Stanley County Bridge Report Card

Stanley County scores 42 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F42 / 100

Local infrastructure snapshot

Stanley County, South Dakota

Stanley County has 37 bridges in the National Bridge Inventory, with 6 rated poor and 8 rated scour-critical. Its poor-condition share of 16.2% is above the 16.1% statewide average. Poor-condition bridges carry about 580 daily vehicle crossings.

37Total Bridges

6Poor (16.2%)

18Fair (48.6%)

8Scour-Critical

Quote-Ready Local Facts

16.2%of county bridges are in poor condition, compared with 16.1% statewide and 6.7% nationally.

580daily vehicle crossings are on poor-condition bridges in the county.

8bridges are rated scour-critical, or 21.6% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Stanley County a Bridge Condition Exposure Score of 42/100 (F). The county has 37 bridges in the National Bridge Inventory, including 6 in poor condition and 8 rated scour-critical. Poor-condition bridges carry about 580 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	16.2%	32.4
Poor-condition traffic exposure	25	2.8% of measured traffic	2.1
Scour-critical bridge share	20	21.6%	20.0
Average age vs national baseline	10	56 years vs 48 nationally	3.4
Traffic-data completeness	5	20,732 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	16.2%
State Poor-Condition Share	16.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	21.6%
Average Bridge Age	56 years
Poor-Condition Traffic Exposure	580 vehicles/day

Bridges to Watch

Busiest Poor-Condition BridgeFas 3214 over Dan Powell Ck — 210 vehicles/day Oldest Listed BridgeHWY 63 Service RD over Cottonwood Ck — built in 1920 All County BridgesBrowse every bridge record in Stanley County.

Top Bridges to Watch in Stanley County

Bridge	Reason	Condition	Daily Traffic	Year Built
Fas 3214 over Dan Powell Ck	Poor condition + traffic exposure	Poor	210	1936
Us014 Ef over Prairie Dog Ck	Poor condition + traffic exposure	Poor	50	1920
Us014 Ef over Little Prairie Dog Ck	Poor condition + traffic exposure	Poor	50	1920
291st AVE over Antelope Ck	Poor condition + traffic exposure	Poor	130	1935
Stae Highway 1806 over Oahe Dam Spillway	Poor condition + traffic exposure	Poor	123	1963
Pleasant Valley RD over Lance Ck	Poor condition + traffic exposure	Poor	17	1930
Us083 over Bad Rv	Scour-critical foundation rating	Fair	6,040	1956
Us014 over Plum Ck	Scour-critical foundation rating	Fair	624	1960
Us014 over Little Prairie Dog Ck	Scour-critical foundation rating	Good	592	1960
Fas 3214 over Bad Rv	Scour-critical foundation rating	Fair	210	1990

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.