Cascade County Bridge Report Card

Cascade County scores 80 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B80 / 100

Local infrastructure snapshot

Cascade County, Montana

Cascade County has 185 bridges in the National Bridge Inventory, with 11 rated poor and 1 rated scour-critical. Its poor-condition share of 5.9% is at or below the 7.4% statewide average. Poor-condition bridges carry about 9,784 daily vehicle crossings.

185Total Bridges

11Poor (5.9%)

97Fair (52.4%)

1Scour-Critical

Quote-Ready Local Facts

5.9%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

9,784daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 0.5% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Cascade County a Bridge Condition Exposure Score of 80/100 (B). The county has 185 bridges in the National Bridge Inventory, including 11 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 9,784 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	5.9%	11.9
Poor-condition traffic exposure	25	2.6% of measured traffic	2.0
Scour-critical bridge share	20	0.5%	1.1
Average age vs national baseline	10	60 years vs 48 nationally	4.9
Traffic-data completeness	5	371,717 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	5.9%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.5%
Average Bridge Age	60 years
Poor-Condition Traffic Exposure	9,784 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 87 over Otter Creek — 2,314 vehicles/day Oldest Listed BridgeTruly Cutoff RD over Smith River 033 — built in 1908 All County BridgesBrowse every bridge record in Cascade County.

Top Bridges to Watch in Cascade County

Bridge	Reason	Condition	Daily Traffic	Year Built
Nfsr 839 over Belt Creek	Poor condition + traffic exposure	Poor	46	1954
US 87 over Otter Creek	Poor condition + traffic exposure	Poor	2,314	1959
US 87 over Otter Creek	Poor condition + traffic exposure	Poor	2,314	1959
US 87 over Otter Creek	Poor condition + traffic exposure	Poor	2,314	1959
Sun River RD over Sep West Hill-i 15 127	Poor condition + traffic exposure	Poor	1,364	1967
US 89 Fh 32 over Belt Creek	Poor condition + traffic exposure	Poor	833	1968
Old US 91 over Missouri River-rr 069	Poor condition + traffic exposure	Poor	316	1931
Old US HWY 91 over Little Muddy Creek 090	Poor condition + traffic exposure	Poor	100	1923
Sheep CR RD over Sheep Creek 097	Poor condition + traffic exposure	Poor	68	1950
Nfsr 487 over S Fk Judith River	Poor condition + traffic exposure	Poor	65	1958

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.