PROJECT INFO
Client: Western Water
Project Design: CMP Consulting Group
Contract Sum: $1.1M
ABOUT THE PROJECT
Gisborne Recycled Water Plant Lagoon 1
Insufficient capacity is available at the Gisborne RWP to store high flows to the RWP that occur after high-rainfall events. The project works include for design and construction works to convert Maturation Lagoon 1 (MAT1) into a wet-weather retention basin, including installation of an impermeable liner and associated works. The project’s intention is to convert Lagoon 1 into an EPA compliant wet-weather retention basin, which would temporarily hold screened or unscreened raw sewage wet-weather sewage inflows, before returning the stored flows to the head of the plant for treatment.
WORKS
- Earthworks to modify existing lagoon
- Pipeworks and associated connections
- Installation of underground pump station
- Installation of above ground pump station
- HDPE liner installation for the lagoon
- Electrical and SCADA upgrades to existing infrastructure
- Modifications to the existing outlet structure
KEY ASPECTS
- Working in an operating treatment plant
- Maintaining existing plant operability
- Managing high rain fall events throughout the works