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Bridge conditions in Lincoln County, South Dakota

207 inventoried bridges · 32 rated poor · 2025 National Bridge Inventory

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

About one in 6 bridges in Lincoln County is rated in poor condition: 32 of 207 on the federal inventory, one of the higher shares in South Dakota.

32 of the 207 bridges in Lincoln County, South Dakota, are rated in poor condition (15.5%) in the 2025 National Bridge Inventory, as of August 20, 2026.
74 bridges (35.7%) are rated good and 101 (48.8%) fair.
The median Lincoln County bridge was built in 1967.
The busiest poor-rated bridge is 466TH Avenue over Saddle Creek (built 1964), carrying about 495 vehicles a day.

Good 35.7% · Fair 48.8% · Poor 15.5% of 207 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
466TH Avenue over Saddle Creek	1964	495	Poor
469TH Avenue over Tributary to Ash Creek	1935	261	Poor
472ND Avenue over Saddle Creek	1938	150	Poor
476TH Avenue over Trib. to W Brule Creek	1940	137	Poor
476TH Avenue over S Fork of Beaver Creek	1963	117	Poor
464TH Avenue over Blind Creek	1941	80	Poor
478TH Avenue over Trib. to E Brule Creek	1976	75	Poor
280TH Street over Beaver Creek	1935	74	Poor
468TH Avenue over Beaver Creek	1940	68	Poor
274TH Street over Beaver Creek	1935	67	Poor
477TH Avenue over Beaver Creek	1935	65	Poor
468TH Avenue over Snake Creek	1935	56	Poor
480TH Avenue over Pattee Creek	1935	55	Poor
295TH Street over Tributary to Blind Creek	1935	53	Poor
470TH Avenue over Snake Creek	1935	50	Poor
480TH Avenue over East Brule Creek	1950	50	Poor
480TH Avenue over East Brule Creek	1935	50	Poor
484TH Avenue over Trib. to Pattee Creek	1940	50	Poor
484TH Avenue over Trib. to Pattee Creek	1935	50	Poor
484TH Avenue over Trib. to Finnie Creek	1941	50	Poor
281ST Street over Long Creek	1935	45	Poor
471ST Avenue over Snake Creek	1935	45	Poor
471ST Avenue over Saddle Creek	1935	45	Poor
476TH Avenue over Nine Mile Creek	1971	45	Poor
483RD Avenue over Trib. to Finnie Creek	1935	45	Poor
295TH Street over Trib. to E Brule Creek	1940	41	Poor
481ST Avenue over East Brule Creek	1959	41	Poor
465TH Avenue over Blind Ck	1935	35	Poor
293RD Street over Trib. to Pattee Creek	1940	35	Poor
293RD Street over Pattee Creek	1970	35	Poor
467TH Avenue over Saddle Creek	1972	25	Poor
296TH Street over East Brule Creek	1950	20	Poor

Busiest bridges in the county

Bridge	Built	Vehicles/day	Condition
I029 over Nine Mile Ck	1958	33,530	Good
I029 S over I229 S & I029 S Off Ramp	2016	29,860	Good
I029 N over I229 S & I029 S Off Ramp	2016	29,860	Good
S Louise Ave over I229	1993	24,586	Fair
I029 S over 271 St - County Rd 106	2005	23,640	Fair
I029 N over 271 St - County Rd 106	2005	23,640	Good
Western Avenue over Creek	2004	17,900	Good
57TH Street over BNSF Railroad	2008	17,600	Good
I029 over Ck	1960	17,510	Good
I029 over Br Saddle Ck	1960	14,270	Fair

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

Every bridge in Lincoln County → - all 207, busiest first, each with its own condition record.

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.