The Woodsmith Project - S73 Project Amendments : Planning Statement
Condition Number
Current Wording
Proposed Amendment
principles (described in Section 6 and outlined in Appendix A of the FRA) and an assessment of the hydrological and hydro-geological context of the development, has been submitted to and approved in writing by the Local Planning Authority. The Scheme shall demonstrate that surface water run-off generated up to and including the 1 in 100 critical storm will not exceed the run-off from the undeveloped site following the corresponding rainfall event. The Scheme shall include: a. Confirmation that the drainage scheme is to be built first to help minimise run-off from bare ground and to reduce any possible siltation of watercourses. It must also be in accordance with Part 3, Chapter 15, Appendix 15.10 of the MTS Surface Water Drainage, Basis of Concept Design. b. Surface water discharge rates from the impermeable areas of the site are to be limited to greenfield Qbar flows as calculated in Section 6 of the submitted Baseline Hydrological Assessment. c. During the Construction phase flows shall be attenuated up to and including the 1 in 20 event. d. Any landscaped areas that are draining to a swale must do so upstream of a check dam. e. During the Operational phase the SuDS attenuation features will remain the same size as during the construction phase. Due to the decrease in impermeable area these features must then attenuate flows up to and including the 1 in 100 event plus climate change event. Flow rates will still be restricted to greenfield Qbar flows during this time. f. Details of how the surface water drainage system will be maintained and managed throughout the lifetime of the development, including the construction phase. This must
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