Lewiston, ID

Clearwater River Irrigation Pump Station

Collaborative design alternative analysis process to mitigate significant risks

This project will build a river pump station to pump 8,500 acre-feet of water annually from the Clearwater River to Mann Lake, transporting irrigation water to a reservoir seven miles away. The river intake work consists of a concrete river inlet with fixed wedge wire screens that conform to National Oceanic and Atmospheric Administration anadromous fish requirements. The pump station and wet well work consists of a 60-foot-deep concrete trench-style wet well fed by a gravity pipe from the river intake with four vertical turbine pumps, each pumping 2,000 GPM. Pipeline work includes 7 miles of buried 24-inch transmission main. On the hill above Mann Lake, there will be a discharge structure where the pressurized pipe flow will be converted to open channel flow before being discharge into the lake.

JUB and IMCO Construction are bringing value to the client through the CMGC process. The construction and design team is working through an extensive alternatives analysis process. Alternatives are being explored for the general concept and layout, and complex access. IMCO Construction is providing cost estimates for the schedule and the risk profile. The 60% design will capture final design for location and access to mitigate the most significant project risks.

 

Owner

Lewiston Orchards Irrigation District

Contract Amount

$60 million

Duration

2026-2028

Construction Services

GCCM & CMGCPreconstruction ServicesVirtual Design Construction