Rosebud County Bridge Report Card

Rosebud County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B81 / 100

Local infrastructure snapshot

Rosebud County, Montana

Rosebud County has 112 bridges in the National Bridge Inventory, with 7 rated poor and 2 rated scour-critical. Its poor-condition share of 6.2% is at or below the 7.4% statewide average. Poor-condition bridges carry about 1,114 daily vehicle crossings.

112Total Bridges

7Poor (6.2%)

87Fair (77.7%)

2Scour-Critical

Quote-Ready Local Facts

6.2%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

1,114daily vehicle crossings are on poor-condition bridges in the county.

2bridges are rated scour-critical, or 1.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Rosebud County a Bridge Condition Exposure Score of 81/100 (B). The county has 112 bridges in the National Bridge Inventory, including 7 in poor condition and 2 rated scour-critical. Poor-condition bridges carry about 1,114 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	6.2%	12.5
Poor-condition traffic exposure	25	1.3% of measured traffic	1.0
Scour-critical bridge share	20	1.8%	3.6
Average age vs national baseline	10	52 years vs 48 nationally	1.8
Traffic-data completeness	5	83,491 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	6.2%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	1.8%
Average Bridge Age	52 years
Poor-Condition Traffic Exposure	1,114 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 12 over Drainage — 222 vehicles/day Oldest Listed BridgeSand Creek RD over Sand Creek 031 — built in 1925 All County BridgesBrowse every bridge record in Rosebud County.

Top Bridges to Watch in Rosebud County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 12 over Drainage	Poor condition + traffic exposure	Poor	222	1941
US 12 over Drainage	Poor condition + traffic exposure	Poor	222	1947
US 12 over Drainage	Poor condition + traffic exposure	Poor	214	1938
Frontage Road 303 over Graveyard Creek 055	Poor condition + traffic exposure	Poor	128	1928
Old HWY 10 over Sweeney Creek 064	Poor condition + traffic exposure	Poor	128	1930
County Road 105 over W Blacktail Creek 007	Poor condition + traffic exposure	Poor	100	1940
Wendel Kincheloe R over Rattlesnake Creek 002	Poor condition + traffic exposure	Poor	100	1950
IRR over Tongue River	Scour-critical foundation rating	Fair	877	1970
S 332 over Drainage	Scour-critical foundation rating	Fair	29	1986
IRR BIA RTE 6 over Lame Deer Creek	High traffic	Good	3,000	1976

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.