| Informative Notes: | | 1
)1. Culverting of existing watercourses will not be permitted.
2. We will require a full set of calculations, providing evidence of all surface water retained on site for the 1 in 100 (+40%CC). Any exceedance should be shown with pathways with maximum depths and velocity.
3. Any watercourses within or adjacent to the site should be included in the maintenance and management plan, even if there is no discharge to them. This would be a riparian ownership issue but leaving it as such is no longer acceptable.
4. We will require full drainage drawings showing all connections, control features, storage, inverts etc. and how it communicates with the development wide scheme.
5. Under Central Bedfordshire Council and IDB bylaws, any watercourse within or adjoining the site boundary will maintain a 9m development free easement (on the development side), unless otherwise agreed with the relevant drainage authority. This applies to all watercourses, where water is present for all or some of the year, including those not clearly stated on mapping, topography or planning documents.
6. All roads/paths will be included in the SuDS maintenance and management plan which will present who is responsible for what.
7. The final detailed design including proposed standards of operation, construction, structural integrity and ongoing maintenance must be compliant with the 'Non-statutory technical standards for sustainable drainage systems' (March 2015, Ref: PB14308), 'Central Bedfordshire Sustainable Drainage Guidance' (Adopted April 2014, Updated May 2015), and recognised best practise including the Ciria SuDS Manual (2016, C753).
8. Land drainage Consent under the Land Drainage Act 1991 must be secured to discharge surface water to an existing watercourse/ditch, and details of this provided with the full detailed design. An easement should be provided on the developable side of the watercourse to allow for access for maintenance, this should be 9m but may depend on the maintenance requirements considered appropriate.1. Culverting of existing watercourses will not be permitted.
2. We will require a full set of calculations, providing evidence of all surface water retained on site for the 1 in 100 (+40%CC). Any exceedance should be shown with pathways with maximum depths and velocity.
3. Any watercourses within or adjacent to the site should be included in the maintenance and management plan, even if there is no discharge to them. This would be a riparian ownership issue but leaving it as such is no longer acceptable.
4. We will require full drainage drawings showing all connections, control features, storage, inverts etc. and how it communicates with the development wide scheme.
5. Under Central Bedfordshire Council and IDB bylaws, any watercourse within or adjoining the site boundary will maintain a 9m development free easement (on the development side), unless otherwise agreed with the relevant drainage authority. This applies to all watercourses, where water is present for all or some of the year, including those not clearly stated on mapping, topography or planning documents.
6. All roads/paths will be included in the SuDS maintenance and management plan which will present who is responsible for what.
7. The final detailed design including proposed standards of operation, construction, structural integrity and ongoing maintenance must be compliant with the 'Non-statutory technical standards for sustainable drainage systems' (March 2015, Ref: PB14308), 'Central Bedfordshire Sustainable Drainage Guidance' (Adopted April 2014, Updated May 2015), and recognised best practise including the Ciria SuDS Manual (2016, C753).
8. Land drainage Consent under the Land Drainage Act 1991 must be secured to discharge surface water to an existing watercourse/ditch, and details of this provided with the full detailed design. An easement should be provided on the developable side of the watercourse to allow for access for maintenance, this should be 9m but may depend on the maintenance requirements considered appropriate. |
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