Grant County Bridge Report Card

Grant County scores 71 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C71 / 100

Local infrastructure snapshot

Grant County, Oregon

Grant County has 145 bridges in the National Bridge Inventory, with 6 rated poor and 34 rated scour-critical. Its poor-condition share of 4.1% is at or below the 5.1% statewide average. Poor-condition bridges carry about 363 daily vehicle crossings.

145Total Bridges

6Poor (4.1%)

70Fair (48.3%)

34Scour-Critical

Quote-Ready Local Facts

4.1%of county bridges are in poor condition, compared with 5.1% statewide and 6.7% nationally.

363daily vehicle crossings are on poor-condition bridges in the county.

34bridges are rated scour-critical, or 23.4% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Grant County a Bridge Condition Exposure Score of 71/100 (C). The county has 145 bridges in the National Bridge Inventory, including 6 in poor condition and 34 rated scour-critical. Poor-condition bridges carry about 363 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	4.1%	8.3
Poor-condition traffic exposure	25	0.7% of measured traffic	0.5
Scour-critical bridge share	20	23.4%	20.0
Average age vs national baseline	10	45 years vs 48 nationally	0.0
Traffic-data completeness	5	51,044 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	4.1%
State Poor-Condition Share	5.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	23.4%
Average Bridge Age	45 years
Poor-Condition Traffic Exposure	363 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeNugget Street over Canyon Creek — 111 vehicles/day Oldest Listed BridgeC15-long Creek RD over N.fork John Day River — built in 1899 All County BridgesBrowse every bridge record in Grant County.

Top Bridges to Watch in Grant County

Bridge	Reason	Condition	Daily Traffic	Year Built
Nugget Street over Canyon Creek	Poor condition + traffic exposure	Poor	111	1972
County RD 18 over Long Creek	Poor condition + traffic exposure	Poor	21	1974
4550000 Road over Badger Creek	Poor condition + traffic exposure	Poor	100	1998
Nfsr over Bear Creek - Crab	Poor condition + traffic exposure	Poor	80	1971
C57-morgan RD over John Day R(morgan Br)	Poor condition + traffic exposure	Poor	31	1976
2635000 over John Day River	Poor condition + traffic exposure	Poor	20	1963
US 26 (hwy 005) over Beech Cr(mt Vernon)	Scour-critical foundation rating	Fair	2,836	1956
US 26 (hwy 005) over Dixie Crk (prairie City)	Scour-critical foundation rating	Fair	2,104	1939
US 26 (hwy 005) over Indian Creek	Scour-critical foundation rating	Fair	1,893	1939
US 26 (hwy 005) over John Day R(prairie City)	Scour-critical foundation rating	Fair	1,893	1939

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.