Planning Response Form DCC REFERENCE: Stinting Lane, Shirebrook DCC CONTACT: Chris Rogers PLANNING REFERENCE: 14/00479/SCREEN LPA CONTACT NAME: Mr Steve Phillipson ADDRESS OF SITE: North Of Meadow Lane And West Of Stinting Lane Shirebrook DATE RECEIVED: 13/10/2014 DATE DUE: 03/11/2014 SURFACE WATER: A review of Derbyshire County Council (DCC) surface water model outputs indicate that the proposed site is likely to be subject to an isolated pocket of surface water flooding during the critical storm duration in the 1 in 100 year return period event in its current land use. The surface water is modelled to collect in a small area on the eastern boundary of the proposed site. When considering designing drainage systems for exceedence, the developer should consider rainfall events in excess of the 1 in 100 year return period to allow for extreme events. An analysis of the DCC surface water model outputs for the 1 in 1000 year critical storm duration rainfall event indicate that the site may be susceptible to further areas of surface water flooding following the same pattern as the 1 in 100 year event. DCC strongly promote Sustainable Drainage Systems (SuDS) to be incorporated within the design of a drainage strategy for any proposed development, applying the SuDS management train. The applicant is advised to contact the DCC Flood Team should any guidance on the drainage strategy for the proposed development be required. DCC encourages that site surface water drainage is designed in line with the current draft National SuDS Standards, including restricting developed discharge of surface water to greenfield runoff rates making suitable allowances for climate change and urban creep, managing surface water as close to the surface as possible and prioritising infiltration as a means of surface water disposal where possible. Regardless of the site’s status as greenfield or brownfield land, DCC encourages that surface water discharge from the developed site should be as close to the greenfield runoff rate as is reasonably practicable. Prior to designing the site surface water drainage, a full ground investigation should be implemented to fully explore the option of ground infiltration to manage the surface water in preference to discharging to a surface water body or public sewer system. It should be noted that DCC Flood Risk Management Team are not currently responsible for stipulating a surface water discharge rate for developments further to the advice given above. This should be agreed with the relevant Local Planning Authority. HISTORICAL DATA: DCC have received no reported historical incidences of flooding within the proposed site boundary. FLUVIAL DATA (ORDINARY WATERCOURSE AND MAIN RIVER WHERE APPLICABLE): DCC are not aware of any watercourses or drainage features within the site boundary. DCC strongly advise that prior to any development that land is checked/investigated for any watercourses/drainage features that may be present and/or hidden within the developable land. WATER FRAMEWORK DIRECTIVE/WATER ENVIRONMENT DATA: Under the Water Framework Directive (WFD), all water bodies should reach ‘good ecological status’ by 2015. No activities or works, including the proposed development, should deteriorate the status of any nearby watercourse as the main objectives for the WFD is to prevent deterioration in ‘status’ for all waterbodies. The ecological health of any receiving watercourse can be protected by the implementation of a SuDS scheme with an appropriate number of treatment stages that are appropriately maintained. Current WFD ecological status of all assessed water bodies is available on the EA website. A brief review of the county ecological information shows that there have been no reported ecological records within close proximity of the site. GROUNDWATER DATA: An analysis of the British Geological Survey (BGS) data is summarised below: The groundwater may be vulnerable to contamination therefore infiltrating water should be free of contaminants, Groundwater is likely to be more than 5 m below the ground surface throughout the year, Bedrock deposits are likely to be free-draining, Superficial deposits are absent and hence the permeability of the bedrock is likely to determine the drainage properties of the ground, The subsurface is likely to be suitable for free-draining infiltration SuDS, and Increased infiltration is unlikely to result in ground instability. It is recommended that a site specific ground investigation is undertaken for the site based on the review of the BGS data. OTHER RELEVANT INFORMATION AND COMMENTS: DCC do not hold any DG5 records for sewer flooding. Please contact your local water company for this information. Following the 2007 Pitt Review recommendation, Schedule 3 of the Flood and Water Management Act (2010) designated DCC as the SuDS Approval Body (SAB). Following the enactment of this legislation, DCC would be responsible for approving all construction with drainage implications and adopting any approved SuDS. However, Defra released a consultation on 12th September 2014 which outlined an alternative way of delivering SuDS through amendments to existing planning guidance. Depending on the outcome of this consultation, the SAB may not be required and Local Planning Authorities (LPAs) may have the duty to approve SuDS systems for new developments, with assistance from a range of consultees. This alternative solution may come into force in April 2015. DCC do not currently adopt any private SuDS schemes. As such, should a SuDS solution be proposed for this development, it should be confirmed prior to commencement of works who the responsible organisation for SuDS maintenance will be once the development is complete. The FWMA came into force in 2010 and designated DCC as a Lead Local Flood Authority (LLFA). As of the 6th April 2012 the FWMA transposed consenting powers under the Land Drainage Act to DCC (the LLFA), therefore any works in or nearby to an ordinary watercourse require consent from DCC. Upon receipt of any application (including the legislative fee) DCC has an 8 week legislative period in which to make a decision and either consent or object the proposals. If the applicant wishes to make an application for any works please contact Flood.Team@derbyshire.gov.uk . Derbyshire County Council holds a suite of information that can inform site development across Derbyshire. The information within this document has been interpreted and provided by an officer from the flood risk management team. Historical data has been collated from a range of sources and is anecdotal. The provision of this data is suggested to act as a guide only. Fluvial data has been provided by the EA however the applicant is advised to contact the EA for further information should the site lie within the floodplain of a Main River. Derbyshire County Council hold BGS data under a licenced agreement and therefore are not licenced to reproduce this information into the public domain. Derbyshire County Council have modelled surface water flooding for the whole of Derbyshire. The model output gives an indication of the broad areas likely to be at risk of surface water flooding and is intended to act as a guide only and cannot be used to identify specific properties at risk. Further information regarding the WFD, ecology and biodiversity should be obtained from the EA and Natural England. COMPLETED BY: Chris Rogers DATE: 16/10/2014 CHECKED BY: Ashley Dunn DATE: 16/10/2014 DATE SUBMITTED TO LPA: 16/10/2014