Bridge conditions in Manitowoc County, Wisconsin
277 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
13 of the 277 bridges the federal inventory lists in Manitowoc County are rated poor; the rest split 122 good and 142 fair.
- 13 of the 277 bridges in Manitowoc County, Wisconsin, are rated in poor condition (4.7%) in the 2025 National Bridge Inventory, as of .
- 122 bridges (44.0%) are rated good and 142 (51.3%) fair.
- The median Manitowoc County bridge was built in 1979.
- The busiest poor-rated bridge is Sth 42 over Manitowoc River (built 1987), carrying about 10,900 vehicles a day.
Good 44.0% · Fair 51.3% · Poor 4.7% of 277 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 |
|---|---|---|---|
| Sth 42 over Manitowoc River | 1987 | 10,900 | Poor |
| Sth 32-sth 57 over Sheboygan River | 1958 | 3,200 | Poor |
| Cth Q over Little Manitowoc River | 1958 | 3,000 | Poor |
| Cth Q over Br W Twin River | 1964 | 2,250 | Poor |
| Cth Cs over Silver Creek | 1969 | 1,800 | Poor |
| Cth Q over W Twin River | 1939 | 1,300 | Poor |
| Cth Xx Washington over Br Centerville Creek | 1917 | 795 | Poor |
| Cth K over Mud Creek | 1970 | 780 | Poor |
| Lrd Taus Road over Mud Creek | 1962 | 675 | Poor |
| Lrd Grimms Rd over Trib to Branch River | 1985 | 90 | Poor |
| Lrd Old Hwy Q over Br W Twin River | 1924 | 88 | Poor |
| Lrd Marquette Rd over Mud Creek | 1930 | 75 | Poor |
| Lrd Old Wooden Bri over Cn RR | 1900 | 52 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 43 over Fischer Creek | 1976 | 24,400 | Fair |
| Ih 43 over Calvin Creek | 1978 | 23,200 | Fair |
| Ih 43 over Silver Creek | 1978 | 23,200 | Fair |
| Ih 43 over Pine Creek | 1978 | 22,500 | Fair |
| Sth 42 over Manitowoc River | 1987 | 20,634 | Good |
| Sth 42 over Manitowoc River | 1987 | 20,634 | Good |
| Ih 43 over Francis Creek | 1976 | 20,000 | Fair |
| Lrd 18TH St over Lrd Spring St Connector | 1978 | 14,600 | Fair |
| Lrd Revere Dr (SB) over Manitowoc River | 1984 | 14,600 | Fair |
| Lrd North 21ST Str over Manitowoc River | 1990 | 14,600 | 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.