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
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 .
- 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.
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.