Whitman County Bridge Report Card
Whitman County scores 65 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Whitman County, Washington
Whitman County has 349 bridges in the National Bridge Inventory, with 13 rated poor and 32 rated scour-critical. Its poor-condition share of 3.7% is at or below the 5.6% statewide average. Poor-condition bridges carry about 34,574 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Whitman County a Bridge Condition Exposure Score of 65/100 (D). The county has 349 bridges in the National Bridge Inventory, including 13 in poor condition and 32 rated scour-critical. Poor-condition bridges carry about 34,574 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 3.7% | 7.4 |
| Poor-condition traffic exposure | 25 | 10.5% of measured traffic | 7.9 |
| Scour-critical bridge share | 20 | 9.2% | 18.3 |
| Average age vs national baseline | 10 | 52 years vs 48 nationally | 1.5 |
| Traffic-data completeness | 5 | 329,300 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 3.7% |
| State Poor-Condition Share | 5.6% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 9.2% |
| Average Bridge Age | 52 years |
| Poor-Condition Traffic Exposure | 34,574 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Whitman County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| US 195 over S Fk Palouse River | Poor condition + traffic exposure | Poor | 9,381 | 1923 |
| US 195 over Spring Flat Creek | Poor condition + traffic exposure | Poor | 9,093 | 1920 |
| US 195 over Bn Ry & Old SR 195 | Poor condition + traffic exposure | Poor | 4,838 | 1975 |
| SR 26 Spur over Palouse River | Poor condition + traffic exposure | Poor | 3,246 | 1938 |
| SR 26 over Palouse River | Poor condition + traffic exposure | Poor | 3,094 | 1937 |
| SR 26 over Willow Creek | Poor condition + traffic exposure | Poor | 1,655 | 1967 |
| SR 26 over Pcc Rr | Poor condition + traffic exposure | Poor | 1,555 | 1967 |
| SR 23 over Pleasant Valley CR | Poor condition + traffic exposure | Poor | 778 | 1958 |
| SR 23 over Rock Creek | Poor condition + traffic exposure | Poor | 269 | 1946 |
| SR 23 over Imbler Creek | Poor condition + traffic exposure | Poor | 269 | 1946 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.