Big Horn County Bridge Report Card

Big Horn County scores 73 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C73 / 100

Local infrastructure snapshot

Big Horn County, Wyoming

Big Horn County has 91 bridges in the National Bridge Inventory, with 9 rated poor and 1 rated scour-critical. Its poor-condition share of 9.9% is above the 7.1% statewide average. Poor-condition bridges carry about 3,171 daily vehicle crossings.

91Total Bridges

9Poor (9.9%)

57Fair (62.6%)

1Scour-Critical

Quote-Ready Local Facts

9.9%of county bridges are in poor condition, compared with 7.1% statewide and 6.7% nationally.

3,171daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 1.1% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Big Horn County a Bridge Condition Exposure Score of 73/100 (C). The county has 91 bridges in the National Bridge Inventory, including 9 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 3,171 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	9.9%	19.8
Poor-condition traffic exposure	25	3.9% of measured traffic	2.9
Scour-critical bridge share	20	1.1%	2.2
Average age vs national baseline	10	53 years vs 48 nationally	2.1
Traffic-data completeness	5	81,474 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	9.9%
State Poor-Condition Share	7.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.1%
Average Bridge Age	53 years
Poor-Condition Traffic Exposure	3,171 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 14a over Sand Draw — 1,578 vehicles/day Oldest Listed BridgeBh Cnty RD 229 over Antelope Creek — built in 1926 All County BridgesBrowse every bridge record in Big Horn County.

Top Bridges to Watch in Big Horn County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 14a over Sand Draw	Poor condition + traffic exposure	Poor	1,578	1975
Wyo 31 over Nowood River	Poor condition + traffic exposure	Poor	688	1951
Bh Cnty RD 229 over Elk Creek	Poor condition + traffic exposure	Poor	343	1940
Bh Cnty RD 268 over Medicine Lodge Creek	Poor condition + traffic exposure	Poor	189	1970
Bh Cnty RD 72 over Shoshone River	Poor condition + traffic exposure	Poor	119	1926
Bh Cnty RD L55 over Big Horn River	Poor condition + traffic exposure	Poor	88	1930
Bh Cnty RD L32h over Red Gulch	Poor condition + traffic exposure	Poor	83	1950
Bh Cnty RD 196 over Unnamed Draw	Poor condition + traffic exposure	Poor	52	1983
Bh Cnty RD L31 over Shell Creek	Poor condition + traffic exposure	Poor	31	1950
Wyo 31 over Medicine Lodge Creek	Scour-critical foundation rating	Fair	216	1948

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.