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Every bridge in Grant County, South Dakota

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

205 inventoried bridges, busiest first

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

Grant County, South Dakota, has 205 bridges in the 2025 National Bridge Inventory: 100 rated good, 67 fair, and 38 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 I029 over Indian Rv	1976	6,600	Fair
US012 over Whetstone Rv Div Channel	1955	3,765	Fair
Irr I029 N over 146 St	1977	3,650	Good
Irr I029 N over 149 St (fas 6266)	1976	3,650	Fair
Irr I029 S over 146 St	1977	3,650	Fair
Irr I029 S over 149 St (fas 6266)	1976	3,650	Fair
I029 N over 152 St	1976	3,605	Fair
I029 S over 152 St	1977	3,605	Fair
US012 over Whetstone Rv	2003	3,334	Good
2ND Avenue over BNSF Railroad	1914	2,560	Poor
US012 over Burlington Northern RR	2013	2,192	Good
US012 over N Fork Whetstone Ck	2013	2,192	Fair
SD015 over Trib N Fork Yellow Bank	2022	1,961	Good
SD015 over South Fork Whetstone Rv	1982	1,910	Fair
SD015 over Ck	2022	1,756	Fair
SD015 over North Fork Yellow Bank R	2023	1,756	Good
US012 over Ck	1997	1,470	Fair
US012 over Ck	1997	1,470	Fair
US012 over South Fork Whetstone Rv	1997	1,470	Fair
US012 over Ck	1994	1,358	Fair
SD015 over Br Whetstone Rv	1957	1,321	Fair
SD015 over North Fork Whetstone Rv	1957	1,321	Fair
SD020 over Ck	2021	1,284	Good
SD020 over Ck	2021	1,284	Fair
SD020 over Ck	2021	1,284	Good
SD020 over South Fork Yellow Bank R	2021	1,284	Good
SD109 over Burlington Northern RR	1983	1,166	Fair
SD020 over Ck	1956	702	Fair
W. Milbank St-milb over South Fork Whetstone Rv	1984	696	Poor
472 Avenue over Yellow Br Ck	1950	445	Fair
480 Avenue over South Fork Whetstone Rv	2024	410	Good
485 Avenue over Burlington Northern RR	1978	397	Fair
145 Street over Whetstone Rv	1959	374	Fair
145 Street over North Fork Whetstone Rv	1966	370	Fair
472 Avenue over Ck	2006	341	Good
472 Avenue over South Fork Whetstone Rv	1973	341	Fair
482 Avenue over Ck	1930	336	Fair
472 Avenue over Trib to S Fork Whetstone	2021	332	Good
480 Avenue over Ck	2023	327	Good
482 Ave over Ck	1930	290	Fair
482 Ave over South Fork Yellow Bank R	2017	290	Good
482 Avenue over South Fork Yellow Bank R	2017	290	Good
SD123 over Ck	1988	280	Fair
SD123 over Ck	1988	280	Fair
SD158 over Ck	1966	275	Fair
SD158 over Ck	1966	275	Fair
SD158 over North Fork Yellow Bank R	1966	275	Fair
482 Avenue over North Fork Yellow Bank R	2024	258	Good
149 Street over Big Sioux Rv	2023	250	Good
161ST Str over Ck	2000	250	Good
455 Avenue over Ck	1940	250	Fair
SD020 over Ck	1956	244	Fair
SD020 over Ck	1956	244	Fair
455 Avenue over Ck	1939	238	Fair
472 Avenue over North Fork Yellow Bank R	2021	213	Good
486 Avenue over South Fork Yellow Bank R	1973	207	Fair
480 Avenue over North Fork Whetstone Rv	2018	200	Good
Main St-milbank over South Fork Whetstone Rv	1990	200	Fair
474TH Ave over Ck	2000	184	Good
