Ih 43 SB over Cth F
Manitowoc County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ih 43 SB over Cth F in Manitowoc County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 11,250 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 142 of the 277 inventoried bridges in Manitowoc County rated fair (51.3%); 13 (4.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (43.97944, -87.7337)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 118 ft |
| Location | 6.8M S Jct Ush 151 |
| NBI structure number | B36004000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Manitowoc 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 |
All bridges nearby: Manitowoc County, WI bridge conditions · every bridge in Manitowoc County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.