Salmonberry Rd over Alsea River

Benton County, Oregon · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

• Salmonberry Rd over Alsea River in Benton County, Oregon, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
• Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
• It was built in 1959, making it 66 years old at the 2025 inventory.
• It carries about 75 vehicles a day (traffic count year 2020).
• Its listed owner is the county highway agency.
• It is one of 120 of the 190 inventoried bridges in Benton County rated fair (63.2%); 20 (10.5%) are rated poor.
• Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
• Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 7, superstructure 6 to 7, substructure 5 to 6.
• Its most recent inspection on record is dated July 2024, on a 24-month routine inspection cycle.
• It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
• A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

View this bridge on a map → (44.34293, -123.68676)

Component ratings

Bridge details

Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.

Busiest bridges in Benton County

All bridges nearby: Benton County, OR bridge conditions · every bridge in Benton County · Oregon bridges.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.