Engineering services for new pump station and flood box

This new facility will enable substantial energy cost savings by operating the pump at a lower discharge level during normal conditions.

Hammersley Pump Station is located approximately 6km west of Agassiz in the District of Kent. It conveys run-off from Mountain Slough watershed - draining a catchment area of 32.3 square kilometres – when the flood box sluice gates are closed during the annual Fraser River freshet.

The new pump station will increase the pumping capacity from 2.2 to 7.2m3/s. The new flood box will be constructed with a flat grade and will incorporate baffles and ponds to facilitate safe passage for spawning fish heading upstream.

The new pump station incorporates two 300 HP fish friendly Archimedean screw pumps, each capable of pumping 2.5m3/s. The pump station is designed to pump the full flow at the highest freshet water level, but also incorporates a gate controlled pump discharge outlet at 1.5 meters below the top crest level. This will enable the District to realize substantial energy cost savings by operating the pump at the lower discharge level during normal freshet conditions.