Gitwinksihlkw Raw Water Intake and Water Treatment Plant
Location: Gitwinksihlkw, BC
Owner: Nisga’a Village of Gitwinksihlkw
Project: Drinking Water Supply & Treatment Improvements
Project Cost: $5,500,000
Scope: This project necessitated the construction of a new water treatment facility with state-of-the-art equipment including an Actiflow clarifier and Dusenflo filters supplied by John Meunier. Work also included installation of a new raw water intake system withdrawing directly from the Nass River, as well as installation of 600 lm 150-diameter new raw water supply piping and 250-diameter new treated water distribution piping to existing reservoir. Water Treatment Plant facility consisted of a 2600-square-foot building containing 400 m3 of reinforced concrete foundations, masonry blocks and heavy timber wood framing, complete with cedar siding. Intake structure consisted of two 24-inch diabeter steel pipes installed in a trench down the rock banks of the river. Intake pipes were secured to the bedrock with four 20 m3 each concrete anchor blocks containing rock dowels socketed into bedrock. This site required mass rock removal, trench rock removal and earth works. The access road consists of concrete curb and gutter, asphalt paving, roadside barriers and sidewalks.