Ellon (Potentially Vulnerable Area 06/12) Local Plan District Local authority Main catchment North East Aberdeenshire Council River Ythan, Buchan coastal Summary of flooding impacts Summary of flooding impacts flooding of Summary At risk of flooding • 110 residential properties • 40 non-residential properties • £300,000 Annual Average Damages (damages by flood source shown left) Summary of objectives to manage flooding Objectives have been set by SEPA and agreed with flood risk management authorities. These are the aims for managing local flood risk. The objectives have been grouped in three main ways: by reducing risk, avoiding increasing risk or accepting risk by maintaining current levels of management. Objectives Many organisations, such as Scottish Water and energy companies, actively maintain and manage their own assets including their risk from flooding. Where known, these actions are described here. Scottish Natural Heritage and Historic Environment Scotland work with site owners to manage flooding where appropriate at designated environmental and/or cultural heritage sites. These actions are not detailed further in the Flood Risk Management Strategies. Summary of actions to manage flooding The actions below have been selected to manage flood risk. Flood Natural flood New flood Community Property level Site protection protection management warning flood action protection plans scheme/works works groups scheme Actions Flood Natural flood Maintain flood Awareness Surface water Emergency protection management warning raising plan/study plans/response study study Maintain flood Strategic Flood Planning Self help Maintenance protection mapping and forecasting policies scheme modelling North East Local Plan District Section 2 138 Ellon (Potentially Vulnerable Area 06/12) Local Plan District Local authority Main catchments River Ythan North East Aberdeenshire Council Buchan coastal Background This Potentially Vulnerable Area is The main river in the area is the Ythan, centred on Ellon. It is approximately which is tidally influenced downstream 19km2. of Ellon. The A920, A948, B9005 and a short There are approximately 110 residential section of the A90 pass through the and 40 non-residential properties at risk area. of flooding. The Annual Average Damages are approximately £300,000 with the majority due to river flooding. River 75% Coastal <1% Surface water 25% © Crown copyright. SEPA licence number 100016991 (2015). All rights reserved. Figure 1: Annual Average Damages by flood source Summary of flooding impacts The river flood risk comes from the River Ythan and its smaller tributaries, including Modley Burn and Broomies Burn. The risk of flooding to people and property, as well as to community facilities, utilities, the transport network, designated sites and agricultural land is summarised in Table 1. Roads at risk of flooding include the A920, A948 and A90. One school is at risk of flooding. Three designated cultural heritage sites and small areas of designated environmental sites are shown to be at risk. The damages associated with floods of different likelihood are shown in Figure 2. For this Potentially Vulnerable Area the highest damages are to residential properties followed by damages to non-residential properties. The location of the impacts of flooding is shown in Figure 3. 139 Section 2 North East Local Plan District 1 in 10 1 in 200 1 in 1000 High likelihood Medium likelihood Low likelihood Residential properties 40 110 160 (total 4,400) Non-residential properties 20 40 50 (total 4,200) People 90 230 350 Community <10 Educational <10 Educational 0 facilities buildings buildings Utilities assets <10 <10 <10 Transport links Roads at 40 Roads at 60 Roads at 70 (excluding minor locations locations locations roads) Environmental designated areas <0.1 <0.1 <0.1 (km2) Designated cultural heritage 2 3 3 sites Agricultural land 2 0.6 0.6 0.7 (km ) Table 1: Summary of flooding impacts1 Figure 2: Damages by flood likelihood 1 Some receptors are counted more than once if flooded from multiple sources North East Local Plan District Section 2 140 Figure 3: Impacts of flooding 141 Section 2 North East Local Plan District History of flooding There are two recorded floods from the Modley Burn in Ellon. In 2000 a wall collapsed, causing flooding. In 2002 the basements of property located on the culverted section of the burn flooded due to water backing up. In 2004, two properties in Findhorn Gardens flooded due to runoff from the adjacent housing development. In 2009 there was a flood from Broomies Burn, which affected Castle Way Industrial Estate, Ellon and damaged two bridges. Two industrial units and a school were affected. North East Local Plan District Section 2 142 Objectives to manage