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20TH Ave S Bypass over Pelican Lake Channel

Codington County, South Dakota · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

20TH Ave S Bypass over Pelican Lake Channel in Codington County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
It was built in 2012, making it 13 years old at the 2025 inventory.
It carries about 100 vehicles a day (traffic count year 2022).
Its listed owner is a city or municipal highway agency.
It is one of 15 of the 75 inventoried bridges in Codington County rated good (20.0%); 14 (18.7%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings

Component	Rating (2025)	FHWA scale meaning
Culvert	7	Good condition


Structure	Continuous concrete culvert
Length	about 53 ft
Location	0.2E & 0.3S of Jct 20/212
NBI structure number	000000015179183
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the South Dakota department of transportation.

Bridge	Built	Vehicles/day	Condition
US212 over Big Sioux Rv	2019	14,592	Good
US212 Ser Rd over Ck	1970	12,968	Fair
US212 over Willow Ck	1970	10,862	Fair
US081 over Big Sioux Rv	1966	7,665	Fair
W Kemp Avenue over Big Sioux River	1935	5,053	Fair
14TH Ave. N Wtn. over Big Sioux Rv	1974	4,970	Poor