Nampa, ID

Deep Sewer Trunk Line Extension

Partnership to support long-term growth and development through vital infrastructure upgrades

Construction crew installing large steel trench shoring panels with an excavator at a roadside excavation site under a clear blue sky. Workers in high-visibility safety gear stand around the trench while heavy equipment operates nearby.

Deep construction trench reinforced with yellow steel shoring panels and cross braces, with an orange ladder leaning down into the excavation and a green pipe segment at the bottom.

IMCO Construction is leading a joint venture with Knife River Corporation to tackle challenging construction conditions in Nampa, Idaho. The IMCO/Knife River team is under a CMGC collaborative delivery contract to deliver 2.3 miles of deep sewer trunk line, ranging from 15 to 35 feet deep, and new water and irrigation utilities. Work is located within the Ustick Road corridor and also includes significant shoring and dewatering, excavation, roadway replacement, and traffic control.

The Purdam Trunk Sewer Extension team is supporting the City of Nampa’s long-term growth and development through installation of vital infrastructure to enable economic growth, improve service reliability, and increase capacity in northern Nampa.

Owner

City of Nampa

Duration

2025 - present

Anticipated Completion

2027

Construction Services

GCCM & CMGCPreconstruction Services

Deep Sewer Trunk Line Extension

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