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Braid Burn Flood Prevention Scheme

Edinburgh, UK

Project outline

The City of Edinburgh has experienced flooding from the Braid Burn on several occasions. The most recent events occurred in April 2000 and October 2002 which resulted in flooding to a number of properties adjacent to the watercourse and substantial damages. Following the flood event of April 2000, the City of Edinburgh Council initiated a Flood Study to assess the risk of flooding to areas and develop flood alleviation options leading to a preferred solution.

Faber Maunsell was commissioned to refine the proposals and design a flood prevention scheme to achieve a 1 in 200 year standard of defence with an allowance for climate change. The proposed works include improvement or replacement of several culverts and bridges, new flood embankments, floodwalls, strengthening of existing defences and the creation of two flood storage reservoirs under the Reservoirs Act. Maximum use is made of the natural flood plain where this is practical.

In parallel with the flood alleviation objectives, this project will enable the Council to improve the visual, amenity and environmental quality of the river corridor. An Environmental Statement (ES) and Environmental Action Plan (EAP) have been prepared in order to identify and assess the impacts of the scheme, achieve appropriate mitigation measures and seek maximum enhancement potential.

A cost-benefit analysis was carried out in order to gain grant aid from the Scottish Executive and a Flood Prevention Order was submitted for approval.

Faber Maunsell developed outline designs taking into account the feedback from the public consultation phase and submitted these for planning consent. Planning Approval was granted in April 2004 and full detailed designs have been developed in order to enable the appointment of a Contractor to construct the works. Faber Maunsell advised the client on the contract strategy and the contract documents have been prepared using the Engineering and Construction Contract, Option C. Some elements of the scheme have already been constructed on site in advance of the main works.

Contract value

£18m

Key features

Complex urban flood alleviation scheme
Flood storage reservoirs in accordance with the Reservoirs Act
Flood walls and embankments
New culverts and bridges
River restoration
Large scale consultation
Use of ECC, Option C

Appointment

Hydrological and hydraulic analysis
Economic assessment for grant funding
Environmental assessment
Public consultation
Planning submission
Structural Assessments
Geotechnical Design
Reservoir Engineer Services
Preliminary and detailed design
Contract documents
Planning supervisor role
Site Supervision