Yorkshire Water
"The Infrastructure Planning Commission Temple Quay House Temple Quay Bristol BS1 6PN Your Ref: IPC Reference: TR040001 Our Ref: M004764 Land and Planning Yorkshire Water Services Ltd P.O Box 500 Western House Western way Bradford BD6 2LZ Tel: (01274) 691111 Fax: (01274) 692643 E-mail stephanie.walden@yorkshirewater.co.uk For telephone enquiries ring: Stephanie Walden on (01274) 692349 23rd August 2011 Dear Sir/Madam, North Doncaster Chord - Proposed railway track and associated works Thank you for consulting Yorkshire Water on the above application. We have now reviewed the Mott MacDonald report, May 2011 - North Doncaster Chord ES - 4.1 Volume 1 and have the following comments:- Protection of Groundwater In general the Environmental Statement has adequately assessed the risk to groundwater, from the proposed development. The report correctly observes that the site lies within the Source Protection Zone 3 for the Doncaster groundwater sources. Section 7.13.2.1. of the ES States: "The Sherwood Sandstone Principal Aquifer underlies the entire site, although across much of the site it is confined by negligibly permeable superficial deposits. Contamination of the aquifer through the migration of contaminants will be reduced through the implementation of a Pollution Incident Control plan. Piling is to be undertaken according to Network Rail standards and “Piling into contaminated sites” (Environment Agency, 2002) guidance note. Although a Source Protection Zone 3 (total catchment) is present under the south east part of the site, it does not extend under the area where piling is to be undertaken. Therefore, the aquifer is of moderate value in this area. Any impacts on the Sherwood Sandstone will be temporary and not significant." It should be noted that where a site partially lies within a Source Protection Zone, the convention is to treat the entire site as though it was within the SPZ. Therefore, for any piling carried out on the site, the risk to the underlying aquifer, and the public water supply goundwater abstractions should be assessed and suitable mitigation measures should be in place prior to permission being granted. It is also worth noting that the Sherwood Sandstone is a Principal Aquifer, (as stated in the excerpt above) and as such the entire aquifer is considered to be of high value as a primary source of potable water. Therefore, any impacts on the aquifer, however temporary should be considered significant. I strongly recommend that the Environment Agency is consulted with specific regard to the protection of the aquifer. Protection of Water Supply Infrastructure In an earlier pre-application consultation we highlighted the fact that Company records indicate water mains cross parts of the red line site boundary, as shown on the enclosed plan. The presence of the mains may affect the layout of the site and therefore I consider it to be a material consideration in the determination of this application. A 4" diameter water main crosses the site at both Joan Croft Lane and at Honey Lands Lane crossings. No obstruction should encroach within 3 metres on either side of the mains i.e. protected strip widths of 6 metres per water main. Yorkshire Water has a legal document which protects one of these pipes from such development (deed no.17231). The exact line of the mains will have to be determined on site under Yorkshire Water Services supervision. The mains could be diverted under s.185 of the Water Industry Act 1991 to accommodate the new track crossing points. These works would be carried out at the developer's expense. It is in the developer's interest to agree such measures well in advance of commencement on site to avoid any delays to the scheme. I suggest that a condition similar to that suggested below is attached to a Development Consent Order:- Unless otherwise agreed in writing by the local planning authority, no building or other obstruction shall be located over or within 3 metres either side of the centre line of each of the water mains i.e. total protected strip widths of 6 meters per water main, that cross the site. (In order to allow sufficient access for maintenance and repair work at all times) For further information and advice, the Distribution Asset Manager should be contacted at the following address: The Water Business Unit (Distribution Assets South/South East), Thorncliffe Hall/Area Office, Newton Chambers Road, Thorncliffe Park, Chapeltown, Sheffield, South Yorkshire S35 2PQ. I trust the above is helpful but if you require further information, please do not hesitate to contact me a the above address. Yours faithfully Stephanie Walden Land Use Planning Manager"