476 Avenue over South Fork Yellow Bank R	2024	176	Good
482 Avenue over Ck	2018	159	Good
476 Avenue over Ck	1931	137	Fair
481 Avenue over North Fork Yellow Bank R	2024	137	Good
143 Street over Ck	1941	130	Fair
Main St-marvin over Burlington Northern RR	1940	125	Fair
147 Street over Ck	1926	100	Poor
147 Street over Ck	1926	100	Poor
471 Avenue over South Fork Whetstone Rv	2008	100	Good
475 Avenue over Ck	1938	100	Fair
475 Avenue over Ck	2021	100	Good
475 Avenue over North Fork Yellow Bank R	1938	100	Fair
163 Street over South Fork Yellow Bank R	1930	98	Poor
487 Avenue over Ck	2014	98	Good
480 Avenue over Ck	1969	96	Poor
146 Street over Ck	1948	95	Fair
470 Avenue over Ck	2001	95	Good
155 St over Ck	2003	75	Good
475 Avenue over Ck	1965	75	Poor
155 Street over Ck	2000	70	Good
477 Avenue over Ck	2013	70	Good
474 Ave over Ck	2006	65	Good
480 Avenue over Ck	1993	65	Good
482 Avenue over Whetstone Rv	1978	57	Poor
144 Street over Ck	2024	55	Good
486 Avenue over Ck	1973	55	Fair
466 Avenue over Ck	1930	54	Poor
142 Street over Ck	1958	52	Poor
143 Street over Ck	1998	52	Good
143 Street over Ck	2001	52	Good
144 Street over North Fork Whetstone Rv	1965	52	Poor
146 Street over Ck	1931	52	Fair
148 Street over Big Sioux Rv	1930	52	Poor
150 St over Ck	2006	52	Good
150 St over Ck	2006	52	Good
150 Street over Big Sioux Rv	2010	52	Good
151 St over Ck	2003	52	Good
151 Street over North Fork Yellow Bank R	1965	52	Good
152 Street over Big Sioux Rv	1948	52	Fair
152 Street over Ck	1930	52	Fair
152 Street over Indian Rv	1932	52	Poor
153 Street over Ck	2012	52	Good
153 Street over Ck	1974	52	Fair
153 Street over Ck	2014	52	Good
154 Street over Big Sioux Rv	1992	52	Fair
154 Street over Big Sioux Rv Overflow	1992	52	Fair
155 Street over Ck	2002	52	Good
161 Street over S Fork Yellow Bank River	1940	52	Poor
161 Street over S Fork Yellow Bank River	1940	52	Poor
162 Street over Ck	2018	52	Good
164 Street over South Fork Yellow Bank R	1936	52	Fair
474 Avenue over Ck	2002	52	Good
474 Avenue over South Fork Whetstone Rv	1936	52	Fair
477 Avenue over North Fork Whetstone Rv	1936	52	Fair
479 Ave over North Fork Whetstone Rv	1993	52	Fair
479 Avenue over Ck	1996	52	Fair
479 Avenue over North Fork Yellow Bank R	2010	52	Good
480 Avenue over Ck	2002	52	Good
481 Ave over Ck	2005	52	Good
483 Avenue over Ck	2010	52	Good
483 Avenue over South Fork Yellow Bank R	2017	52	Good
484 Ave over Ck	2004	52	Good
485 Avenue over Ck	1955	52	Poor
481 Avenue over South Fork Whetstone Rv	2021	49	Good
147 St over South Fork Whetstone Rv	2006	45	Good
151 Street over Big Sioux Rv	1958	45	Poor
476 Avenue over North Fork Yellow Bank R	1964	43	Fair
156 Street over Ck	1935	40	Poor
159 St over South Fork Yellow Bank R	2005	40	Good
479 Avenue over South Fork Whetstone Rv	2003	40	Good
480 Ave over Ck	2003	40	Good
481 Ave over South Fork Yellow Bank R	2003	40	Good
481 Avenue over Ck	1930	40	Poor
485 Avenue over Ck	2008	40	Good
