Bridge conditions in Clark County, Washington
219 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 219 bridges in Clark County: 118 rated good, 91 fair, and 10 poor.
- 10 of the 219 bridges in Clark County, Washington, are rated in poor condition (4.6%) in the 2025 National Bridge Inventory, as of .
- 118 bridges (53.9%) are rated good and 91 (41.6%) fair.
- The median Clark County bridge was built in 1975.
- The busiest poor-rated bridge is I-5 over E Fork Lewis River (built 1939), carrying about 41,939 vehicles a day.
Good 53.9% · Fair 41.6% · Poor 4.6% of 219 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 |
|---|---|---|---|
| I-5 over E Fork Lewis River | 1939 | 41,939 | Poor |
| I-5 over Lewis River | 1940 | 41,939 | Poor |
| SR 500 over Lacamas Lake | 1930 | 11,155 | Poor |
| SR 500 over Hjf Canal | 1915 | 7,516 | Poor |
| SR 14 over Bn RR | 1972 | 6,000 | Poor |
| 172nd Ave over China Ditch | 2009 | 1,790 | Poor |
| SR 503 over Lewis River | 1932 | 1,239 | Poor |
| SR 503 over N Branch Chelatchie CR | 1953 | 838 | Poor |
| Cc Landon Road over Yacolt Creek | 1955 | 312 | Poor |
| No Data Entered over Canyon Creek | 1948 | 207 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-205 over SR 14 Bnrr | 1982 | 160,000 | Fair |
| SR 500 over NE Gher Rd & NE 112 Ave | 2004 | 65,414 | Fair |
| I-5 over Columbia River | 1916 | 65,013 | Fair |
| I-5 over Columbia River | 1958 | 65,013 | Fair |
| I-205 over Burton Rd | 1974 | 59,900 | Fair |
| I-205 over Burton Rd | 1974 | 59,900 | Fair |
| I-5 over NE 179TH St | 1961 | 56,125 | Fair |
| I-5 over NE 179TH St | 1966 | 56,125 | Fair |
| I-5 over SR 501/MILL Plain Blvd | 1979 | 52,908 | Good |
| I-5 over SR 501/MILL Plain Blvd | 1981 | 52,908 | Good |
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.