Fergus County Bridge Report Card

Fergus County scores 75 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C75 / 100

Local infrastructure snapshot

Fergus County, Montana

Fergus County has 158 bridges in the National Bridge Inventory, with 9 rated poor and 9 rated scour-critical. Its poor-condition share of 5.7% is at or below the 7.4% statewide average. Poor-condition bridges carry about 2,942 daily vehicle crossings.

158Total Bridges

9Poor (5.7%)

97Fair (61.4%)

9Scour-Critical

Quote-Ready Local Facts

5.7%of county bridges are in poor condition, compared with 7.4% statewide and 6.7% nationally.

2,942daily vehicle crossings are on poor-condition bridges in the county.

9bridges are rated scour-critical, or 5.7% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Fergus County a Bridge Condition Exposure Score of 75/100 (C). The county has 158 bridges in the National Bridge Inventory, including 9 in poor condition and 9 rated scour-critical. Poor-condition bridges carry about 2,942 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	5.7%	11.4
Poor-condition traffic exposure	25	3.4% of measured traffic	2.5
Scour-critical bridge share	20	5.7%	11.4
Average age vs national baseline	10	47 years vs 48 nationally	0.0
Traffic-data completeness	5	87,503 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	5.7%
State Poor-Condition Share	7.4%
National Poor-Condition Share	6.7%
County Scour-Critical Share	5.7%
Average Bridge Age	47 years
Poor-Condition Traffic Exposure	2,942 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 87 over Drainage — 1,067 vehicles/day Oldest Listed BridgePoor Farm Loop over Big Spring Creek — built in 1908 All County BridgesBrowse every bridge record in Fergus County.

Top Bridges to Watch in Fergus County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 87 over Drainage	Poor condition + traffic exposure	Poor	1,067	1939
US 191 over Missouri River	Poor condition + traffic exposure	Poor	655	1959
6th AVE S over Big Spring Creek 133	Poor condition + traffic exposure	Poor	437	1962
US 191 over Box Elder Creek	Poor condition + traffic exposure	Poor	382	1942
N Dawes Street over Big Spring Creek 061	Poor condition + traffic exposure	Poor	100	1940
W Broadway Street over Big Spring Creek 062	Poor condition + traffic exposure	Poor	100	1940
Fairview RD over S Fork Mcdonald CR 123	Poor condition + traffic exposure	Poor	100	1962
Third Avenue S over Little Casino Creek 138	Poor condition + traffic exposure	Poor	100	2006
Road 220 over Carroll Coulee	Poor condition + traffic exposure	Poor	1	1963
Stafford Ferry RD over Taffy Creek	Scour-critical foundation rating	Good	168	2020

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.