Bridge conditions in Spink County, South Dakota

176 inventoried bridges · 53 rated poor · 2025 National Bridge Inventory

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

Of the 176 Spink County bridges in the federal inventory, 53 carry a poor rating. That 30.1% share is roughly 4x the national average.

53 of the 176 bridges in Spink County, South Dakota, are rated in poor condition (30.1%) in the 2025 National Bridge Inventory, as of August 20, 2026.
23 bridges (13.1%) are rated good and 100 (56.8%) fair.
The median Spink County bridge was built in 1957.
The busiest poor-rated bridge is SD037 over Ck (built 1958), carrying about 462 vehicles a day.

Good 13.1% · Fair 56.8% · Poor 30.1% of 176 bridges

Bridges rated poor

Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.

Bridge	Built	Vehicles/day	Condition
SD037 over Ck	1958	462	Poor
165TH Street over James River	1955	146	Poor
164TH Street over S Fork Snake Creek	1964	130	Poor
175TH Street over Turtle Creek	1909	126	Poor
161ST Street over Creek	1930	100	Poor
161ST Street over Creek	1930	91	Poor
382ND Avenue over Creek	1909	85	Poor
377TH Avenue over Turtle Creek	1965	78	Poor
377TH Avenue over Creek	1929	76	Poor
177TH St over Ck	1935	55	Poor
376TH Avenue over Creek	1930	55	Poor
165TH Street over South Fork Snake Creek	1925	55	Poor
171ST Street over Creek	1930	55	Poor
379TH Avenue over Turtle Creek	1920	55	Poor
179TH Street over Turtle Creek	1908	55	Poor
166TH St over Creek	1930	55	Poor
172ND Street over Turtle Creek	1915	55	Poor
163RD Street over Creek	1935	55	Poor
167TH Street over Timber Creek	1932	55	Poor
167TH Street over James River	1912	54	Poor
168TH Street over Creek	1940	50	Poor
405TH Ave over Foster Creek	1910	50	Poor
407TH Ave over Creek	1963	50	Poor
409TH Ave over Creek	1945	50	Poor
392ND Avenue over Mud Creek	1935	44	Poor
187TH Street over Turtle Creek	1912	38	Poor
388TH Avenue over James River	1904	35	Poor
174TH Street over Creek	1930	34	Poor
151ST Street over Creek	1935	34	Poor
409TH Ave over Creek	1935	34	Poor
410TH Ave over Creek	1940	33	Poor
149TH Street over Snake Creek	1913	31	Poor
185TH St over Turtle Ck	1903	31	Poor
155TH Street over Snake Creek	1930	31	Poor
164TH St over Creek	1930	31	Poor
169TH Street over Creek	1935	31	Poor
159TH Street over Creek	1950	31	Poor
184TH Street over James River	1910	31	Poor
403RD Ave over Timber Creek	1935	31	Poor
158TH Street over Creek	1935	31	Poor
186TH Street over Foster Creek	1915	31	Poor
408TH Ave over Creek	1935	31	Poor
410TH Ave over Br Foster Creek	1935	31	Poor
173RD Street over Creek	1935	31	Poor
158TH Sreet over Creek	1955	30	Poor
182ND Street over Creek	1967	29	Poor
182ND Street over Turtle Creek	1935	22	Poor
187TH St over James River	1959	21	Poor
156TH Street over Creek	1966	13	Poor
159TH Street over Creek	1930	12	Poor
164TH Street over Fordham Creek	1935	11	Poor
164TH Street over Timber Creek	1940	9	Poor
164TH Street over Timber Creek	1935	9	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
US281 over Turtle Ck	1963	2,141	Fair
US281 over Snake Ck	1978	2,141	Fair
US281 over BNSF RR	1998	1,891	Fair
US212 over Turtle Ck	2017	1,638	Fair
US212 over James Rv	1968	1,554	Fair
US212 over Timber Ck	2007	1,202	Good
SD020 over Snake Ck	1959	972	Fair
SD020 over Snake Ck	1959	972	Fair
SD020 over Snake Ck	1959	972	Fair
SD020 over Big Slough Ck	1955	972	Fair

Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.

All of South Dakota: South Dakota bridge conditions by county · every download on the data page.

Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.