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South Yamhill River Bridge Replacement, Final Environmental Assessment & FONSI

Notice of Availability of Environmental Assessment and Finding of No Significant Impact

Publish Date: December 20, 2019

South Yamhill River Bridge Replacement, Oregon Highway 18 Spur, Yamhill County, Oregon

South Yamhill River Bridge, Yamhill County


The Oregon Department of Transportation (ODOT) and the USDA Natural Resources Conservation Service (USDA-NRCS) announce the availability of two planning documents for public review and comment that recommend replacing a bridge over the South Yamhill River on Oregon Highway 18 Spur in Yamhill County, Oregon.

The planning documents are an Environmental Assessment (EA) and a Finding of No Significant Impact (FONSI). The documents are available for public view on the USDA-NRCS Oregon website at Printed copies of the documents may also be viewed at the USDA McMinnville Service Center, located at 2200 SW 2nd Street in McMinnville, Oregon.

The current bridge needs costly repairs to replace rotting wood piles. Replacing the bridge with a new structure will meet current safety and environmental standards and reduce ongoing maintenance expenses.

The bridge is a critical link between the City of McMinnville and the Willamette Valley Medical Center, requiring an open flow of traffic during construction. The proposed project would construct a new bridge on temporary bents west of the existing bridge, which would serve as a detour for traffic flow while the old bridge is safely demolished. After demolition, the detour structure will be relocated permanently to the same site alignment of the old bridge. The new bridge would be 18.75 feet wider than the existing bridge. Construction is anticipated to last three years.

The proposed bridge replacement would cause minimal temporary environmental impacts to wetlands on both sides of the highway that are permanently protected through the NRCS Wetland Reserve Easement program. These wetlands provide multiple ecological benefits such as habitat for migratory birds, fish and wildlife; improved flood water storage; and enhanced water quality.

Impacts to the adjacent wetlands will be temporary and minimal, and those impacts will be restored following construction using techniques such as replanting disturbed areas with native species. No permanent transportation features will be left within the easement area following construction.

The public review period of the EA and FONSI begins December 20, 2019 and ends on Jan. 20, 2020.

Questions concerning the project may be emailed to or mailed directly to:

Attn: Bari Williams, USDA-NRCS
1201 NE Lloyd Blvd, Ste 900
Portland, OR 97232

Planning Documents