The Daventry International Rail Freight Interchange Alteration Order 2014

Flood Risk and Surface Water Drainage

22.  The rail embankment within the floodplain to the west of the A5 (Works No. 2(a)) must not be commenced until the detailed design of the Clifton Brook rail embankment crossing structure has been submitted to, and approved in writing by, the relevant planning authority. The elements of the authorised development which encroach or impact upon the Clifton Brook Tributary must not be commenced until such time as the detail of the relevant bridging structure and flow control structure have been submitted to and approved in writing by the relevant planning authority. The details must also include:

(a) the Clifton Brook Tributary flow control structure, which must be constructed in accordance with the details shown within the Flood Defence Consent UT201100216 or other details agreed in writing by the relevant planning authority;

(b) the 3 bridges (bridleway, footbridge and maintenance) over the Clifton Brook Tributary; except for the footbridge over the flow control structure these must be clear span bank top to bank top structures and must be constructed in accordance with the details shown in Documents 2.11A, 2.11B and 2.11C or other details agreed in writing by the relevant planning authority;

(c) the Clifton Brook rail embankment crossing which must be a clear span structure (Armco arch or similar) with the soffit level above the channel set a minimum of 600 millimetres above the 1:100yr plus 20% (for climate change) flood level; and

(d) the access bridge over the Clifton Brook which must be a clear span bank top to bank top structure in accordance with the details shown on Document 2.11D or other means of access to be agreed in writing by the relevant planning authority.

The structures must be implemented as approved or in accordance with any variation to the approved details agreed in writing by the Environment Agency or lead local flood authority, following consultation with the relevant planning authority. Items (a) and (b) must be fully operational, prior to the occupation of any element of the authorised development which encroaches or impacts upon the Clifton Brook Tributary.