Big Stone County Bridge Report Card

Big Stone County scores 88 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

B88 / 100

Local infrastructure snapshot

Big Stone County, Minnesota

Big Stone County has 17 bridges in the National Bridge Inventory, with 1 rated poor and 0 rated scour-critical. Its poor-condition share of 5.9% is above the 4.5% statewide average. Poor-condition bridges carry about 10 daily vehicle crossings.

17Total Bridges

1Poor (5.9%)

6Fair (35.3%)

0Scour-Critical

Quote-Ready Local Facts

5.9%of county bridges are in poor condition, compared with 4.5% statewide and 6.7% nationally.

10daily 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 Big Stone County a Bridge Condition Exposure Score of 88/100 (B). The county has 17 bridges in the National Bridge Inventory, including 1 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 10 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%	11.8
Poor-condition traffic exposure	25	0.1% of measured traffic	0.1
Scour-critical bridge share	20	0.0%	0.0
Average age vs national baseline	10	42 years vs 48 nationally	0.0
Traffic-data completeness	5	12,417 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	4.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.0%
Average Bridge Age	42 years
Poor-Condition Traffic Exposure	10 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeT 149 over Five Mile Creek — 10 vehicles/day Oldest Listed BridgeT 148 over Five Mile Creek — built in 1921 All County BridgesBrowse every bridge record in Big Stone County.

Top Bridges to Watch in Big Stone County

Bridge	Reason	Condition	Daily Traffic	Year Built
T 149 over Five Mile Creek	Poor condition + traffic exposure	Poor	10	1968
US 12 over Minnesota River	High traffic	Fair	4,366	2012
US 75 over Stony Run	High traffic	Fair	1,527	1932
Csah 30 over Minnesota River	High traffic	Good	1,400	2007
US 12 over Stony Run	High traffic	Good	1,250	2021
Mn 7 over Five Mile Creek	High traffic	Fair	1,137	1934
Mn 28 over Co Ditch # 10	High traffic	Fair	1,035	1978
US 75 over Bnsf Rail	High traffic	Good	590	1992
US 12 over Ditch	High traffic	Good	544	2021
Csah 18 over E Toqua Lake Outlet	High traffic	Good	170	2002

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.