PSLP160 Severn Trent Water Amber Valley WCS All Sites V2.Pdf
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Amber Valley Potential impact of proposed developments on sewerage infrastructure assets Date 11/12/2017 NOTE: The purpose of these desktop based assessments are to indicate where proposed development MAY have a detrimental impact on the performanc e of the existing public sewerage network taking into account the size of the development proposals. For most new development provided the surface water in managed sustainably through use of a SuDS the additional foul only flows will have a negligible impact on existing sewer performance but where there are pre-existing capacity constraints additional capacity improvements may be required. Where subsequent detailed modelling indicates capacity improvements are required such work will be phased to align with development occupancy with capacity improvement works will be funded by Severn Trent Water. However, whilst Severn Trent have a duty to provide additional capacity to accommodate planned development, we also have a requirement to manage our assets efficiently to minimise our customers’ bills. Consequently to avoid potential inefficient investment we generally do not provided additional capacity until there is certainty that the development is due to commence. Where development proposals are likely to require additional capacity upgrades to accommodate new development flows it is highly recommended that potential developers contact Severn Trent as early as possible to confirm flow rates and intended connection points. This will ensure provision of additional capacity can be planned into our investment programme to ensure development is not delayed. Note : These are desktop assessments using readily available information and have not been subjected to detailed hydraulic modell ing Site Ref Site Na me Size Units Sewage Sewerage Comment Potential impact on Treatment sewerage Works infrastructure Catchment Known network constraints Assumed connectivity Surface water disposal Alfreton 17 Land at Lily Street 60 0 Developer ALFRETON There is no reported flooding Based on a review of topography, it is There is a water course running High (significant sized Farm, Derby Rd, supplied downstream of the proposed anticipated that a connection can occur through the site. Surface water development) Alfreton development. Due to the size of the via gravity into the existing system. should be managed on site through proposed development it is anticipated However, as a result of the large SUDs and any excess water that additional sewerage infrastructure development size, some pumping may discharged to the water course. would be required in order to be required. Connection to the existing combined accommodate the development. system undesirable. 58 Ld North of A38 and 300 Developer ALFRETON There is no reported flooding Based on a review of topography, it is There is a water course running Medium (size of South of Wingfield supplied downstream of the proposed possible that some pumping will be through the site. Surface water development) Rd development. Due to the size of the required. should be managed on site through development modelling may be required SUDs and any excess water to assess implications and any necessary discharged to the water course. capacity improvements. Connection to the existing combined system undesirable. 94 Land to the east of 250 Developer ALFRETON There is no reported flooding Based on a review of topography it There is a water course running Medium (size of Chesterfield Rd supplied downstream of the proposed appears some pumping will be through the site. Surface water development) Alfreton development. Due to the size of the required. There is existing sewerage should be managed on site through development modelling may be required infrastructure on the site that will need SUDs and any excess water to assess implications and any necessary to be considered. discharged to the water course. capacity improvements. Note: Site Connection to the existing combined located adjacent to Alfreton Sewage system undesirable. Treatment Works. 110 Off Outseats Drive, 6 Dwellings ALFRETON There is no known flooding downstream Based on a review of topography it is There is a water course ~200m from Low (subject to Alfreton (assumed of the site. Due to the size of the anticipated a connection can occur via the site. Surface water should be hydraulic modelling at a development, sewerage capacity not gravity into the existing system. There managed through SUDs and any confirmation) density, expected to be an issue provided surface is existing sewerage infrastructure on excess discharged to the existing 35 per water is managed sustainably and is not the site that will need to be considered. stormwater system present. ha). connected to the foul sewer. 