Marion County Bridge Report Card

Marion County scores 61 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D61 / 100

Local infrastructure snapshot

Marion County, Oregon

Marion County has 375 bridges in the National Bridge Inventory, with 29 rated poor and 56 rated scour-critical. Its poor-condition share of 7.7% is above the 5.1% statewide average. Poor-condition bridges carry about 57,668 daily vehicle crossings.

375Total Bridges

29Poor (7.7%)

262Fair (69.9%)

56Scour-Critical

Quote-Ready Local Facts

7.7%of county bridges are in poor condition, compared with 5.1% statewide and 6.7% nationally.

57,668daily vehicle crossings are on poor-condition bridges in the county.

56bridges are rated scour-critical, or 14.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Marion County a Bridge Condition Exposure Score of 61/100 (D). The county has 375 bridges in the National Bridge Inventory, including 29 in poor condition and 56 rated scour-critical. Poor-condition bridges carry about 57,668 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	7.7%	15.5
Poor-condition traffic exposure	25	1.0% of measured traffic	0.7
Scour-critical bridge share	20	14.9%	20.0
Average age vs national baseline	10	54 years vs 48 nationally	2.6
Traffic-data completeness	5	6,036,076 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	7.7%
State Poor-Condition Share	5.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	14.9%
Average Bridge Age	54 years
Poor-Condition Traffic Exposure	57,668 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeWilco Road over Salem Ditch — 10,640 vehicles/day Oldest Listed BridgeFront Street NE over Mill Creek — built in 1913 All County BridgesBrowse every bridge record in Marion County.

Top Bridges to Watch in Marion County

Bridge	Reason	Condition	Daily Traffic	Year Built
Or 213 (hwy 160) over Abiqua Creek	Poor condition + traffic exposure	Poor	6,347	1934
West Stayton RD over Mill Creek	Poor condition + traffic exposure	Poor	3,417	1966
Hibbard RD over Drift Creek	Poor condition + traffic exposure	Poor	725	1964
Hibbard RD over Beaver Creek	Poor condition + traffic exposure	Poor	417	1964
Wilco Road over Salem Ditch	Poor condition + traffic exposure	Poor	10,640	1968
W Wash ST over Salem Ditch	Poor condition + traffic exposure	Poor	6,466	1975
Rambler DR SE over Little Pudding River	Poor condition + traffic exposure	Poor	5,800	1963
Marion Rd. SE over Sidney Ditch	Poor condition + traffic exposure	Poor	3,245	1962
Whiskey Hill RD over Overflow Pudding River	Poor condition + traffic exposure	Poor	3,061	1955
Monitor-mckee RD over Pudding River	Poor condition + traffic exposure	Poor	2,663	1950

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.