PPS 15 Planning and Flood Risk (Revised)·Page 43·Policy FLD 4
Policy FLD 4: Artificial Modification of Watercourses
Planning authorities will only permit artificial modification of watercourses, including culverting or canalisation, in exceptional circumstances: where short culverting is necessary for site access, or where specific lengths must be culverted for engineering reasons with no reasonable alternatives.
The planning authority will only permit the artificial modification of a watercourse, including culverting or canalisation operations, in either of the following exceptional circumstances:
• Where the culverting of short length of a watercourse is necessary to provide access to a development site or part thereof;
• Where it can be demonstrated that a specific length of watercourse needs to be culverted for engineering reasons and that there are no reasonable or practicable alternative courses of action.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 15 - Planning and Flood Risk (Revised).pdf