Bridge conditions in Walla Walla County, Washington
195 inventoried bridges · 18 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Walla Walla County tracks close to typical: 18 of its 195 inventoried bridges (9.2%) are rated poor, against a national rate of about 7%.
- 18 of the 195 bridges in Walla Walla County, Washington, are rated in poor condition (9.2%) in the 2025 National Bridge Inventory, as of .
- 121 bridges (62.1%) are rated good and 56 (28.7%) fair.
- The median Walla Walla County bridge was built in 1989.
- The busiest poor-rated bridge is US 12 over Nine Mile CR & RR (built 1933), carrying about 8,140 vehicles a day.
Good 62.1% · Fair 28.7% · Poor 9.2% of 195 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 |
|---|---|---|---|
| US 12 over Nine Mile CR & RR | 1933 | 8,140 | Poor |
| US 12 over WB Off Ramp | 1971 | 4,350 | Poor |
| 4TH St over Mill Creek | 1908 | 2,624 | Poor |
| 6TH St over Mill Creek | 1920 | 1,970 | Poor |
| 5TH St over Mill Creek | 1916 | 1,970 | Poor |
| Wallula Ave over Mill Creek | 1947 | 948 | Poor |
| Stateline Rd (2) over Pine Creek | 1964 | 545 | Poor |
| SR 125 over Touchet River | 1916 | 416 | Poor |
| Mill Creek Rd over Mill Creek | 1981 | 380 | Poor |
| Five Mile Rd over Mill Creek | 1953 | 340 | Poor |
| Lyons Ferry Rd over Fields Gulch | 1973 | 160 | Poor |
| Pettyjohn Rd over Touchet River | 1914 | 100 | Poor |
| Meinburg Rd over Coppei Creek | 1971 | 80 | Poor |
| South Fork Coppei over South Fork Coppei CR | 1920 | 60 | Poor |
| Seven Mile RD over Mill Creek | 2020 | 50 | Poor |
| Smith Springs Rd over Dry Hollow | 1926 | 36 | Poor |
| Smith Springs Rd over Dry Hollow | 1926 | 24 | Poor |
| Thiel Rd over Woodward Canyon | 1953 | 9 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 125 over Walla Walla River | 1988 | 17,209 | Good |
| SR 125 over Yellowhawk Creek | 1988 | 17,209 | Fair |
| Myra Rd over Mill Creek | 2008 | 13,345 | Fair |
| 2ND Ave over Mill Creek | 1915 | 10,563 | Fair |
| Rose Street over Mill Creek | 2021 | 10,500 | Good |
| Wilbur Ave over Mill Creek | 1955 | 10,053 | Fair |
| US 12 over Abandoned RR Grade | 1953 | 8,735 | Fair |
| US 12 over Walla Walla River | 1953 | 8,735 | Fair |
| US 12 over Railroad | 1981 | 8,735 | Fair |
| US 12 over Walla Walla R | 1917 | 8,169 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Washington: Washington 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.