Otaki Street Stormwater
Pump Station
Client:
Waimakariri District Council
Consultant:
Beca
Contract:
$2,200,000
Duration:
December 2021 – September 2022
Services:
Civil Engineering
Mechanical
Precast and Insitu Concrete
Project Management
Brief:
Construction of a stormwater pump station in Otaki St, Kaiapoi, as part of the Kaiapoi Stormwater & Flooding Improvements Programme to mitigate the flood risk in the area. The station is designed to drain the catchment into the Kaiapoi River.
Scope:
- Temporary works consisting of a cofferdam 9m x 12m with 9m deep FSPIII sheet piles.
- Various driven dewatering wells to enable excavation to 5m below ground level.
- Earthworks involving bulk excavation of 540m3 and subsequent filling of 350m3.
- Concrete works for insitu wet well and valve chamber.
- DN500 DI mechanical piping.
- DN900 & DN1200 concrete interceptor gravity pipework.
- DN900 PE Pressure main
- DN250 PE Pressure sewer main diversion.
- Steelworks involving HDG grating, aluminium covers and handrails.
- Construction of electrical control room; consisting of insitu-concrete floor, precast walls and roof, installation of electrical switchboards and all associated wiring and commissioning electrical works.
- Reinstatement works
- Pavement reconstruction and reseal
- Watermain renewal and RPZ install
- Driveway reconstruction
- Landscaping