Bridge conditions in Benton County, Oregon
190 inventoried bridges · 20 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 10 bridges in Benton County is rated in poor condition: 20 of 190 on the federal inventory, one of the higher shares in Oregon.
- 20 of the 190 bridges in Benton County, Oregon, are rated in poor condition (10.5%) in the 2025 National Bridge Inventory, as of .
- 50 bridges (26.3%) are rated good and 120 (63.2%) fair.
- The median Benton County bridge was built in 1967.
- The busiest poor-rated bridge is Hwy 210 EB over Willamette River (built 1913), carrying about 12,687 vehicles a day.
Good 26.3% · Fair 63.2% · Poor 10.5% of 190 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Hwy 210 EB over Willamette River | 1913 | 12,687 | Poor |
| OR 34 (Hwy 210) WB over Willamette River | 1964 | 12,687 | Poor |
| NW Grant St over Dixon CR | 1967 | 4,100 | Poor |
| NW Garfield Ave over Dixon CR | 1958 | 3,374 | Poor |
| E Ingram Island Rd over Ingram Slough | 1963 | 469 | Poor |
| Llewellyn Rd over Muddy Creek Overflow | 1959 | 437 | Poor |
| Beaver Creek Rd over Beaver Creek | 1962 | 269 | Poor |
| Mc Farland Rd over Muddy Creek | 1963 | 182 | Poor |
| Smith Loop over Slough | 1956 | 182 | Poor |
| Dodge Island Rd over Dodge Island Slough | 1963 | 177 | Poor |
| Robison Rd over Soap Creek | 1977 | 140 | Poor |
| Foster Rd over Oliver Creek | 1959 | 125 | Poor |
| Bruce Rd over Muddy Creek | 1972 | 112 | Poor |
| Mc Farland Rd over Muddy Creek | 1963 | 107 | Poor |
| Wiles Road over Soap Creek | 1960 | 102 | Poor |
| Hayden Road over Alsea River | 1945 | 102 | Poor |
| Ltl Lobster CR Rd over Little Lobster Creek | 1963 | 101 | Poor |
| Alexander Road over Burgett Creek | 2003 | 97 | Poor |
| Williams Rd over Hammer Creek | 1964 | 75 | Poor |
| Haines Road over Bummer Creek | 1961 | 63 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| OR 99W (Hwy 91) SB over Marys River | 1949 | 23,359 | Fair |
| US 20 (Hwy 33) over Wprr | 1960 | 22,606 | Fair |
| OR 34 (Hwy 33) over Willamette River | 1991 | 22,606 | Good |
| Or 34 (hwy 33) over 3rd & 4th Streets | 1992 | 22,606 | Good |
| US 20 (Hwy 33) over Oak Creek | 1960 | 22,169 | Fair |
| NW 9TH St over Dixon CR | 1985 | 20,182 | Fair |
| NW 9TH Street over Sequoia Creek | 1940 | 19,662 | Fair |
| Or 99W (hwy 91) over Creek | 1992 | 19,591 | Good |
| US 20 (hwy 31) EB over Willamette River | 1925 | 16,759 | Fair |
| Or 99W (hwy 91) over Jackson Creek | 1919 | 15,894 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Oregon: Oregon bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.