Minnehaha County Bridge Report Card

Minnehaha County scores 72 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

C72 / 100

Local infrastructure snapshot

Minnehaha County, South Dakota

Minnehaha County has 394 bridges in the National Bridge Inventory, with 36 rated poor and 15 rated scour-critical. Its poor-condition share of 9.1% is at or below the 16.1% statewide average. Poor-condition bridges carry about 54,882 daily vehicle crossings.

394Total Bridges

36Poor (9.1%)

195Fair (49.5%)

15Scour-Critical

Quote-Ready Local Facts

9.1%of county bridges are in poor condition, compared with 16.1% statewide and 6.7% nationally.

54,882daily vehicle crossings are on poor-condition bridges in the county.

15bridges are rated scour-critical, or 3.8% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Minnehaha County a Bridge Condition Exposure Score of 72/100 (C). The county has 394 bridges in the National Bridge Inventory, including 36 in poor condition and 15 rated scour-critical. Poor-condition bridges carry about 54,882 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	9.1%	18.3
Poor-condition traffic exposure	25	2.4% of measured traffic	1.8
Scour-critical bridge share	20	3.8%	7.6
Average age vs national baseline	10	40 years vs 48 nationally	0.0
Traffic-data completeness	5	2,256,424 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	9.1%
State Poor-Condition Share	16.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	3.8%
Average Bridge Age	40 years
Poor-Condition Traffic Exposure	54,882 vehicles/day

Bridges to Watch

Busiest Poor-Condition Bridge49th Street over Big Sioux River — 13,800 vehicles/day Oldest Listed BridgeState Park RD over Split Rock Ck — built in 1908 All County BridgesBrowse every bridge record in Minnehaha County.

Top Bridges to Watch in Minnehaha County

Bridge	Reason	Condition	Daily Traffic	Year Built
258th ST HWY 130 over Big Sioux River	Poor condition + traffic exposure	Poor	2,419	1966
250th ST HWY 114 over Slip-up Creek	Poor condition + traffic exposure	Poor	965	1956
49th Street over Big Sioux River	Poor condition + traffic exposure	Poor	13,800	1979
S. Cliff Avenue over Big Sioux River	Poor condition + traffic exposure	Poor	9,363	1986
I090 W over Sd038	Poor condition + traffic exposure	Poor	8,815	1989
River Boulevard over Big Sioux River	Poor condition + traffic exposure	Poor	5,300	1975
Sd011 over West Pipestone Ck	Poor condition + traffic exposure	Poor	3,442	1953
Lamesa DR HWY 137 over Trib To Skunk Ck	Poor condition + traffic exposure	Poor	1,492	1982
472nd AVE HWY 133 over Trib To Big Sioux Rv	Poor condition + traffic exposure	Poor	1,204	1955
246th ST HWY 104 over Skunk Ck	Poor condition + traffic exposure	Poor	1,135	1953

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.