Project Description

Overview

An existing 8m long invert on a tributary stream – leading to a brick built culvert on the River Otter in Newton Poppleford – had deteriorated over the years and perished. With the uneven surface, silt sediment had built up and restricted the flow, possibly contributing to the recent flooding in the area.

 

Challenge

To begin the work, we had to build a dam and over pump the water through the culvert.

We excavated and removed the silt sediment by hand to a depth suitable for the concrete – while still maintaining the original invert level. Due to the length of the culvert and the limited 6m3 space available, we had to pour the concrete using a pump.

To reduce the potential for pollution and impact of contamination, we added special additives to the concrete. We also monitored the weather conditions, to keep track of river levels and flood risks.

 

Results

Despite working in limited space, we completed the work on time and on budget, and significantly reduced the flood risk to the local area.

 

Quick facts:

Client: Devon County Council

Value: £7,500

Project type: Bridges & Structures

Duration: 2 weeks