Bridge conditions in Kittitas County, Washington

313 inventoried bridges · 35 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
• 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.

Busiest bridges in the county

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

Every bridge in Kittitas County → - all 313, busiest first, each with its own condition record.

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.