Planning – Application Comments

Consultation Date: Fri 10 Feb 2023

Comment Date: Mon 03 Apr 2023

PLYMOUTH CITY COUNCIL CONSULTEE COMMENTS FOR PLANNING APPLICATION

APPLICATION SUMMARY
PLANNING APPLICATION: 23/00122/FUL
ADDRESS: Ridgeway, Plympton, Plymouth PL7 1FQ
DESCRIPTION: Retaining wall.

CASE OFFICER: Macauley Potter (Planning Officer)
Development Management, PCC Strategic Planning & Infrastructure, Floor 2 Ballard House PL1 3BJ

CONSULTEE: Gary Lester (Transport Officer)
PCC Strategic Planning & Infrastructure, Transport Planning Team, Floor 2 Ballard House PL1 3BJ

Date: 3rd March 2023

COMMENTS:
The Local Highway Authority (LHA) would not wish to raise any objections in principal to the proposed erection of what would be a privately owned Modular Retaining Wall structure of approximately 83 metres in length. Situated adjacent to the rear edge of the footway along the north side of The Ridgeway, adjacent/below part of the south end of St Maurice View.

Referring to the application details, the Modular Retaining Wall would comprise of galvanised steel King-posts fixed into the ground and spaced at 2000mm apart, infilled with concrete plank-type (RC) panels. The retaining wall would vary in height between 1000 ' 2000mm along its length, and have granular backfill and drainage at the back of the wall to relieve hydrostatic pressure. The concrete fence panels are proposed to be clad with brick slips, using 'Fosroc Nitotile C2' adhesive, or similar to fix the brick slips in place.

It is understood that Modular Retaining Wall Structures are designed based on assumed loading, for average ground conditions and soil type, with in this case the submitted details seemingly being the indicative manufactures specification, based on just that. But modular retaining wall designs also need to take account of local ground conditions and loading, aspects that need to be established and certified by a qualified Structural Engineer. Therefore further details are required to be submitted to the LPA to confirm that the proposed retaining wall would be fit for purpose given the local ground conditions. By way of an appropriate Design & Check Certificate confirming that the design and assessment is accurate, has been checked and is fully in compliance with the requirements of Approval In Principal (AIP), in accordance with the Design Manual for Roads and Bridges (DMRB),

The construction of the retaining wall would be likely to impact on the highway and require closure of the adjacent footway, with appropriate traffic management arrangements to be agreed with Plymouth Highways, along with the need to obtain an Access to Site Permit prior to any work starting.

SUMMARY:
The LHA would not wish to raise any objections in principal to the proposed erection of what would be a privately owned Modular Retaining Wall of approximately 83 metres in length, subject to confirmation by a Structural Engineer that the retaining wall has been designed to meet the requirements of the local ground conditions and loading and would be fit for purpose. It is recommended that the following conditions are included in any grant of planning permission: -

FURTHER DETAILS
() No development shall take place until details of the following aspects of the development have been submitted to and approved in writing by the Local Planning Authority; Certification by a Structural Engineer by the submission of an appropriate Design & Check Certificate for the proposed retaining structure confirming that the design and assessment is accurate, has been checked and is fully in compliance with the requirements of the Approval in Principal (AIP) procedure in accordance with the Design Manual for Roads and Bridges (DMRB). The works shall conform to the approved details.

Reason:
To ensure that these further details are acceptable to the Local Planning Authority, that the retaining wall structure would meet the requirements of the local ground conditions and loading and would be fit for purpose. In the interest of public and highway safety; in accordance with Policy DEV29 of the Plymouth and South West Devon JLP March 2019.


CODE OF PRACTICE DURING CONSTRUCTION
() Prior to the commencement of the development hereby approved, a detailed management plan for the construction phase of the development including construction traffic management shall be submitted to and approved in writing by the Local Planning Authority. The development shall be constructed in accordance with the management plan.

Reason:
To protect the residential and general amenity of the area from any harmfully polluting effects during construction works and avoid conflict with Policy DEV29 of the Plymouth and South West Devon JLP March 2019.


HIGHWAY DILAPIDATION SURVEY
() No works shall commence on-site until the applicant has undertaken a highway dilapidation survey in consultation with the Local Highway Authority. The survey shall assess the existing condition of all highway infrastructure adjoining the site along The Ridgeway that is likely to be impacted upon through the construction activities associated with the development hereby approved.

REASON
To ensure that any damage to the existing highway infrastructure arising from the construction of the proposed development is properly recorded and addressed by the developer on completion of the works in the interests of the safety of all users of the highway in accordance with Policy DEV29 of the Plymouth and South West Devon JLP March 2019.


INFORMATIVE: ACCESS TO SITE PERMIT
() Before any construction works start it will be necessary to secure an Access to Site Permit from the Local Highway Authority. The applicant should contact Plymouth Highways for the necessary permit. Precise details of all works that impact upon the public highway must be agreed with Plymouth Highways.


Gary Lester
Transport Planning Officer
Officer authorised to sign on behalf of the Service
Director for Strategic Planning & Infrastructure

Comment Date: Fri 03 Mar 2023

LLFA consultation response 23.00122.FUL.pdf