Coos County Bridge Report Card

Coos County scores 73 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C73 / 100

Local infrastructure snapshot

Coos County, Oregon

Coos County has 255 bridges in the National Bridge Inventory, with 8 rated poor and 35 rated scour-critical. Its poor-condition share of 3.1% is at or below the 5.1% statewide average. Poor-condition bridges carry about 3,852 daily vehicle crossings.

255Total Bridges

8Poor (3.1%)

160Fair (62.7%)

35Scour-Critical

Quote-Ready Local Facts

3.1%of county bridges are in poor condition, compared with 5.1% statewide and 6.7% nationally.

3,852daily vehicle crossings are on poor-condition bridges in the county.

35bridges are rated scour-critical, or 13.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Coos County a Bridge Condition Exposure Score of 73/100 (C). The county has 255 bridges in the National Bridge Inventory, including 8 in poor condition and 35 rated scour-critical. Poor-condition bridges carry about 3,852 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	3.1%	6.3
Poor-condition traffic exposure	25	0.8% of measured traffic	0.6
Scour-critical bridge share	20	13.7%	20.0
Average age vs national baseline	10	47 years vs 48 nationally	0.0
Traffic-data completeness	5	508,213 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	3.1%
State Poor-Condition Share	5.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	13.7%
Average Bridge Age	47 years
Poor-Condition Traffic Exposure	3,852 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeCounty RD 7a over Haynes Slough — 1,733 vehicles/day Oldest Listed BridgeUs101(hwy009) over Fourmile Creek — built in 1929 All County BridgesBrowse every bridge record in Coos County.

Top Bridges to Watch in Coos County

Bridge	Reason	Condition	Daily Traffic	Year Built
Fillmore AVE over Ferry Creek	Poor condition + traffic exposure	Poor	1,200	1960
County RD 153g over South Fork Coquille R.	Poor condition + traffic exposure	Poor	84	1979
County RD 7a over Haynes Slough	Poor condition + traffic exposure	Poor	1,733	1971
County RD 10a over Graydon-anderson/slough	Poor condition + traffic exposure	Poor	642	2000
County RD 118g over Noble Creek	Poor condition + traffic exposure	Poor	91	1970
Elk Creek Road over S Fk Coquille River	Poor condition + traffic exposure	Poor	50	1950
County RD 68 over South Slough	Poor condition + traffic exposure	Poor	27	1977
Hwy. 2300 over W. Fk. Millicoma River	Poor condition + traffic exposure	Poor	25	1984
Or 42 (hwy 035) over Overflow Channel	Scour-critical foundation rating	Fair	6,459	1970
Us101(hwy009) over Fourmile Creek	Scour-critical foundation rating	Fair	5,551	1929

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.