The London Borough of Barking and Dagenham has gone out to tender with a contract for culvert repair works worth an estimated £750,000 (inc VAT).
The Choats Road culvert structure consists of a twin bore corrugated steel Armco type culvert located on Choats Road in Barking, London which has structurally failed at sections along its length. In 2024 an inspection by the borough’s consulting civil engineers (Arcadis identified that voids are forming under the concrete culvert slab which supports the road in both its east and west spans.
The road (and the culvert that supports it) provides a crucial gateway into the Barking Riverside Developments 25,000 new homes, 5,000 new business opportunities and new transport hub.
Each of the culverts is 36.6m long, with a width of approximately 2.8m and height of 1.5m - due to the nature of the failure a road load restriction (7.5tonnes) has been put in place to minimise the risk to the public. The Council is looking to appoint a contractor to design and install a GRP culvert lining solution that will restore capacity to the culvert. A comprehensive solution that meets all requirements is being sought.
The works involves:
Pre-design Phase
The contractor is required to undertake a survey of the culvert to confirm its dimensions and the nature of the construction of the river bed. A Flood Risk Activity Permit for this work has already been granted by the Environment Agency Permit applications.
Design Phase
During the Design Phase, the contractor must provide design and construction information for the Council's Phase 2 Flood Risk Activity Permit application which would enable procurement of necessary permissions from the Environment Agency, and prepare an approved Approval In Principle (AIP) document for the Choats Road Culvert strengthening per DMRB CG300. They must also deliver detailed designs, specifications, certificates, and temporary works design based on the AIP once approved.
Construction Phase.
During the Construction Phase, the contractor is required to clean the culvert, install a GRP lining, manage site preliminaries, provide temporary works, and conducting pre- and post-installation surveys.
The contractor will be required to provide reasonable access to the client and appointed agents to undertake environmental surveys in support of Environment Agency.
The tenderers will complete the Pre-design Phase and Design Phase of the works before commencing the Construction Phase of the works.
Current estimated start and end contract dates are 4 August 2025 to 19 December 2025
Deadline to submit enquiries about the tender 1:00pm on and 11 July 2025 and tender submission deadline
1:00pm on 21 July 2025.
Click here to access the London Borough of Barking & Dagenham eTendering portal for more information
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