Avon Dam Submerged Pipeline
Client: Concrete Constructions/Kinhill/Waterway Constructions
Date: 1995 to present
The company provided 3 diving teams to install the 1.8km submerged pipeline at Avon Dam. The 1.75m diameter pipe with each pipe section weighing 40 tonnes was installed on over 200 driven steel piles on diver installed steel headstocks and saddles. Additionally , one crew installed over 100 tonnes of pipework on the existing intake tower including the ring main, risers and 4 off 5 tonne stainless steel strainers as well as all valves. Works included ultrathermic cutting of over 200 piles to an RL, laying and coupling each 40 tonne pipe string with a specially built pipe lay barge as well as additional diving works including the removal of numerous trees still in the route of the pipeline. The companies input and expertise in the pipelay methodology allowed the pipelaying operations to triple productivity and complete the project on time.
Since 1995 the company has provided ongoing maintenance to the Avon dam pipeline system for Veolia Water. This includes annual inspections, cathodic protection, valve replacement and maintenance enabling this vital part of the water supply infrastructure to operate efficiently.