compensate for temporary and permanent habitat loss The Green Space Manager has expressed a strong preference for low maintenance lighting and associated with installing the lighting. if possible to avoid installing cabling, such that strong consideration should be given to the feasibility of stand-alone lighting units. This should be taken into account in the design. - include recommendations to minimise disturbance to wildlife from the temporary lighting of works compounds. From Sustrans (2016) Design Brief: Lighting for Riverside Path (Wandle), Wandle Meadow Nature Park & Garfield Recreation Ground, LB Merton. - include consideration of the need for future maintenance of the lighting and what impact that would have on habitats/species – and any mitigation/compensation required in association with those impacts. LIGHTING DESIGN APPROACH Our lighting design approach aims to accommodate the different ecological and human objectives identified in the brief. The lighting strategy should: - apply the the appropriate amount of illumination to the path to ensure safe and secure use by pedestrian and cyclists. - minimise light trespass into the wildlife corridor from path lighting, most especially around existing and potential bat roosts. - explore ways to minimise light trespass into the wildlife corridor from light sources controlled and operated by third parties. Wildlife Corridor Contained Contained Security Security Lighting Lighting Quietway Corridor REVIEW OF ECOLOGICAL FACTORS ECOLOGICAL SURVEYS Sustrans supplied an ecological survey of the area to inform the development of lighting designs. Updated Ecological Surveys For The Wandle Trail (2015) Richard Graves Associates. In summary, Richard Graves Associates’ report finds: - The bat activity survey recorded a considerable amount of activity along the route, particularly associated with the river Wandle and darker areas of the route. It will be necessary to carefully consider the impact of changes in lighting as a result of the proposals. - A number of trees were recorded as having higher bat roost potential and one confirmed tree TM roost was detected during the activity survey. None of the trees of higher potential are likely to be directly affected by the proposals. PROVIDING TRUSTED ECOLOGICAL ADVICE - The existing lighting conditions along the route are not optimum for wildlife, safety or encouraging use and are inconsistent along the route. - Locations of those species considered to be invasive close to the route were recorded. The invasive species Japanese knotweed and giant hogweed were recorded during the walkover. - No water bodies along the route are considered to be suitable for Greater Crested Newts and no records of this species were returned within 500 m were returned in the desktop study. UPDATED ECOLOGICAL SURVEYS FOR THE WANDLE TRAIL Consequently there are unlikely to be any impact on this species as a result of these proposals. - None of the proposed compound locations appear to have the potential to impact any sensitive habitats. From Richard Graves Associates (2015) Updated Ecological Surveys For The Wandle Trail. Orpington: Richard Graves Associates Limited. Project Prepared By Approved by Client Status Date RGA057 A.R. Graves CEcol CEnv A.R. Graves CEcol Sustrans Final August FCIEEM CEnv FCIEEM 15 Richard Graves Associates Ltd, Company Number: 7931959 Address: 10B Star Lane, Orpington, Kent, BR5 3LJ Tel: 020 32861419 E-mail: [email protected] www.richardgravesassociates.com ECOLOGICAL CONSTRAINTS Sustrans provide additional guidance specifically related to lighting design for the project area. Wandle Trail Merton: Summary of Lighting Constraints (2016) Sustrans. - The entire route is situated within an ecologically valuable corridor of semi-natural habitats. As such any changes to the lighting scheme must be sensitively designed and must follow the recommendations of Richard Graves Associates (2015) and best practice guidelines (BCT 2014). - A number of High Risk features and zones are present within the project area and are identified in drawings 2.1-2.5. They include trees or structures with features that could be used by roosting bats and areas of the river and bankside habitats that are clearly visible from the path. The lighting levels of high risk features and zones should not be increased from current light levels.