112 Wingfield Road 281 Dwellings ALFRETON There is no reported flooding Based on a review o f topography, it is There is a water course running near Medium (size of Alfreton (assumed downstream of the proposed anticipated that a connection can occur to the site. Surface water should be development) at a development. Due to the size of the via gravity into the existing system. managed on site through SUDs and density, development modelling may be required any excess water discharged to the 35 per to assess implications and any necessary water course. Connection to the ha). capacity improvements. existing combined system undesirable. 115 Birchwood Way, 11 Dwellings ALFRETON No known flooding downstream of the Based on a review of topography, it is The nearest water course is ~1km Low (subject to Somercotes (assumed site. Due to the size of the development, anticipated a connection can occur via away. Surface water should be hydraulic modelling at a sewerage capacity not expected to be an gravity into the existing system. There managed through SUDs and any confirmation) density, issue provided surface water is managed is existing sewerage infrastructure on excess discharged to the existing 35 per sustainably and is not connected to the the site that will need to be considered. stormwater system present ha). foul sewer. Connection could possibly be (Alfreton). to Pye Bridge. Ambergate 67 Land at Lockwoods, 317 Developer AMBERGATE Reported external flooding downstream Based on a review of topography, it is There is a water course ~150m from Medium (size of Ripley Road, supplied of the site. Due to the size of the anticipated some pumping may be the site. Surface water should be development) Sawmills proposed development, modelling may required. managed through SUDs and any be required to assess implications and excess discharged to the water any necessary capacity improvements. course. Belper 2 Millfield, Mill Lane, 12 Developer BELPER No reported flood incidents downstream. Based on a review of topography, it is The site is located adjacent to a Low (subject to Belper, Derbyshire supplied Due to development size, sewerage anticipated a connection can occur via water course. Surface water should hydraulic modelling capacity not expected to be an issue gravity into the existing system. be managed through SUDs and any confirmation) provided surface water is managed excess discharged to the sustainably and is not connected to the watercourse. foul sewer. Note proximtiy to other devs e.g. Land at Hill Top Farm. 4 Sandbed Lane, 30 Developer BELPER Reported external flooding incidents Based on a review of topography, it is Nearest water course ~500m away. Medium (multipl e Bargate, Belper supplied downstream. Due to the size of the anticipated a connection can occur via Discharge to the existing combined flood incidents) development, sewerage capacity not gravity into the existing system. system undesirable. Surface water expected to be an issue provided surface should be managed through SUDs. water is managed sustainably and is not connected to the foul sewer. 5 Whitemoor Lane, 75 Developer BELPER No reported flooding incidents. Due to Based on a review of topography, it is There is a water course ~300m away Low (subject to Belper supplied development size, sewerage capacity not anticipated a connection can occur via .Connection to the existing combined hydraulic modelling expected to be an issue provided surface gravity into the existing system. system is undesirable. Surface water confirmation) water is managed sustainably and is not should be managed through SUDs. connected to the foul sewer. Note proximity to other dev of 75 units (Whitemoor Lane). 11 Adshead Ratcliffe 50 Developer BELPER No reported flooding incidents. Due to Based on a review of topography, it is This is a brownfield site with a water Low (subject t o Premises, Derby Rd, supplied the size of the development, sewerage anticipated some pumping may be course running through it. Surface hydraulic modelling Belper capacity not expected to be an issue required. There is existing sewerage water should be managed through confirmation) provided surface water is managed infrastructure on the site, as well as a SUDs and any excess discharged to sustainably and is not connected to the pumping station, that will need to be the water water course. foul sewer. considered. 18 Land at Far Laund, 400 Developer BELPER Due to development size modelling may Based on a review of topography, it is The site has an adjacent water Medium (size) Chesterfield Road, supplied be required to assess implications/ any anticipated a connection can occur via course. Surface water should be Belper necessary capacity improvements. gravity into the existing system. managed through SUDs and any Flooding cluster to the north of the dev; if excess discharged to the water there was a connection here , potential course. impact on sewage infrastructure adjusts to 'high'. 19 Land at Bullsmoor, 150 Developer BELPER No reported flooding downstream. Due Based on a review of topography, it is There is a nearby water course as Low (subje ct to Off Kilbourne Road, supplied to development size modelling may be anticipated a connection can occur via well as storm system. Surface water hydraulic modelling Belper required to assess implications/ any gravity into the existing system. should be managed through SUDs confirmation) necessary capacity improvements.