Bridge conditions in Jefferson County, Wisconsin
182 inventoried bridges · 9 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Jefferson County tracks close to typical: 9 of its 182 inventoried bridges (4.9%) are rated poor, against a national rate of about 7%.
- 9 of the 182 bridges in Jefferson County, Wisconsin, are rated in poor condition (4.9%) in the 2025 National Bridge Inventory, as of .
- 101 bridges (55.5%) are rated good and 72 (39.6%) fair.
- The median Jefferson County bridge was built in 1997.
- The busiest poor-rated bridge is Cth N over Deer Creek (built 1960), carrying about 2,537 vehicles a day.
Good 55.5% · Fair 39.6% · Poor 4.9% of 182 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 |
|---|---|---|---|
| Cth N over Deer Creek | 1960 | 2,537 | Poor |
| Cth D over Bark River | 1950 | 1,500 | Poor |
| Lrd Rock River Rd over Rock River | 1985 | 185 | Poor |
| Lrd Morgans Rd over Oconomowoc River | 1951 | 176 | Poor |
| Lrd Wright Rd over Johnson Creek | 1963 | 155 | Poor |
| Lrd Rockdale Rd over Koshkonong Creek | 1930 | 88 | Poor |
| Lrd Turner Rd over Bark River | 1982 | 82 | Poor |
| Lrd Staude Rd over Duck Creek | 1920 | 58 | Poor |
| Lrd Hagedorn Rd over Duck Creek | 1940 | 58 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 94 WB over Lrd Newville Rd | 2024 | 43,300 | Good |
| Ih 94 WB over Lrd Rock Lake Rd | 2024 | 43,300 | Good |
| Ih 94 EB over Lrd Willow Glen Rd | 1963 | 24,600 | Fair |
| Ih 94 WB over Lrd Willow Glen Rd | 1963 | 24,600 | Fair |
| Ih 94 EB over Cth P | 1964 | 21,400 | Fair |
| Ih 94 WB over Cth P | 1964 | 21,400 | Good |
| Ih 94 EB over Lrd Hillside Rd | 1964 | 21,400 | Fair |
| Ih 94 WB over Lrd Hillside Rd | 2020 | 21,400 | Good |
| Ih 94 EB over Johnson Creek | 2020 | 21,400 | Good |
| Ih 94 WB over Johnson Creek | 2020 | 21,400 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Wisconsin: Wisconsin 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.