Clatsop County Bridge Report Card

Clatsop County scores 63 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D63 / 100

Local infrastructure snapshot

Clatsop County, Oregon

Clatsop County has 155 bridges in the National Bridge Inventory, with 8 rated poor and 32 rated scour-critical. Its poor-condition share of 5.2% is above the 5.1% statewide average. Poor-condition bridges carry about 42,788 daily vehicle crossings.

155Total Bridges

8Poor (5.2%)

97Fair (62.6%)

32Scour-Critical

Quote-Ready Local Facts

5.2%of county bridges are in poor condition, compared with 5.1% statewide and 6.7% nationally.

42,788daily vehicle crossings are on poor-condition bridges in the county.

32bridges are rated scour-critical, or 20.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Clatsop County a Bridge Condition Exposure Score of 63/100 (D). The county has 155 bridges in the National Bridge Inventory, including 8 in poor condition and 32 rated scour-critical. Poor-condition bridges carry about 42,788 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	5.2%	10.3
Poor-condition traffic exposure	25	7.5% of measured traffic	5.6
Scour-critical bridge share	20	20.6%	20.0
Average age vs national baseline	10	51 years vs 48 nationally	1.5
Traffic-data completeness	5	569,130 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	5.2%
State Poor-Condition Share	5.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	20.6%
Average Bridge Age	51 years
Poor-Condition Traffic Exposure	42,788 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUs101 (hwy 9) over Columbia River — 9,117 vehicles/day Oldest Listed BridgeHWY 105 over Old Youngs Bay — built in 1921 All County BridgesBrowse every bridge record in Clatsop County.

Top Bridges to Watch in Clatsop County

Bridge	Reason	Condition	Daily Traffic	Year Built
Us101 (hwy 9) over Columbia River	Poor condition + traffic exposure	Poor	9,117	1966
HWY 105 over Old Youngs Bay	Poor condition + traffic exposure	Poor	7,781	1921
W Broadway over Necanicum Rv	Poor condition + traffic exposure	Poor	7,315	1924
HWY 105 over Lewis & Clark River	Poor condition + traffic exposure	Poor	6,367	1924
HWY 485 over Skipanon River	Poor condition + traffic exposure	Poor	6,271	1929
Us101 (hwy 9) over Arch Cape Creek	Poor condition + traffic exposure	Poor	5,508	1937
Klootchy Park Rd. over Necanicum River	Poor condition + traffic exposure	Poor	409	1960
Raymond RD over Klaskanine River	Poor condition + traffic exposure	Poor	20	1974
Us101 (hwy 9) over Shangri La Creek	Scour-critical foundation rating	Fair	16,793	1960
Us101 (hwy 9) over Necanicum River	Scour-critical foundation rating	Fair	14,464	1930

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.