Washington bridges
Washington reports 8,520 bridges and culverts across 40 counties. 473 (5.6%) are rated in poor condition, and 837 are posted with load limits or closed. The oldest structure still in the inventory dates from 1900.
Find a bridge in Washington
Type at least two characters, or pick a condition or type, to search every bridge in the state.
Counties
Circle size reflects the number of bridges- Adams County 187
- Asotin County 28
- Benton County 167
- Chelan County 148
- Clallam County 153
- Clark County 219
- Columbia County 86
- County 000 1
- Cowlitz County 161
- Douglas County 40
- Ferry County 55
- Franklin County 133
- Garfield County 54
- Grant County 304
- Grays Harbor County 371
- Island County 7
- Jefferson County 97
- King County 1,252
- Kitsap County 120
- Kittitas County 313
- Klickitat County 91
- Lewis County 420
- Lincoln County 180
- Mason County 136
- Okanogan County 161
- Pacific County 120
- Pend Oreille County 71
- Pierce County 480
- San Juan County 13
- Skagit County 256
- Skamania County 120
- Snohomish County 500
- Spokane County 309
- Stevens County 75
- Thurston County 199
- Wahkiakum County 37
- Walla Walla County 195
- Whatcom County 355
- Whitman County 349
- Yakima County 557
Condition
Good51%(4,343)
Fair43%(3,704)
Poor6%(473)
Counties with the highest share of poor bridges
- Pend Oreille County15.5% of 71
- Douglas County12.5% of 40
- Adams County12.3% of 187
- Stevens County12.0% of 75
- Kittitas County11.2% of 313
Structure types
| Structure type | Bridges | Share |
|---|---|---|
| Stringer/Multi-beam or Girder | 3,534 | 41.5% |
| Slab | 1,500 | 17.6% |
| Tee Beam | 1,065 | 12.5% |
| Culvert | 617 | 7.2% |
| Box Beam or Girders - Multiple | 616 | 7.2% |
| Channel Beam | 327 | 3.8% |
| Frame | 206 | 2.4% |
| Truss - Thru | 158 | 1.9% |
| Girder and Floorbeam System | 122 | 1.4% |
| Arch - Deck | 107 | 1.3% |
| Box Beam or Girders - Single or Spread | 106 | 1.2% |
| Other | 43 | 0.5% |
| Movable - Lift | 37 | 0.4% |
| Truss - Deck | 26 | 0.3% |
| Arch - Thru | 23 | 0.3% |
| Movable - Bascule | 11 | 0.1% |
| Segmental Box Girder | 9 | 0.1% |
| Suspension | 5 | 0.1% |
| Movable - Swing | 5 | 0.1% |
| Stayed Girder | 3 | 0.0% |
When Washington's bridges were built
Busiest
- I-205 over SR 14 BnrrFairClark County · 160,000 vehicles/day
- I-90 EB over Sunset CreekGoodKing County · 139,482 vehicles/day
- I-90 WB over Sunset CreekGoodKing County · 139,482 vehicles/day
- N Queen Anne DR over RavineFairKing County · 125,000 vehicles/day
- I-5 over TerrainFairKing County · 122,487 vehicles/day
Longest
- US 101 over Columbia RPoorPacific County · 11,200 ft
- SR 520 over Lake WashingtonFairKing County · 7,635 ft
- I-205 over SR 14 BnrrFairClark County · 7,434 ft
- I-5 over Denny Way-Lakeview VFairKing County · 7,077 ft
- US 2 over Ebey IslandFairSnohomish County · 6,923 ft
Oldest
- Bauman Rd. over Intermittent StreamFairAdams County · Built 1900
- Ralston-Benge RD over Dry WashFairAdams County · Built 1900
- Calloway RD over Dry WashFairAdams County · Built 1900
- Heinemann RD over Farrier CouleeGoodAdams County · Built 1900
- Arlt RD over Intermittent StreamFairAdams County · Built 1900
Newest
- I-90 EB over Sunset CreekGoodKing County · Built 2024
- I-90 WB over Sunset CreekGoodKing County · Built 2024
- Lk Wash BLVD/112th over I-405GoodKing County · Built 2024
- SR 3 over Chico CreekGoodKitsap County · Built 2024
- Lakemont Blvd. SE over Coal CreekGoodKing County · Built 2024
Who owns Washington's bridges
| County | 3,426 | 40.2% |
| State | 3,406 | 40.0% |
| City | 841 | 9.9% |
| Federal | 809 | 9.5% |
| Local | 28 | 0.3% |
| Railroad | 5 | 0.1% |
| Toll Authority | 3 | 0.0% |
| Unknown | 1 | 0.0% |
| Private | 1 | 0.0% |
More Washington facts
Total bridge length321 miles
Total deck area77,554,911 sq ft
Culverts counted as bridges617 (7%)
On the National Highway System2,629
Posted with load limits818
Closed to traffic19
Listed or eligible for the National Register108
Average daily traffic per bridge8,062 vehicles
Newest structure2024