Bridge conditions in Winnebago County, Wisconsin
265 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Winnebago County tracks close to typical: 8 of its 265 inventoried bridges (3.0%) are rated poor, against a national rate of about 7%.
- 8 of the 265 bridges in Winnebago County, Wisconsin, are rated in poor condition (3.0%) in the 2025 National Bridge Inventory, as of .
- 163 bridges (61.5%) are rated good and 94 (35.5%) fair.
- The median Winnebago County bridge was built in 2000.
- The busiest poor-rated bridge is Cth-ff over Eight Mile Creek (built 1954), carrying about 730 vehicles a day.
Good 61.5% · Fair 35.5% · Poor 3.0% of 265 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-ff over Eight Mile Creek | 1954 | 730 | Poor |
| Lrd W 35TH Ave over Merrits Creek | 1980 | 153 | Poor |
| Lrd Onpratt Trail over Lake Winnebago | 1921 | 115 | Poor |
| Lrd 9TH St Rd over Spring Brook | 1932 | 82 | Poor |
| Lrd Quigley Rd over Lake Poygan Trib | 1920 | 40 | Poor |
| Lrd Woodenshoe Rd over Neenah Slough | 1925 | 38 | Poor |
| Lrd Apache Ave over Adler Creek | 1927 | 35 | Poor |
| Lrd Access Rd over Menasha Channel | 1960 | 20 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 41 over S Br Mud Creek | 1935 | 88,300 | Fair |
| Ih 41 over Neenah Slough | 1975 | 65,700 | Fair |
| Ih 41 over Trib Lake Butte Des Mort | 2011 | 59,900 | Good |
| Ush 10 Wb/sth 441 over Cth Ap (midway Rd) | 2018 | 52,300 | Good |
| Ih 41 SB over Menasha Creek | 1992 | 52,000 | Fair |
| Ih 41 NB over Menasha Creek | 1992 | 52,000 | Fair |
| Ih 41 SB over Cth II | 1994 | 46,550 | Good |
| Ih 41 NB over Cth II | 1994 | 46,550 | Fair |
| Ih 41 SB over Lrd Green Bay Road | 1994 | 46,550 | Fair |
| Ih 41 NB over Lrd Green Bay Road | 1994 | 46,550 | 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.