Every bridge in Sully County, South Dakota

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

31 inventoried bridges, busiest first

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

Sully County, South Dakota, has 31 bridges in the 2025 National Bridge Inventory: 14 rated good, 11 fair, and 6 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
US083 over Okobojo Ck	1998	1,490	Good
185 St over Ck	2017	760	Good
SD1804 over Cow Ck	2007	632	Good
SD1804 over Okobojo Ck	1972	632	Fair
SD1804 over Ck	1995	261	Good
291 Avenue over Okobojo Ck	1936	250	Fair
176 Street over Okobojo Ck	2023	230	Good
196 St over Cow Ck	2006	180	Good
185 Street over Medicine Ck	2021	150	Good
185 Street over Medicine Knoll Ck	1930	150	Fair
305 Avenue over Okobojo Ck	1990	80	Good
188 Street over Ck	1964	75	Poor
315 Avenue over Medicine Ck	1956	64	Poor
182 Street over Ck	1960	49	Fair
172 Street over Ck	2023	48	Good
296 Avenue over Okobojo Ck	2010	48	Good
300 Avenue over Ck	1981	48	Fair
Fas 6155 over Okobojo Ck	1936	47	Fair
305 Avenue over Ck	2009	35	Good
295TH Ave over Ck	2014	26	Good
172ND St over Okobojo Ck	1912	25	Fair
185 St over Medicine Knoll Ck	2005	25	Good
193 Street over Ck	1968	25	Fair
306 Avenue over Okobojo Ck	1968	25	Fair
308 Avenue over Okobojo Ck	1974	25	Fair
317 Avenue over Medicine Knoll Ck	1995	25	Good
320 Avenue over Ck	1961	25	Poor
301 Avenue over Okobojo Creek	1961	20	Poor
302 Avenue over Okobojo Ck	1962	20	Poor
309 Avenue over Okobojo Ck	1967	20	Fair
195 Street over Medicine Knoll Ck	1913	10	Poor