Plans for the drainage system serving the first 109 homes at Oakmere Rise, north of Yeovil’s A359 Mudford Road, have been approved despite continued concerns about flood protection downstream.
Somerset Council’s planning committee voted seven to three in favour of the amended plans, with one councillor abstaining, after approximately two hours of debate. The decision allows the first phase of the development to proceed with a drainage design different from the one included in the original outline permission.
How the Oakmere Rise drainage scheme will change
The constructed wetlands originally proposed for the development will be removed. They will instead be replaced by attenuation ponds and reed-beds, which will form part of a sustainable urban drainage system, known as SUDS.
Land originally intended for the wetlands is due to become public open space. The treatment wetland had been planned for the northern edge of the site, where it would have provided a substantial green buffer and helped manage phosphate levels affecting the Somerset Levels and Moors.
Oakmere Rise is being developed on the Mudford Sock site. Yeovil LVA LLP secured outline planning permission on appeal in March 2024 for 252 homes. The land was later sold to Bloor Homes South West, which submitted the detailed plans for the first phase.
Why Mudford and other communities remain concerned
Groups representing Ashington, Chilton Cantelo and Mudford have questioned whether the replacement drainage system will provide the same flood storage and protection as the cascading wetlands set out in the original plans.
The 3 Villages Flood Group said the planning inspector had viewed the wetlands as having a broader flood-mitigation role, rather than serving only to control phosphate. The group also raised concerns about the resilience of downstream communities while construction continues and additional water enters the shared drainage network.
Monitoring by the Yeovil Community Rivers Trust found that rainfall near the site was approximately 37% higher than the developer’s models had accounted for. This led to calls for the combined effect of other developments sending water into the same drainage system to be considered.
During the committee discussion, Councillor Stephen Page, the Liberal Democrat representative for Somerton, asked whether the revised arrangements could create health or safety risks, particularly for children living on the estate. Planning officer Dawn de Vries told the committee that an unsafe scheme would not be approved.
More Oakmere Rise decisions expected
Councillors Mike Stanton and Oliver Patrick supported the amended plans. Stanton said the replacement system was likely to be more environmentally friendly and visually appealing. Patrick pointed to a projected 20% biodiversity net gain, described as twice the minimum requirement, and said mechanical pumps for an artificial wetland would have a greater carbon footprint than passive SUDS.
Further decisions are expected before Christmas on the detailed first phase and on a separate application intended to speed up construction of a new crossroads for the estate’s main access.
Nearby communities are continuing to scrutinise how the revised drainage system performs as Oakmere Rise is built.