142 Street over Ck	2007	35	Good
145 St over Ck	2008	35	Good
148 Street over Ck	1992	35	Good
150 Street over Ck	1925	35	Poor
152 St over Ck	2005	35	Good
154 St over Ck	2005	35	Good
156 St over Ck	1901	35	Fair
156 Street over Ck	2008	35	Good
158 St over Ck	2006	35	Good
165 St over Ck	2018	35	Good
456 Avenue over Indian River	1960	35	Poor
458 Avenue over Ck	1936	35	Fair
470 Avenue over Ck	2016	35	Good
477 Avenue over North Fork Yellow Bank R	2007	35	Good
479 Ave over Ck	2005	35	Good
479 Ave over Ck	2005	35	Good
479 Ave over Ck	2005	35	Good
480 Avenue over North Fork Yellow Bank R	1966	35	Fair
481 Ave over Ck	2005	35	Fair
483 Ave over Ck	2003	35	Good
484 Avenue over Ck	2015	35	Good
485 Avenue over Ck	1948	35	Poor
485 Avenue over Ck	1950	35	Poor
485 Avenue over North Fork Yellow Bank R	1930	35	Poor
485 Avenue over South Fork Yellow Bank R	2017	35	Good
487 Avenue over North Fork Yellow Bank R	1958	35	Poor
157 Street over North Fork Yellow Bank R	1990	33	Good
153 Street over North Fork Yellow Bank R	1979	31	Fair
477 Avenue over South Fork Whetstone Rv	1989	30	Fair
477TH Ave over Ck	2000	30	Good
476 Avenue over Ck	1930	27	Poor
165 Street over South Fork Yellow Bank R	1940	26	Poor
452 Ave over Big Sioux Rv	2004	25	Good
452 Avenue over Big Sioux Rv	1996	25	Good
452 Avenue over Big Sioux Rv	2023	25	Good
453 Avenue over Big Sioux River	2021	25	Good
454 Avenue over Ck	2000	25	Good
468 Avenue over Ck	2009	25	Fair
469 Avenue over Ck	2012	25	Good
469 Avenue over Ck	1930	25	Poor
470 Ave over North Fork Whetstone Trb	2005	25	Good
471 Avenue over Ck	1926	25	Poor
473 Avenue over Ck	2012	25	Good
473 Avenue over Ck	1936	25	Poor
473 Avenue over South Fork Whetstone Rv	1942	25	Poor
474 Ave over Ck	1901	25	Poor
474 Avenue over Ck	2002	25	Good
474 Avenue over South Fork Yellow Bank R	1933	25	Fair
476 Avenue over South Fork Whetstone Rv	1999	25	Good
477 Ave over Ck	2004	25	Good
480 Avenue over Ck	2001	25	Fair
480 Avenue over South Fork Yellow Bank R	2002	25	Good
483 Avenue over Whetstone Rv	1962	25	Poor
479 Avenue over South Fork Yellow Bank R	2016	21	Good
454 Avenue over Indian River	1936	20	Poor
468 Avenue over Ck	2009	20	Fair
473 Avenue over Ck	2007	20	Good
474 Avenue over North Fork Yellow Bank R	2013	20	Fair
475 Avenue over South Fork Whetstone Rv	2008	20	Good
475TH Avenue over Ck	2000	20	Good
476 Ave over Ck	2024	20	Good
476 Avenue over Ck	2010	20	Good
476 Avenue over North Fork Yellow Bank R	2000	20	Good
476A Ave Center Rd over North Fork Yellow Bank R	2004	20	Good
477 Avenue over Ck	2014	20	Good
Center Road over Ck	1927	20	Poor
477 Avenue over Ck	1965	18	Poor
484 Avenue over South Fork Yellow Bank R	2012	16	Good
474 Avenue over Ck	1926	15	Poor
452 Ave over Indian Rv	2004	12	Good
160 Street over Ck	1991	10	Poor
476 Avenue over Ck	2024	10	Good

Source: FHWA National Bridge Inventory, 2025.

Grant 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.