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Farmington Road and River Road Intersection

The intersection of Farmington and River roads will be improved with a roundabout.

The Farmington and River roads intersection sees a lot of traffic. During commute times, travelers have long wait times to get through the intersection. The all-way stop is limiting traffic in all directions.

We plan to build a roundabout that will limit impacts to property owners, the floodplain and the environment.

Construction start (expected): June 2024
Construction finish (expected): April 2025

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7/17/2024: River Road will be closed from Farmington Road for about 300 feet south from July 31 and ending on our about Nov. 18. See Closure 1, below, for more information.

Final utility relocation continues with flaggers controlling traffic. The contractor has begun construction. Expect intermittent lane closures between 9 a.m.-3:30 p.m. throughout construction.

We are planning two closures of River Road during construction:

Closure 1:

River Road, south of Farmington Road, will be closed for about 110 days, tentatively starting July 31. Dates are subject to change.

Traffic will detour to Scholls Ferry Road (OR 210) and Hillsboro Highway (OR 219).

See detour map

Closure 2:

River Road, north of Farmington Road, will be closed for about 70 days this winter/spring.

Traffic will detour to Hillsboro Highway (OR 210) and Minter Bridge Road.

See detour map

See construction staging


Cost Estimate: $11.3 million

Funding sources:

Farmington Road and River Road location map

Detour map for River Road closure south of Farmington Road:

Detour for River Road closure south of Farmington Road

Detour map for River Road closure north of Farmington Road:

Detour for River Road closure north of Farmington Road


Prior events and comment opportunities

Open house: May 31-June 23, 2024

Open house: Aug. 13-29, 2021

Open house: April 17-May 3, 2021

Discovery planning

Throughout the development and design of this project, we have received concerns about possible graves in the project area. The project team conducted a detailed survey and used Ground Penetrating Radar to locate possible historic graves, which were found on private property outside the project area. The project design and utility relocation work avoids impacts to the location.

We have coordinated with the State Historic Preservation Office (SHPO) as well as the Oregon Historic Cemeteries Program to develop a plan in the event any remains are discovered during construction. The plan includes immediately stopping work in the vicinity and creating a 100-foot buffer around the discovery. The area will be protected and secured. Notifications will be made to appropriate organizations including the SHPO, Oregon State Police, Commission on Indian Services, and the appropriate Tribes.

Appropriate survey reduces the possibility that any historic artifacts will be discovered. The plan is in place in the unlikely event that something is discovered.