Home › South Dakota › Tripp County › All bridges

Every bridge in Tripp County, South Dakota

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

89 inventoried bridges, busiest first

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

Tripp County, South Dakota, has 89 bridges in the 2025 National Bridge Inventory: 29 rated good, 38 fair, and 22 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
US018 over Dog Ear Ck	1965	3,553	Fair
US018 Ser Rd over Ck	1965	2,820	Fair
US018 over Sand Ck	1973	2,052	Fair
US018 over Ck	1973	1,803	Fair
US018 over Big Hollow Ck	1965	1,746	Good
US018 over Cottonwood Ck	1965	1,746	Fair
SD044 over Sand Ck	1969	1,172	Fair
SD044 over Thunder Ck	1969	1,172	Good
US018 over Ck	1965	1,139	Fair
US018 over De Bell Ck	1988	1,139	Fair
US018 over East Cottonwood Ck	1988	1,139	Fair
US018 over West Cottonwood Ck	1988	1,139	Fair
US183 over Dry Run Ck	2001	980	Fair
US183 over Ck	1948	637	Fair
US183 over Ck	1948	637	Fair
SD044 over Ck	1971	540	Fair
SD044 over Ck	1971	540	Fair
SD044 over West Br Bull Ck	1971	540	Fair
SD049 over Ck	1972	502	Poor
SD049 over Moccasin Ck	1973	502	Fair
315 Avenue over Mud Ck	1958	375	Fair
SD044 over Cottonwood Ck	1988	372	Fair
SD049 over Black Dog Ck	1964	371	Fair
SD049 over Moccasin Ck	1964	371	Fair
US183 over Keya Paha Rv	1983	314	Good
288 Street over Ponca Ck	2012	150	Good
306 Avenue over Keyapaha Rv	2024	150	Good
SD053 over Willow Ck	1963	130	Fair
272 Street over Dog Ear Ck	1959	110	Fair
272 Street over Thunder Ck	1959	110	Fair
289 Street over Willow Ck	1958	110	Fair
277 Street over Old Lodge Ck	1950	100	Poor
296 Street over Ck	1958	95	Good
296 Street over Rahn Lk	2021	93	Good
296 Street over Ck	1958	90	Fair
272 Street over Br Thunder Ck	1959	80	Fair
303 Avenue over Keyapaha Rv	1959	71	Fair
303 Avenue over Sand Ck	1959	71	Fair
304 Avenue over West Cottonwood Ck	2001	63	Good
268 St over Cottonwood Ck	2005	61	Good
257 St over Cottonwood Ck	2006	55	Fair
277 Street over Dog Ear Ck	1930	55	Poor
278 Street over East Cottonwood Ck	2014	55	Good
279 Street over West Br Bull Ck	1955	55	Poor
287 Street over Ck	1935	55	Poor
300 Street over Sand Ck	1967	55	Poor
304 Avenue over Willow Ck	2018	55	Good
266 St Ideal Rd over Dog Ear Ck	1955	50	Poor
266 St Ideal Road over Owl Ck	1955	50	Poor
271 Street over Cottonwood Ck	1945	50	Poor
275 Street over West Branch Bull Ck	2003	50	Good
277 Street over Dog Ear Ck	1940	50	Poor
278 Street over Ck	2012	50	Good
297 Ave over Oak Ck	2006	50	Good
310 Avenue over Keyapaha Rv	2017	50	Good
314 Avenue over Dog Ear Ck	2011	50	Good
318 Avenue over Keya Paha Rv	2024	50	Good
327 Avenue over Ponca Ck	2010	50	Good
264 Street over Old Lodge Ck	2024	49	Good
280 Street over Dog Ear Ck	1947	49	Fair
318 Avenue over White Rv	1980	47	Fair
292 Street over Willow Ck	1950	46	Poor
269 Street over Old Lodge Ck	1955	40	Poor
282 Street over Big Hollow Ck	2007	40	Good
314 Avenue over Keyapaha Rv	1980	39	Good
318 Avenue over Old Lodge Ck	1958	37	Poor
300 Street over Lost Ck	2002	36	Good
266 Street over Thunder Ck	1993	35	Fair
329 Avenue over West Br Bull Ck	1950	35	Poor
273 Street over Cottonwood Ck	1932	34	Good
304 Avenue over Cottonwood Ck	2023	33	Good
268 Street over Old Lodge Ck	1960	31	Poor
280 Street over Thunder Ck	1962	31	Poor
285 Street over West Br Bull Ck	1987	31	Fair
300 Avenue over Keya Paha Rv	1982	31	Fair
300 Street over Shady Ck	1966	31	Poor
301 Street over Rock Bridge Creek	1958	31	Poor
311 Avenue over Dog Ear Ck	1963	31	Poor
318 Avenue over Old Lodge Ck	1987	31	Poor
327 Avenue over Ck	2018	31	Good
327 Avenue over Ck	1952	31	Fair
331 Avenue over Buffalo Ck	2020	31	Good
331 Avenue over Buffalo Ck	2020	31	Fair
316 Avenue over Keya Paha Tributary	2004	30	Good
300 Avenue over Sand Ck	1965	29	Poor
282 Street over Mud Ck	1965	25	Fair
324 Avenue over Mocassin Ck	1924	20	Poor
272 St over Dog Ear Ck	2005	15	Good
313 Avenue over Dog Ear Ck	2012	15	Good

Source: FHWA National Bridge Inventory, 2025.

Tripp 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.