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Every bridge in Corson County, South Dakota

Name: Every bridge in Corson County, South Dakota
Creator: Bridge Report Card
License: https://creativecommons.org/publicdomain/zero/1.0/

49 inventoried bridges, busiest first

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

Corson County, South Dakota, has 49 bridges in the 2025 National Bridge Inventory: 19 rated good, 26 fair, and 4 poor (as of August 20, 2026).
This index lists every one of them, busiest first; each links to its own condition record.

Bridge	Built	Vehicles/day	Condition
Irr US012 over Claymore Ck	1958	1,378	Poor
Irr US012 over Br Snake Ck	1965	1,091	Fair
Irr US012 over Deep Bank Ck	1965	1,091	Fair
Irr US012 over Snake Ck	1966	1,091	Fair
Irr SD020 over Ck	2000	956	Good
Irr SD063 over Ck	1980	864	Good
Irr SD063 over Oak Ck	1980	864	Fair
Irr SD1806 over Burlington Northern RR	1973	826	Fair
Irr SD1806 over Oahe Lk (grand Rv)	1963	826	Fair
Irr US012 over Ck	1964	636	Fair
Irr US012 over Grand Rv	1960	636	Fair
Irr SD065 over Firesteel Ck	1961	533	Fair
Irr US012 over Burlington Northern RR	2024	470	Good
Irr US012 over Br Hay Ck	1962	424	Fair
Irr US012 over Burlington Northern RR	2024	424	Good
Irr US012 over Hay Ck	1962	424	Fair
Irr US012 over Hay Ck	2024	424	Good
Irr US012 over Ck	1964	391	Fair
Irr US012 over Ck	1991	391	Good
Irr US012 over Dry Run Ck	1964	391	Fair
Irr SD1806 over Oak Ck	1963	368	Fair
Irr SD073 over Burlington Northern RR	1977	274	Good
Irr SD065 over Grand Rv	2012	234	Good
Irr SD065 over Hump Ck	1956	234	Fair
Irr SD065 over White Shirt Ck	1956	234	Fair
Irr SD063 over Grand Rv	1970	220	Fair
Irr Bia Rte 44 over West Fork of Oak Creek	1961	213	Fair
Irr Bia Rte 21 over Rock Creek	1971	203	Good
Kenel Road over Oak Creek	1968	156	Fair
Irr Bia Rte 4 over Little Oak Creek	2002	116	Good
Irr Bia Rte 4 over Highbank Creek Bridge	2008	109	Good
Irr Bia Rte 2 over Stink Creek	1960	101	Fair
220TH Avenue over Hay Creek	1977	100	Fair
Irr Bia Rte 44 over North Fork of Oak Creek	1961	100	Fair
Irr Bia Rte 44 over Oak Creek	2010	100	Good
Irr Bia Rte 4 over Fire Steel Creek	1987	45	Good
104TH Street over Hump Creek	1930	30	Poor
211TH Avenue over Black Horse Butte Ck	1999	30	Good
230TH Avenue over Dirt Lodge Creek	1988	30	Fair
237TH Avenue over Firesteel Creek	2007	30	Good
County Road over Hump Creek	1974	30	Fair
Morristown Road over Grand River	1981	30	Fair
Township Road over Dirt Lodge Creek	1932	30	Poor
West Bullhead Road over White Shirt Creek	2016	30	Good
107TH Street over Oak Creek	2005	25	Good
Corson County 35 over Grand River	1990	20	Poor
Twin Butte Road over Grand River	1990	20	Good
Township Road over Hay Creek	1935	15	Fair
Twin Butte Road over Trib. to Blk Horse Butte	2005	14	Good

Source: FHWA National Bridge Inventory, 2025.

Corson County bridge conditions · South Dakota bridges by county.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.