Codington County Bridge Report Card

Codington County scores 37 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.

F37 / 100

Local infrastructure snapshot

Codington County, South Dakota

Codington County has 75 bridges in the National Bridge Inventory, with 14 rated poor and 7 rated scour-critical. Its poor-condition share of 18.7% is above the 16.1% statewide average. Poor-condition bridges carry about 11,571 daily vehicle crossings.

75Total Bridges

14Poor (18.7%)

46Fair (61.3%)

7Scour-Critical

Quote-Ready Local Facts

18.7%of county bridges are in poor condition, compared with 16.1% statewide and 6.7% nationally.

11,571daily vehicle crossings are on poor-condition bridges in the county.

7bridges are rated scour-critical, or 9.3% of the county bridge inventory.

Copyable Facts for Reporters

BridgeLookup.com gives Codington County a Bridge Condition Exposure Score of 37/100 (F). The county has 75 bridges in the National Bridge Inventory, including 14 in poor condition and 7 rated scour-critical. Poor-condition bridges carry about 11,571 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	18.7%	37.3
Poor-condition traffic exposure	25	8.6% of measured traffic	6.4
Scour-critical bridge share	20	9.3%	18.7
Average age vs national baseline	10	49 years vs 48 nationally	0.5
Traffic-data completeness	5	135,296 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	18.7%
State Poor-Condition Share	16.1%
National Poor-Condition Share	6.7%
County Scour-Critical Share	9.3%
Average Bridge Age	49 years
Poor-Condition Traffic Exposure	11,571 vehicles/day

Bridges to Watch

Busiest Poor-Condition Bridge14th Ave. N Wtn. over Big Sioux Rv — 4,970 vehicles/day Oldest Listed Bridge167 Street over Willow Ck — built in 1910 All County BridgesBrowse every bridge record in Codington County.

Top Bridges to Watch in Codington County

Bridge	Reason	Condition	Daily Traffic	Year Built
455 Avenue over Mahoney Ck	Poor condition + traffic exposure	Poor	1,167	1940
455 Avenue over Ck	Poor condition + traffic exposure	Poor	672	1940
176 Street over Big Sioux Rv	Poor condition + traffic exposure	Poor	468	1971
14th Ave. N Wtn. over Big Sioux Rv	Poor condition + traffic exposure	Poor	4,970	1974
31 ST NE over Willow Creek	Poor condition + traffic exposure	Poor	1,904	1990
Sioux Conifer Road over Big Sioux Rv	Poor condition + traffic exposure	Poor	1,499	1940
460 Avenue over Willow Ck	Poor condition + traffic exposure	Poor	472	2001
167 Street over Willow Ck	Poor condition + traffic exposure	Poor	73	1910
177 Street over Big Sioux Rv	Poor condition + traffic exposure	Poor	73	1920
172 Street over Ck	Poor condition + traffic exposure	Poor	73	1940

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.