Appendix 3 – Flooding at Feus Road, Perth
Perth and Kinross Council · 31 May 2023
Back to Climate Change and Sustainability Committee — 31 May 2023 and its agenda
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Appendix 3 – Flooding at Feus Road, Perth Advantages • Works would protect properties from flooding up to the 1 in 30 year rainfall event – minor residual flooding would still occur (on the road carriageway); • Former Crieff Road nursery site could be re-used to provide below ground storage; • Removal of surface water from combined sewer system has wider benefits – reduced water treatment energy use/CSO spills; • Phased approach – could be delivered over multiple investment periods. Disadvantages • There will still be a risk of flooding to properties during rainfall events that exceed the design standard (the 1 in 30 year flood), although the works would reduce the frequency and total volume of flooding; • No allowance for increase in future flood risk due to the effects of climate change • High Capital cost (£10.7M) • Benefit cost ratio (0.54) is below 1 .0 – the estimated cost of the works therefore exceeds the potential benefits over time. The works are therefore not economically viable.