Sherman County Bridge Report Card

Sherman County scores 66 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

D66 / 100

Local infrastructure snapshot

Sherman County, Oregon

Sherman County has 48 bridges in the National Bridge Inventory, with 2 rated poor and 11 rated scour-critical. Its poor-condition share of 4.2% is at or below the 5.1% statewide average. Poor-condition bridges carry about 344 daily vehicle crossings.

48Total Bridges

2Poor (4.2%)

33Fair (68.8%)

11Scour-Critical

Quote-Ready Local Facts

4.2%of county bridges are in poor condition, compared with 5.1% statewide and 6.7% nationally.

344daily vehicle crossings are on poor-condition bridges in the county.

11bridges are rated scour-critical, or 22.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Sherman County a Bridge Condition Exposure Score of 66/100 (D). The county has 48 bridges in the National Bridge Inventory, including 2 in poor condition and 11 rated scour-critical. Poor-condition bridges carry about 344 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	4.2%	8.3
Poor-condition traffic exposure	25	0.2% of measured traffic	0.1
Scour-critical bridge share	20	22.9%	20.0
Average age vs national baseline	10	63 years vs 48 nationally	6.0
Traffic-data completeness	5	186,005 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	4.2%
State Poor-Condition Share	5.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	22.9%
Average Bridge Age	63 years
Poor-Condition Traffic Exposure	344 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeBlagg Lane over Grass Valley Canyon — 301 vehicles/day Oldest Listed BridgeMoore ST over Barnum Canyon — built in 1900 All County BridgesBrowse every bridge record in Sherman County.

Top Bridges to Watch in Sherman County

Bridge	Reason	Condition	Daily Traffic	Year Built
Blagg Lane over Grass Valley Canyon	Poor condition + traffic exposure	Poor	301	1957
Mud Hollow Rd. over Mud Hollow Creek	Poor condition + traffic exposure	Poor	43	1970
US 97 (hwy 042) over Columbia River	Scour-critical foundation rating	Fair	6,042	1962
US 97 (hwy 042) over Spanish Hollow Creek	Scour-critical foundation rating	Fair	3,651	1963
US 97 (hwy 042) over Spanish Hollow Creek	Scour-critical foundation rating	Fair	3,651	1963
US 97 (hwy 042) over Spanish Hollow Creek	Scour-critical foundation rating	Fair	3,651	1963
US 97 (hwy 042) over Spanish Hollow Creek	Scour-critical foundation rating	Fair	3,651	1963
E. 2nd Street over Gurkin Canyon Creek	Scour-critical foundation rating	Fair	600	1920
HWY 301 over Fulton Canyon Creek	Scour-critical foundation rating	Fair	551	1966
Or 206 (hwy 300) over John Day River	Scour-critical foundation rating	Fair	408	1962

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.