Comrie (Potentially Vulnerable Area 08/14)
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Comrie (Potentially Vulnerable Area 08/14) Local Plan District Local authority Main catchment Tay Perth and Kinross Council, River Earn Stirling Council Summary of flooding impacts Summary of flooding impacts flooding of Summary At risk of flooding • 510 residential properties • 100 non-residential properties • £2.0 million 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 Tay Local Plan District Section 2 164 Comrie (Potentially Vulnerable Area 08/14) Local Plan District Local authority Main catchment Perth and Kinross Council, Tay River Earn Stirling Council Background This Potentially Vulnerable Area is There are approximately 510 residential 168km2 (shown below). It is situated in properties and 100 non-residential the upper reaches of the River Earn properties at risk of flooding. The catchment and includes Comrie and Annual Average Damages are Crieff. The main watercourses are the approximately £2.0 million. River Earn, River Lednock and the Turret Burn. It also includes Loch Earn The majority of flood damages are and the Turret Reservoir. caused by river flooding. River 94% Surface water 6% Figure 1: Annual Average Damages by flood source © Crown copyright. SEPA licence number 100016991 (2015). All rights reserved. Summary of flooding impacts The highest risk of flooding is in Comrie from the River Earn and River Lednock and in Crieff from the Turret Burn. The risk of flooding to people, property, community facilities, utilities, the transport network, designated sites and agricultural land is summarised in Table 1. 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 A85 is also impacted at a number of locations. The location of the impacts of flooding is shown in Figure 3. The figures presented for Annual Average Damages include damages to residential properties, non-residential properties, transport and agriculture. 165 Section 2 Tay Local Plan District 1 in 10 1 in 200 1 in 1000 High likelihood Medium likelihood Low likelihood Residential properties 220 510 830 (total 4,800) Non-residential properties 50 100 120 (total 1,100) People 490 1,100 1,800 <10 Includes: <10 Includes: Community <10 Emergency emergency services emergency services facilities services and healthcare and healthcare facilities facilities Utilities assets <10 <10 10 Transport links 3 A roads, 2 B roads 3 A roads, 2 B roads 3 A roads, 2 B roads (excluding minor at 86 locations at 89 locations at 109 locations roads) Environmental designated areas 0.8 0.8 0.8 (km2) Designated cultural heritage 7 7 9 sites Agricultural land 2 5.6 8.2 9.9 (km ) Table 1: Summary of flooding impacts £60,000,000 £50,000,000 £40,000,000 Agriculture Vehicles £30,000,000 Roads Damages Non-residential £20,000,000 Residential £10,000,000 £0 1 in 10 1 in 50 1 in 100 1 in 200 1 in 1000 Figure 2: Damages by flood likelihood Tay Local Plan District Section 2 166 Figure 3: Impacts of flooding 167 Section 2 Tay Local Plan District History of flooding The area has a long history of flooding. The following notable floods have been recorded in this area: 19 November 2012: Approximately 150 properties were flooded in Dalginross from the Water of Ruchill. 27 August 2012: Approximately 60 properties were flooded in Dalginross from the Water of Ruchill. 19 February 1997: A number of streets and houses in Dalginross were flooded, as well as farm land and farm buildings. 16 January 1993: Widespread flooding across the Tay Catchment resulted in over £20 million of damage. The flooding is known to have affected Comrie. 2 February 1948: Telephone lines and power was disrupted within the Strathearn district when power lines were damaged. Two hundred acres of land were flooded. 22 January 1928: Wettest January on record at the time caused flooding across Perth and Kinross including Comrie and Crieff. The River Tay reached 5.77m above normal levels at Smeaton’s Bridge in Perth 8 November 1926: Flooding throughout the area due to the River Earn and tributaries rising up to a depth of 3.5m in some places. Gas works flooded in Comrie. Residential properties, shops and commercial properties also affected. January 1909: The road between Comrie and St Fillans at East Tullybannocher was reported to have five to seven feet of water over it due to snow melt. Farmlands at Carse of Trowan and Carse of Lennoch were under water. A lake reportedly formed between Comrie and Monzievaird. 17 March 1903: Railway infrastructure seriously affected causing major disruption to traffic after large stretch of embankment was washed away by flooding at New Comrie. Tay Local Plan District Section 2 168 Objectives to manage flooding in Potentially Vulnerable Area 08/14 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 Comrie Potentially Vulnerable Area. Reduce economic damages to residential and non-residential properties in Comrie caused by flooding from the River Earn and River Lednock Indicators: Target area: • £1.3 million Annual Average Damages from residential properties • £280,000 Annual Average Damages from non-residential properties Image found and displayed. Objective ID: 8033 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) Accept that significant flood risk in Dalginross is being managed appropriately. Maintain existing actions that reduce flood risk in Dalginross caused by flooding from the Water of Ruchill. Indicators: Target area: • 90 residential properties and one non-residential properties protected (100 year event) Image found and displayed. Objective ID: 8035 ©Crown copyright. All rights reserved. SEPA lic.no. 100016991 (2015) 169 Section 2 Tay Local Plan District Target area Objective ID Indicators within PVA Comrie Reduce the physical or disruption risk 8303 • 7.4km of road at 43 related to the transport network for roads locations on the A85 Applies across Avoid an overall increase in flood risk 8001 • 510 residential Tay Local Plan properties District • £2.0 million Annual Average Damages Applies across Reduce overall flood risk 8041 • 510 residential Tay Local Plan properties District • £2.0 million Annual Average Damages Applies across Organisations such as Scottish Water, Tay Local Plan energy companies and Historic District Environment Scotland actively maintain and manage their own assets, including the risk of flooding. These actions are not detailed further in the Flood Risk Management Strategies. Tay Local Plan District Section 2 170 Actions to manage flooding in Potentially Vulnerable Area 08/14 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 Comrie 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): FLOOD PROTECTION SCHEME/WORKS (80330006) Objective (ID): Reduce economic damages to residential and non-residential properties in Comrie caused by flooding from the River Earn and River Lednock (8033) Delivery lead: Perth and Kinross Council National: Within local authority: Priority: 7 of