flooding in Potentially Vulnerable Area 06/12 Objectives provide a common goal and shared ambition for managing floods. These objectives have been set by SEPA and agreed with flood risk management authorities following consultation. They were identified through an assessment of the underlying evidence of the causes and impacts of flooding. Target areas have been set to focus actions; they do not necessarily correspond to areas at risk in SEPA’s flood map. The objectives below have been set for Ellon Potentially Vulnerable Area. Reduce flood risk in Ellon from the River Ythan Indicators: Target area: • 80 people • £58,000 Annual Average Damages from residential properties • £6,200 Annual Average Damages from non- residential properties Image found and displayed. Objective ID: 601201 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) Reduce flood risk in Ellon from the Modley Burn Indicators: Target area: • 80 people • £80,000 Annual Average Damages from residential properties • £20,000 Annual Average Damages from non-residential properties Image found and displayed. Objective ID: 601202 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) 143 Section 2 North East Local Plan District Reduce flood risk in Ellon from the Broomies / Bronie Burn Indicators: Target area: • £4,100 Annual Average Damages from residential properties • £37,000 Annual Average Damages from non-residential properties Image found and displayed. Objective ID: 601203 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) Target area Objective ID Indicators within PVA Applies across Avoid an overall increase in flood risk 600001 • 110 residential North East properties Local Plan • £300,000 Annual District Average Damages Applies across Reduce overall flood risk 600002 • 110 residential North East properties Local Plan • £300,000 Annual District Average Damages Applies across Organisations such as Scottish Water, North East energy companies and Historic Local Plan Environment Scotland actively maintain District and manage their own assets, including the risk of flooding. These actions are not detailed further in the Flood Risk Management Strategies. North East Local Plan District Section 2 144 Actions to manage flooding in Potentially Vulnerable Area 06/12 Actions describe where and how flood risk will be managed. These actions have been set by SEPA and agreed with flood risk management authorities following consultation. Selection of actions to deliver the agreed objectives was based on a detailed assessment and comparison of economic, social and environmental criteria. The actions shaded and then described below have been selected as the most appropriate for Ellon Potentially Vulnerable Area. Selected actions Flood Natural flood New flood Community Property level Site protection protection management warning flood action protection plans scheme/works works groups scheme Flood Natural flood Maintain flood Awareness Surface water Emergency protection management warning raising plan/study plans/response study study Maintain flood Strategic Flood Planning Self help Maintenance protection mapping and forecasting policies scheme modelling Action (ID): NEW FLOOD WARNING (6000020010) Objective (ID): Reduce overall flood risk (600002) Delivery lead: SEPA Status: Not started Indicative delivery: post 2021 Description: The area under consideration includes properties affected by flooding from the River Ythan. Full scoping will be required before a flood warning service can be developed and implemented in this area and further assessment will help to determine appropriate timescales for delivery. Action (ID): FLOOD PROTECTION STUDY (6012010005) Objective (ID): Reduce flood risk in Ellon from the Broomies / Bronie Burn (601203) Reduce flood risk in Ellon from the Modley Burn (601202) Reduce flood risk in Ellon from the River Ythan (601201) Delivery lead: Aberdeenshire Council National: Within local authority: Priority: 55 of 168 1 of 12 Status: Not started Indicative delivery: 2016-2021 Description: A flood protection study is required to consider flood protection works to reduce the risk of flooding in Ellon from the River Ythan, Modley Burn and Broomies / Bronie Burn. The flood protection study should focus on direct defences, online/offline storage, natural flood 145 Section 2 North East Local Plan District management (sediment management - especially on Modley Burn and Broomies Burn), modification of conveyance on the Broomies Burn, relocation of properties and property level protection to reduce the risk of flooding. Any other actions may also be considered to develop the most sustainable range of options. Potential impacts Economic: The study could benefit 77 residential and 18 non-residential properties at risk of flooding in