Appendix 2 - Perth SWMP short list Options
Perth and Kinross Council · 27 May 2026
Back to Climate Change and Sustainability Committee — 27 May 2026 and its agenda
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Appendix 2 – Perth SWMP Options Table 1: Perth SWMP Options Long list Option 1: SuDS Attenuation, additional road drainage on Dupplin Road and Annat Road with a raingarden opposite Gannochy Pond. Option 2: Upper catchment attenuation and storage in fields opposite the Rohallion Centre. Option 3: Create a surface water route to the River Tay from the A93 through derelict land next to Conachar Court Retirement Living. Option 4: South Inch Terrace disconnections and SuDS Option 5a Kerb drainage and storm sewer upgrade on Oakbank Crescent and Oakbank Place. Option 5b SuDS Attenuation within Perth Academy grounds, with conveyance swale and road drainage on Fairies Road. Option 6: Lochie Brae and Bowerswell Road drainage Option 7: SuDS Attenuation within Millenium Park Option 8: Queens Avenue Option 9: Fairfield Avenue disconnections and SuDS Option 10: Wallace Crescent disconnections Option 11: Glenearn Rd - Inch View Primary disconnections Option 12a Rannoch Road drainage upgrade and SuDS feature within Newhouse Road roundabout. Kerb drainage along Rannoch Road between Newhouse Road and Letham Road roundabouts. Option 12b Kerb drainage along Rannoch Road between Letham Road and Unity Terrace roundabout, including periodic raingardens for interception and traffic calming. Option 13: SuDS Attenuation and rooftop disconnection at Whitefriars Industrial Park Option 14: Permeable pavement and SuDS attenuation at Dewars Centre and Perth Leisure Centre Option 15: City centre increase permeable surfaces Option 16: City Centre SuDS at North Inch Option 17: Muirton SuDS attenuation Option 18: Feus Rd/Unity Terrace disconnections and SuDS Figure 1: Long and short list locations across Perth - those highlighted blue were taken forward to short list. Appendix 2
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Table 2: Perth SWMP short list summary table Option ID Cluster Number Option Description Capital cost (including 60% optimism Bias) Total PV Benefits Benefit:cost ratio 1a 4 SuDS Attenuation, additional road drainage on Dupplin Road and Annat Road with a raingarden opposite Gannochy Pond. £145,622 - £ 12,327 0 2 4 Upper catchment attenuation and storage in fields opposite the Rohallion Centre. £189,201 - £ 11,212 0 3 4 Create surface water route to River Tay through derelict land using cascading swales and raingardens. £134,231 £ 5,927 0 5a 9 Kerb drainage and storm sewer upgrade at Oakbank Crescent and Oakbank Place. £171,180 £ 14,207 0.1 5b 9 SuDS swale and detention basin within Perth Academy grounds to intercept drainage before it reaches Oakbank Place. £156,299 £ 21,291 0.1 7 2 SuDS attenuation in Millennium Park. £467,409 £ 8,457 0 12a 22 Rannoch Road drainage upgrade and SuDS feature within Newhouse Road roundabout. Kerb drainage along Rannoch Road between Newhouse Road and Letham Road roundabouts. £399,633 £ 6,718 0 12b 56 Kerb drainage along Rannoch Road between Letham Road and Unity Terrace roundabout, including periodic raingardens for interception and traffic calming. £293,487 - £ 11,392 0 13 54 Whitefriars industrial rooftop disconnections. £412,647 £ 1,857,908 3.4 14 54 SuDS (infiltration and storage) Dewars Centre and Perth Leisure Centre £220,600 £ 694,204 2.2
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Option 13 Schematic – Whitefriars Sewer disconnections/SuDS Option 14 Schematic – Dewars/Perth Leisure Pool Sewer disconnections/SuDS