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Every bridge in Lake County, South Dakota

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

79 inventoried bridges, busiest first

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

Lake County, South Dakota, has 79 bridges in the 2025 National Bridge Inventory: 35 rated good, 40 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
SD034 over Silver Ck	2000	8,695	Fair
414 NE Second Str over Madison Ck	1959	7,576	Fair
SD034 E over Park Ck	1977	3,631	Fair
SD034 W over Park Ck	1977	3,631	Fair
500 N Egan Ave over Madison Ck	1993	3,190	Fair
610 S. Egan Avenue over Silver Ck	1979	2,915	Fair
SD019 over Park Ck	2014	2,881	Good
US081 over Ck	1997	1,811	Good
US081 over Ck	1997	1,811	Good
US081 over East Fork Vermillion Rv	1983	1,811	Fair
US081 over Battle Ck	1954	1,786	Good
SD019 over North Buffalo Ck	2014	1,648	Good
SD019 over Trib to Buffalo Lake	2014	1,648	Good
SD019 over Trib to Long Lake	2014	1,648	Good
509 Center Str E over Madison Ck	2020	1,283	Good
241 St over Buffalo Ck	2019	903	Good
464 Ave over Buffalo Ck	2020	883	Good
235 St over Park Ck	1937	684	Fair
461 Ave over North Buffalo Ck	2021	681	Good
461 Ave over Ck	1950	580	Poor
233 St over Ck	1956	400	Fair
902 N Olive Ave over Ck	1979	400	Good
316 N Lee Ave over Park Ck	2000	386	Good
317 Harth Ave over Park Ck	2000	386	Good
725 4TH Str SE over Park Ck	2000	386	Good
223 St over Battle Ck	2012	350	Good
460 Ave over Battle Ck	2009	345	Good
224 9TH Str NE over Park Ck	1994	315	Good
202 NW 7TH Street over Park Ck	2003	290	Good
213 N Lincoln Ave over Park Ck	2003	290	Good
449 Ave over Ck	1930	290	Poor
508 NE First Str over Park Ck	2003	290	Good
241 St over Buffalo Ck	1998	270	Good
229 St over Battle Ck	1941	265	Fair
461 Ave over Buffalo Ck	1955	260	Fair
212 5TH St NW over Madison Ck	1972	257	Fair
463 Ave over Battle Ck	1956	238	Fair
451 Ave over Ck	1932	220	Fair
111 Grant Avenue over Park Ck	2000	200	Good
415 N Washngtn Ave over Park Ck	1996	200	Good
228 St over Battle Ck	1941	183	Fair
241 St over East Fork Vermillion Rv	2004	175	Good
456 Ave over Creek	2022	173	Good
442A Ave over East Fork Vermillion Rv	1939	165	Fair
228 St over Battle Ck	1930	143	Fair
462 Ave over Round & Brant Lk	2024	131	Good
111 Garfield Ave S over Park Ck	2020	100	Good
City Street over Silver Ck	1978	100	Fair
237 St over East Fork Vermillion Rv	1940	91	Fair
456 Ave over Battle Ck	1941	91	Fair
457 Ave over Battle Ck	1935	91	Fair
458 Ave over Battle Ck	1935	91	Fair
465 Ave over Battle Ck	1935	91	Fair
465 Ave over Ck	1935	91	Fair
224 St over Ck	1984	65	Fair
240 St over Buffalo Ck	1955	65	Fair
459 Ave over Battle Ck	2001	65	Good
461 Ave over Battle Ck	1935	65	Fair
455 Ave over North Br Buffalo Ck	1977	60	Fair
227 St over Battle Ck	1935	55	Fair
231 St over Ck	1940	55	Fair
231 St over East Fork Vermillion Rv	1930	55	Poor
224 St over Battle Ck	2003	50	Good
462 Ave over Buffalo Ck	1940	50	Fair
225 St over Battle Ck	1985	45	Fair
227 St over Battle Ck	1985	45	Fair
229 St over Battle Ck	1947	45	Fair
240 St over East Fork Vermillion Rv	1977	45	Fair
462 Ave over Battle Ck	1988	45	Good
243 St over East Fork Vermillion Rv	1997	42	Fair
448 Ave over East Fork Vermillion Rv	1997	42	Fair
450 Ave over Ck	1993	40	Good
230 St over East Fork Vermillion Rv	1938	35	Fair
233 St over Ck	1993	35	Good
244 St over East Fork Vermillion Rv	2005	35	Fair
236 St over East Fork Vermillion Rv	1987	25	Fair
443 Ave over Ck	1938	25	Good
226 St over Battle Ck	2016	15	Good
464 Ave over Battle Ck	1930	15	Poor

Source: FHWA National Bridge Inventory, 2025.

Lake 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.