Okanogan County Bridge Report Card

Okanogan County scores 52 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F52 / 100

Local infrastructure snapshot

Okanogan County, Washington

Okanogan County has 161 bridges in the National Bridge Inventory, with 12 rated poor and 13 rated scour-critical. Its poor-condition share of 7.5% is above the 5.6% statewide average. Poor-condition bridges carry about 32,427 daily vehicle crossings.

161Total Bridges

12Poor (7.5%)

74Fair (46.0%)

13Scour-Critical

Quote-Ready Local Facts

7.5%of county bridges are in poor condition, compared with 5.6% statewide and 6.7% nationally.

32,427daily vehicle crossings are on poor-condition bridges in the county.

13bridges are rated scour-critical, or 8.1% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Okanogan County a Bridge Condition Exposure Score of 52/100 (F). The county has 161 bridges in the National Bridge Inventory, including 12 in poor condition and 13 rated scour-critical. Poor-condition bridges carry about 32,427 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	7.5%	14.9
Poor-condition traffic exposure	25	18.9% of measured traffic	14.2
Scour-critical bridge share	20	8.1%	16.1
Average age vs national baseline	10	54 years vs 48 nationally	2.3
Traffic-data completeness	5	171,504 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	7.5%
State Poor-Condition Share	5.6%
National Poor-Condition Share	6.7%
County Scour-Critical Share	8.1%
Average Bridge Age	54 years
Poor-Condition Traffic Exposure	32,427 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 97 over SR 155 — 8,828 vehicles/day Oldest Listed BridgeUS 97 over Dan Creek — built in 1900 All County BridgesBrowse every bridge record in Okanogan County.

Top Bridges to Watch in Okanogan County

Bridge	Reason	Condition	Daily Traffic	Year Built
SR 20 over Chewuch River	Poor condition + traffic exposure	Poor	3,696	1961
SR 153 over Methow River	Poor condition + traffic exposure	Poor	1,847	1939
SR 153 over Methow River	Poor condition + traffic exposure	Poor	1,847	1939
SR 20 over Early Winters Creek	Poor condition + traffic exposure	Poor	1,280	1964
US 97 over SR 155	Poor condition + traffic exposure	Poor	8,828	1964
US 97 over Watson Draw	Poor condition + traffic exposure	Poor	5,644	1965
SR 20 over Methow River	Poor condition + traffic exposure	Poor	4,683	1929
SR 153 over Methow River	Poor condition + traffic exposure	Poor	1,847	1939
SR 153 over Methow River	Poor condition + traffic exposure	Poor	1,847	1939
Fas Route A240 over Twisp River	Poor condition + traffic exposure	Poor	770	1949

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.