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Planning application

Usk Bridge Merthyr Road Llanfoist Monmouthshire

Awaiting decision Monmouthshire DM/2026/00292 Certificate of Prop Lawful Use or Dev

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

The proposal is for the construction of a new fish pass at Abergavenny bridge, Llanfoist. Abergavenny Bridge is orientated perpendicular to flow across the River Usk, with a total length of 62m . The bridge apron, which terminates in a vertical drop which is exposed in low flows, presents a barrier to fish migration . The apron is considered a significant barrier to shad, although they are occasionally observed upstream, as well as other fish species such as lamprey. The shallow apron also delays salmonid passage during low flows, particularly the sloping glacis towards the disused railway bridge abutments. A fish pass has been determined as the best solution to this barrier. The pass will comprise a notch in the concrete apron below Arch 2 (second arch from the true right bank), in which perturbation boulders will be evenly spaced. This will provide an area of deeper, slower flowing water for fish to move through. This is hoped to be particularly beneficial to shad populations, which migrate upstream to spawn during summer (primarily June/July) when river flows are often at their lowest. The bridge, which is owned by Monmouthshire County Council, is a Scheduled Monument and Grade II* listed structure. The proposed works are therefore to be carried out under Scheduled Monument Consent with appropriate archaeological supervision. The proposed design of the new fish pass comprises a ?notch? within the concrete apron. This notch will require the cutting of a channel into the concrete, approximately 3.6m wide and 700-800mm below the existing level. These dimensions have been chosen to ensure that the final level is effective as a fish pass. It was decided that the most appropriate arch to locate the fish pass was Arch 2, so as to optimise hydraulics of the fish-pass and the lower depth of the apron as compared to the other arches, which minimises the depth of excavation. To provide a 5% gradient (and therefore appropriate velocities), the channel will need to

As published by the council, reference DM/2026/00292

Application record

Reference
DM/2026/00292
Type
Certificate of Prop Lawful Use or Dev
Status
Pending Consideration
Received
9 Mar 2026
Validated
9 Mar 2026
Ward
Grofield
Parish
Abergavenny Town Council

Timeline

Dates from the published record

  1. 9 Mar 2026

    Received by Monmouthshire

  2. 28 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 4 May 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Monmouthshire took a median of 49 days over the applications it decided in the last year.

Documents

Plans, drawings, consultee responses and the officer's report

6 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

This application is with Monmouthshire for determination, against a statutory target of eight weeks. Over the last year Monmouthshire decided lawful development applications in a median of 31 days. More in our guide to how long planning decisions take.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

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