Bridge conditions in Kittitas County, Washington
313 inventoried bridges · 35 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 313 Kittitas County bridges in the federal inventory, 35 carry a poor rating. That 11.2% share is roughly 2x the national average.
- 35 of the 313 bridges in Kittitas County, Washington, are rated in poor condition (11.2%) in the 2025 National Bridge Inventory, as of .
- 133 bridges (42.5%) are rated good and 145 (46.3%) fair.
- The median Kittitas County bridge was built in 1968.
- The busiest poor-rated bridge is I-90 over Coal Creek (built 1956), carrying about 18,069 vehicles a day.
Good 42.5% · Fair 46.3% · Poor 11.2% of 313 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-90 over Coal Creek | 1956 | 18,069 | Poor |
| I-90 over SR 906 | 1969 | 17,758 | Poor |
| I-90 over Yellowstone Rd | 1969 | 17,215 | Poor |
| I-90 over Kachess River | 1958 | 17,108 | Poor |
| I-90 over Yakima River | 1959 | 16,667 | Poor |
| I-90 over Yakima River | 1959 | 16,667 | Poor |
| I-90 over Dry Creek | 1967 | 15,974 | Poor |
| I-90 over Dry Creek | 1967 | 15,974 | Poor |
| I-90 over Umptanum Rd | 1967 | 15,658 | Poor |
| I-90 over Wilson Creek | 1967 | 15,658 | Poor |
| I-90 over Taneum CR | 1965 | 14,959 | Poor |
| I-90 over West Side Canal | 1966 | 14,959 | Poor |
| I-90 over Lower Peoh Pt Rd & Trail | 1965 | 14,717 | Poor |
| I-90 over Lower Peoh Pt Rd & Trail | 1965 | 14,717 | Poor |
| I-90 over Highline Canal | 1965 | 14,717 | Poor |
| I-90 over S Cle Elum Rd & BNSF RR | 1966 | 14,587 | Poor |
| I-82 over Burbank Creek | 1970 | 10,035 | Poor |
| I-82 over Military Rd | 1971 | 9,941 | Poor |
| I-82 over SR 821 Whipple Wasteway | 1970 | 9,791 | Poor |
| University Way over B.n. Railroad | 1966 | 8,962 | Poor |
| I-82 over I-90 | 1968 | 4,973 | Poor |
| I-82 over E-e Ramp I-90 | 1968 | 4,973 | Poor |
| Reecer Creek Road over Town Ditch | 1924 | 1,825 | Poor |
| SR 10 over Swauk CR | 1930 | 1,512 | Poor |
| SR 10 over Abandoned Cascade RR | 1947 | 1,512 | Poor |
| SR 10 over Teanaway River | 1930 | 1,338 | Poor |
| West Easton Rd over I-90 | 1975 | 802 | Poor |
| Dry Creek Road over Currier Creek | 1930 | 449 | Poor |
| Mcmanamy Road over Dry Creek | 1936 | 120 | Poor |
| Ringer Loop over Spring Creek | 1980 | 119 | Poor |
| Road over North Fork Taneum | 1957 | 100 | Poor |
| Road over Gold Creek | 1960 | 60 | Poor |
| Road over Log Creek | 1962 | 50 | Poor |
| Road over Cabin Creek | 1961 | 50 | Poor |
| Ross Road over Turbine Canal | 1991 | 22 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-90 over Coal Creek | 1928 | 18,069 | Fair |
| I-90 over Coal Creek | 1956 | 18,069 | Poor |
| I-90 over Animal Crossing | 2010 | 18,069 | Good |
| I-90 over Animal Crossing | 2012 | 18,069 | Good |
| I-90 over Gold Creek | 2011 | 18,069 | Fair |
| I-90 over Gold Creek | 2012 | 18,069 | Good |
| I-90 over Rocky Run Creek | 2011 | 18,069 | Good |
| I-90 over Rocky Run Creek | 2012 | 18,069 | Good |
| I-90 over Wolfe Creek | 2011 | 18,069 | Good |
| I-90 over Wolfe Creek | 2012 | 18,069 | 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.