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Every bridge in Lyman County, South Dakota

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

114 inventoried bridges, busiest first

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

Lyman County, South Dakota, has 114 bridges in the 2025 National Bridge Inventory: 46 rated good, 56 fair, and 12 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
I090 E over SD090 L	1971	4,382	Good
I090 W over SD090 L	1971	4,382	Good
I090 E over 319 Ave	1971	3,955	Fair
I090 E over SD273	1970	3,955	Fair
I090 W over 319 Ave	1971	3,955	Fair
I090 W over SD273	1970	3,955	Fair
I090 E over 321 Ave	1971	3,852	Fair
I090 E over 324 Ave	1971	3,852	Fair
I090 W over 321 Ave	1971	3,852	Fair
I090 W over 324 Ave	1971	3,852	Fair
I090 E over 308 Ave	1970	3,839	Fair
I090 E over 310 Ave	1970	3,839	Fair
I090 E over 312 Ave	1970	3,839	Fair
I090 E over US183	1970	3,839	Fair
I090 W over 308 Ave	1970	3,839	Fair
I090 W over 310 Ave	1970	3,839	Fair
I090 W over 312 Ave	1970	3,839	Fair
I090 W over US183	1970	3,839	Good
I090 E over 305 Ave	1970	3,808	Good
I090 W over 305 Ave	1970	3,808	Fair
I090 E over 293 Ave	1970	3,803	Fair
I090 E over Sundance Rd	1970	3,803	Good
I090 W over 293 Ave	1970	3,803	Fair
I090 W over Sundance Rd	1970	3,803	Good
I090 E over SD248	2006	3,791	Good
I090 W over SD248	2006	3,791	Good
I090 E over 300 Ave	1970	3,787	Fair
I090 E over 303 Ave	1970	3,787	Fair
I090 W over 300 Ave	1970	3,787	Fair
I090 W over 303 Ave	1970	3,787	Fair
I090 E over American Crow Ck	1971	3,720	Good
I090 E over Big Ck I90 Wf	1971	3,720	Fair
I090 E over Cooper School Rd	1971	3,720	Good
I090 E over I90 Ef	1972	3,720	Good
I090 E over R&w RR	1971	3,720	Good
I090 E over SD047	1971	3,720	Fair
I090 W over American Crow Ck	1972	3,720	Good
I090 W over Big Ck I90 Wf	1971	3,720	Good
I090 W over Cooper School Rd	1971	3,720	Good
I090 W over I90 Ef	1972	3,720	Good
I090 W over R&w RR	1971	3,720	Good
I090 W over SD047	1971	3,720	Fair
US083 over I090	1970	2,868	Fair
I090 Wf over American Crow Ck	1954	2,622	Fair
I090 Wf over R&w RR	1953	2,622	Poor
US083 over Antelope Ck	2004	2,470	Good
US083 over Ck	1960	2,284	Fair
US083 over Ck	2003	2,284	Fair
US083 over Medicine Ck	2003	2,284	Fair
US083 over North Fork Medicine Ck	2003	2,284	Fair
Sd 248 Ef over Ck	1947	2,265	Fair
US183 over Mill Iron Ck	2005	689	Good
US183 over White Rv	2018	689	Fair
Irr Bia Rte 5 over Counselor Creek	1965	663	Poor
SD047 over White Rv	1954	661	Fair
N. Main Street over Medicine Creek	1958	570	Fair
Irr Ar SD273 over Medicine Ck	1967	464	Fair
State Hwy 47 over Big Bend Dam Powerhouse	1964	454	Fair
Bia 10 over Medicine Creek	2018	338	Good
305TH Avenue over Stoney Butte Creek	1966	280	Good
SD047 over Bull Ck	1954	258	Fair
SD047 over Waterhole Ck	2018	258	Good
SD248 over Medicine Ck	1941	251	Fair
SD248 over Ck	2018	250	Good
SD248 over Tin Pan Ck	1953	250	Fair
Irr Ar SD273 over Grouse Ck	1967	166	Fair
Irr SD1806 over Cedar Ck	1997	161	Good
Irr SD1806 over Straight Ck	1997	161	Fair
Main Ave In Vivian over Medicine Creek	2004	130	Good
I090 Wf over Big Ck	1971	85	Good
240TH Street over Medicine Creek	2005	60	Fair
241ST Street over Medicine Creek	1932	60	Fair
303RD Avenue over Cedar Creek	1998	60	Fair
305TH Avenue over Medicine Creek	1987	60	Good
308TH Avenue over Medicine Creek	2000	60	Good
Willow St.-presho over Medicine Creek	2024	60	Good
241ST Street over Medicine Creek	1930	55	Poor
2ND St. In Presho over Medicine Creek	1920	55	Fair
SD053 over White Rv	2001	54	Fair
SD053 over Williams Ck	2001	54	Fair
243RD Street over American Crow Creek	2004	50	Good
302ND Avenue over Cedar Creek	1986	47	Good
241ST Street over Trib. to Medicine Creek	1930	45	Poor
241ST Street over Medicine Creek	1979	40	Fair
299TH Avenue over Unnamed Creek	1968	25	Good
299TH Street over Medicine Creek	1968	25	Fair
310TH Avenue over Medicine Creek	2006	25	Good
Deer Valley Road over Creek	1940	25	Fair
232ND Street over Creek	2010	24	Good
232ND Street over Creek	2017	24	Good
238TH Street over Stoney Butte Creek	2002	24	Good
291ST Avenue over Creek	1930	24	Fair
293RD Avenue over Creek	2018	24	Good
312TH Avenue over Grouse Creek	2001	24	Good
312TH Avenue over Medicine Creek	1975	24	Fair
313TH Avenue over Creek	1963	24	Fair
318TH Avenue over Creek	1930	24	Poor
239TH Street over Medicine Creek	1986	20	Good
Yates Road over American Creek	2017	20	Good
River Road over Creek	1965	16	Poor
239TH Street over Medicine Creek	1986	15	Good
314TH Avenue over Grouse Creek	1999	15	Good
338TH Avenue over Creek	1932	15	Fair
338TH Avenue over Waterhole Creek	1950	15	Poor
234TH Street over Creek	2008	10	Good
239TH Street over Grouse Creek	2000	10	Good
265TH Street over Creek	2003	10	Good
268TH Street over Bull Creek	1964	10	Fair
304TH Avenue over Creek	1966	10	Poor
320TH Street over Medicine Creek	2017	10	Good
327TH Avenue over Creek	1940	10	Poor
County Rd over Ck	1945	10	Poor
County Rd over Ck	1950	10	Poor
Shades Road over Creek	1955	10	Poor

Source: FHWA National Bridge Inventory, 2025.

Lyman 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.