Bridge conditions in Lake County, Minnesota
90 inventoried bridges · 11 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Of the 90 Lake County bridges in the federal inventory, 11 carry a poor rating. That 12.2% share is roughly 2x the national average.
- 11 of the 90 bridges in Lake County, Minnesota, are rated in poor condition (12.2%) in the 2025 National Bridge Inventory, as of .
- 46 bridges (51.1%) are rated good and 33 (36.7%) fair.
- The median Lake County bridge was built in 1981.
- The busiest poor-rated bridge is Mn 61 over Manitou River (built 1956), carrying about 3,000 vehicles a day.
Good 51.1% · Fair 36.7% · Poor 12.2% of 90 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 |
|---|---|---|---|
| Mn 61 over Manitou River | 1956 | 3,000 | Poor |
| CR 102 over Knife River | 1974 | 232 | Poor |
| Csah 34 over Stony River | 1972 | 137 | Poor |
| Csah 7 over Nine Mile Creek | 1947 | 110 | Poor |
| Spr 20 over Baptism River | 1923 | 100 | Poor |
| L.isabella R. Road over L.isabella River | 1974 | 50 | Poor |
| CR 705 over Harriet Creek | 1967 | 36 | Poor |
| Csah 8 over Caribou River | 1979 | 32 | Poor |
| Victor Lake Road over Little Isabella River | 1975 | 5 | Poor |
| Tomahawk Road over Island River | 1954 | 4 | Poor |
| T 14 over Encampment River | 1974 | 4 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mn 61 over Stewart River | 1922 | 6,474 | Good |
| Mn 61 over Silver Creek; Pedestrian | 2022 | 6,474 | Good |
| Mn 61 over Crow Creek | 1968 | 4,763 | Fair |
| Mn 61 over Encampment River | 1941 | 4,763 | Good |
| Mn 61 over Conveyer | 1952 | 4,217 | Fair |
| Mn 61 over Conveyor Tunnel | 1978 | 4,217 | Fair |
| Mn 61 over Beaver River | 1958 | 4,217 | Fair |
| Mn 61 over Palisade Creek | 2005 | 3,889 | Good |
| Mn 61 over Gooseberry River | 1996 | 3,875 | Fair |
| Mn 61 over Stream; Park Rd | 2010 | 3,875 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Minnesota: Minnesota 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.