Logan County Bridge Report Card

Logan County scores 53 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F53 / 100

Local infrastructure snapshot

Logan County, North Dakota

Logan County has 13 bridges in the National Bridge Inventory, with 2 rated poor and 1 rated scour-critical. Its poor-condition share of 15.4% is above the 11.1% statewide average. Poor-condition bridges carry about 29 daily vehicle crossings.

13Total Bridges

2Poor (15.4%)

2Fair (15.4%)

1Scour-Critical

Quote-Ready Local Facts

15.4%of county bridges are in poor condition, compared with 11.1% statewide and 6.7% nationally.

29daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 7.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Logan County a Bridge Condition Exposure Score of 53/100 (F). The county has 13 bridges in the National Bridge Inventory, including 2 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 29 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	15.4%	30.8
Poor-condition traffic exposure	25	1.7% of measured traffic	1.3
Scour-critical bridge share	20	7.7%	15.4
Average age vs national baseline	10	48 years vs 48 nationally	0.0
Traffic-data completeness	5	1,691 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	15.4%
State Poor-Condition Share	11.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	7.7%
Average Bridge Age	48 years
Poor-Condition Traffic Exposure	29 vehicles/day

Bridges to Watch

Busiest Poor-Condition Bridge77th ST SE over Creek — 24 vehicles/day Oldest Listed Bridge77th ST SE over Creek — built in 1939 All County BridgesBrowse every bridge record in Logan County.

Top Bridges to Watch in Logan County

Bridge	Reason	Condition	Daily Traffic	Year Built
77th ST SE over Creek	Poor condition + traffic exposure	Poor	24	1939
30th AVE SE over Beaver Creek	Poor condition + traffic exposure	Poor	5	1940
71st ST SE over Beaver Creek	Scour-critical foundation rating	Good	115	1961
Nd Highway 3 over Mckenna Coulee	High traffic	Good	700	1983
Nd Highway 3 over Beaver Creek	High traffic	Good	540	2024
37th AVE SE over Creek	High traffic	Fair	50	1948
71st ST SE over Beaver Creek	High traffic	Good	48	1980
71st ST SE over Beaver Creek	High traffic	Good	48	1983
71st ST SE over Beaver Creek	High traffic	Good	48	2018
26th AVE SE over Beaver Creek	High traffic	Good	40	1996

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.