Polk County Bridge Report Card

Polk County scores 92 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

A92 / 100

Local infrastructure snapshot

Polk County, Minnesota

Polk County has 269 bridges in the National Bridge Inventory, with 8 rated poor and 1 rated scour-critical. Its poor-condition share of 3.0% is at or below the 4.5% statewide average. Poor-condition bridges carry about 2,031 daily vehicle crossings.

269Total Bridges

8Poor (3.0%)

94Fair (34.9%)

1Scour-Critical

Quote-Ready Local Facts

3.0%of county bridges are in poor condition, compared with 4.5% statewide and 6.7% nationally.

2,031daily vehicle crossings are on poor-condition bridges in the county.

1bridges are rated scour-critical, or 0.4% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Polk County a Bridge Condition Exposure Score of 92/100 (A). The county has 269 bridges in the National Bridge Inventory, including 8 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 2,031 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	3.0%	5.9
Poor-condition traffic exposure	25	1.4% of measured traffic	1.1
Scour-critical bridge share	20	0.4%	0.7
Average age vs national baseline	10	36 years vs 48 nationally	0.0
Traffic-data completeness	5	140,652 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	3.0%
State Poor-Condition Share	4.5%
National Poor-Condition Share	6.7%
County Scour-Critical Share	0.4%
Average Bridge Age	36 years
Poor-Condition Traffic Exposure	2,031 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeUS 75 over Sand Hill River — 1,100 vehicles/day Oldest Listed BridgeUS 75 over Stream — built in 1924 All County BridgesBrowse every bridge record in Polk County.

Top Bridges to Watch in Polk County

Bridge	Reason	Condition	Daily Traffic	Year Built
US 75 over Sand Hill River	Poor condition + traffic exposure	Poor	1,100	1995
Csah 7 over Red River Of The North	Poor condition + traffic exposure	Poor	532	1957
Csah 1 over Red River Of The North	Poor condition + traffic exposure	Poor	205	1939
Csah 6 over Lost River	Poor condition + traffic exposure	Poor	140	1967
T 530 over Bnsf Rr	Poor condition + traffic exposure	Poor	36	1925
T 209 over Sand Hill River	Poor condition + traffic exposure	Poor	8	1925
T 756 over Lost River	Poor condition + traffic exposure	Poor	6	1964
T 189 over Br Co Ditch 66	Poor condition + traffic exposure	Poor	4	1925
Csah 1 over Poplar River	Scour-critical foundation rating	Fair	660	1966
US 2 over Red River	High traffic	Fair	15,475	1963

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.