Combs Flat Road Extension – Segment 1A & Ochoco Irrigation District Ironhorse Piping
This landmark infrastructure project is the largest single transportation project in Prineville’s history, jointly delivered by the City of Prineville and the Ochoco Irrigation District. The effort co-located a new arterial roadway with a 78-inch HDPE irrigation pipeline within a shared corridor, addressing long-standing transportation, safety, water delivery, and land development needs in a unified solution. Roadway improvements included the extension of NE Combs Flat Road approximately 5,900 linear feet, construction of a new roundabout at NE Hudspeth Road, and installation of new water, sewer, and stormwater infrastructure. Irrigation piping work included installation of approximately 7,200 linear feet of 78-inch HDPE pipeline along the corridor, supporting critical regional water delivery improvements while enabling future growth and connectivity.
Location:
Prineville, Oregon
Owner:
City of Prineville
YEAR COMPLETED:
2025
AWARDS:
- ACEC Oregon Engineering Excellence Award
- DJC Top Project Award