Fallon County Bridge Report Card

Fallon County scores 76 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C76 / 100

Local infrastructure snapshot

Fallon County, Montana

Fallon County has 38 bridges in the National Bridge Inventory, with 2 rated poor and 0 rated scour-critical. Its poor-condition share of 5.3% is at or below the 7.4% statewide average. Poor-condition bridges carry about 2,241 daily vehicle crossings.

38Total Bridges

2Poor (5.3%)

19Fair (50.0%)

0Scour-Critical

Quote-Ready Local Facts

5.3%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

2,241daily vehicle crossings are on poor-condition bridges in the county.

0bridges are rated scour-critical, or 0.0% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Fallon County a Bridge Condition Exposure Score of 76/100 (C). The county has 38 bridges in the National Bridge Inventory, including 2 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 2,241 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	5.3%	10.5
Poor-condition traffic exposure	25	18.4% of measured traffic	13.8
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	28 years vs 48 nationally	0.0
Traffic-data completeness	5	12,179 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	5.3%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	28 years
Poor-Condition Traffic Exposure	2,241 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeS 7-main ST N over Sandstone Creek — 2,209 vehicles/day Oldest Listed BridgeUS 12 over Hay Creek — built in 1932 All County BridgesBrowse every bridge record in Fallon County.

Top Bridges to Watch in Fallon County

Bridge	Reason	Condition	Daily Traffic	Year Built
S 7-main ST N over Sandstone Creek	Poor condition + traffic exposure	Poor	2,209	1941
Cabin Creek Loop over Cabin Creek 057	Poor condition + traffic exposure	Poor	32	1980
Lake ST over Baker Lake Overflow	High traffic	Good	2,393	2009
US 12 over Drainage	High traffic	Fair	1,600	1998
US 12 over Timber Creek	High traffic	Fair	825	1998
US 12 over Sandstone Creek	High traffic	Fair	753	1998
US 12 over Rr	High traffic	Fair	696	1968
US 12 over Hay Creek	High traffic	Fair	516	1932
US 12 over O`fallon Creek	High traffic	Fair	516	1971
US 12 over Sandstone Creek	High traffic	Fair	498	1971

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.