Elan Valley Aqueduct

Constructed between 1896 and 1906 the Elan Valley Aqueduct carried water from reservoirs in mid Wales to Frankley water storage works to the west of Birmingham. Leakage and a requirement for additional capacity requires the route to be updated with a series of by-passes.

Geotechnical Observations is monitoring the existing structure whilst cofferdams are installed to enable tunnelling to be undertaken. We are doing this using horizontal and circular SAAs to measure displacements, triaxial geophones to measure vibration and crack gauges.