Hanmer Springs WWTP Upgrade
Hurunui District Council operates the pond-based wastewater treatment plant of Hanmer Springs. Civil Construction's services were required for the upgrade for the increase of the plant's hydraulic & processing capacity.
The works were for the installation of new outlet structures and pipework in Ponds 3, 4 and 5 and the modification of outlets and pipework in Ponds 1 and 2. It also included the installation of flow directing floating curtains into Ponds 3 and 4.
Challenges included working in a live wastewaste treatment plant while carrying out the upgrades, lack of previous asbuilt information which involved CCL putting forward ideas for de-design that met specifications & cost constraints. Stormwater infiltration to the foul sewer network after the Kaikoura earthquake.
Location: Hanmer Springs, Canterbury
Client: Hurunui District Council
Contract Values: $0.42M including 11 variations to the contract as per clients request.
Timeframe: July to Mid-September 2019