Kittitas County Bridge Report Card

Kittitas County scores 53 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F53 / 100

Local infrastructure snapshot

Kittitas County, Washington

Kittitas County has 312 bridges in the National Bridge Inventory, with 35 rated poor and 14 rated scour-critical. Its poor-condition share of 11.2% is above the 5.6% statewide average. Poor-condition bridges carry about 312,038 daily vehicle crossings.

312Total Bridges

35Poor (11.2%)

145Fair (46.5%)

14Scour-Critical

Quote-Ready Local Facts

11.2%of county bridges are in poor condition, compared with 5.6% statewide and 6.7% nationally.

312,038daily vehicle crossings are on poor-condition bridges in the county.

14bridges are rated scour-critical, or 4.5% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Kittitas County a Bridge Condition Exposure Score of 53/100 (F). The county has 312 bridges in the National Bridge Inventory, including 35 in poor condition and 14 rated scour-critical. Poor-condition bridges carry about 312,038 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.

Download all county report-card scores as CSV.

How the Score Breaks Down

Factor	Weight	County Value	Penalty
Poor-condition bridge share	40	11.2%	22.4
Poor-condition traffic exposure	25	18.1% of measured traffic	13.6
Scour-critical bridge share	20	4.5%	9.0
Average age vs national baseline	10	52 years vs 48 nationally	1.7
Traffic-data completeness	5	1,726,569 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	11.2%
State Poor-Condition Share	5.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	4.5%
Average Bridge Age	52 years
Poor-Condition Traffic Exposure	312,038 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeI-90 over Coal Creek — 18,069 vehicles/day Oldest Listed BridgeUS 97 over Cascade Canal — built in 1900 All County BridgesBrowse every bridge record in Kittitas County.

Top Bridges to Watch in Kittitas County

Bridge	Reason	Condition	Daily Traffic	Year Built
I-90 over Kachess River	Poor condition + traffic exposure	Poor	17,108	1958
I-90 over Yakima River	Poor condition + traffic exposure	Poor	16,667	1959
I-90 over Yakima River	Poor condition + traffic exposure	Poor	16,667	1959
I-90 over Dry Creek	Poor condition + traffic exposure	Poor	15,974	1967
SR 10 over Teanaway River	Poor condition + traffic exposure	Poor	1,338	1930
I-90 over Coal Creek	Poor condition + traffic exposure	Poor	18,069	1956
I-90 over SR 906	Poor condition + traffic exposure	Poor	17,758	1969
I-90 over Yellowstone RD	Poor condition + traffic exposure	Poor	17,215	1969
I-90 over Dry Creek	Poor condition + traffic exposure	Poor	15,974	1967
I-90 over Umptanum RD	Poor condition + traffic exposure	Poor	15,658	1967

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.