Niobrara County Bridge Report Card

Niobrara County scores 88 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B88 / 100

Local infrastructure snapshot

Niobrara County, Wyoming

Niobrara County has 34 bridges in the National Bridge Inventory, with 1 rated poor and 1 rated scour-critical. Its poor-condition share of 2.9% is at or below the 7.1% statewide average. Poor-condition bridges carry about 3 daily vehicle crossings.

34Total Bridges

1Poor (2.9%)

21Fair (61.8%)

1Scour-Critical

Quote-Ready Local Facts

2.9%of county bridges are in poor condition, compared with 7.1% statewide and 6.7% nationally.

3daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 2.9% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Niobrara County a Bridge Condition Exposure Score of 88/100 (B). The county has 34 bridges in the National Bridge Inventory, including 1 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 3 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	2.9%	5.9
Poor-condition traffic exposure	25	0.0% of measured traffic	0.0
Scour-critical bridge share	20	2.9%	5.9
Average age vs national baseline	10	37 years vs 48 nationally	0.0
Traffic-data completeness	5	22,915 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	2.9%
State Poor-Condition Share	7.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	2.9%
Average Bridge Age	37 years
Poor-Condition Traffic Exposure	3 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeNi Cnty RD 9 over Cheyenne River — 3 vehicles/day Oldest Listed BridgeNi Cnty RD 9 over Cheyenne River — built in 1920 All County BridgesBrowse every bridge record in Niobrara County.

Top Bridges to Watch in Niobrara County

Bridge	Reason	Condition	Daily Traffic	Year Built
Ni Cnty RD 9 over Cheyenne River	Poor condition + traffic exposure	Poor	3	1920
US 18 over Niobrara River	High traffic	Fair	2,942	1988
US 85 over Uprr	High traffic	Good	2,942	2016
US 18 over Stockpass	High traffic	Good	2,406	1970
US 18 over Old Woman Creek	High traffic	Fair	2,150	1971
US 18 over Old Woman Creek	High traffic	Fair	2,150	1987
US 18 over Mule Creek	High traffic	Fair	2,150	1988
US 85 over Cheyenne River	High traffic	Fair	1,084	1990
US 85 over Bobcat Creek	High traffic	Good	1,084	1991
US 85 over Robbers Roost Creek	High traffic	Fair	1,084	1992

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.