Cth P over Big Slough Creek
Trempealeau County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth P over Big Slough Creek in Trempealeau County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2019, making it 6 years old at the 2025 inventory.
- It carries about 325 vehicles a day (traffic count year 2022).
- Its listed owner is the county highway agency.
- It is one of 116 of the 259 inventoried bridges in Trempealeau County rated good (44.8%); 33 (12.7%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: substructure 8 to 9.
- Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (44.41469, -91.17217)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 9 | Excellent condition |
Bridge details
| Structure | Concrete slab |
| Length | about 38 ft |
| Location | 1.9M E Jct Sth 121 |
| NBI structure number | B61023400000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Trempealeau County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 94 EB over Cth Nn / Buffalo River S | 2020 | 13,950 | Good |
| Ih 94 WB over Cth Nn / Buffalo River S | 2019 | 13,950 | Good |
| Ih 94 EB over Buffalo River | 2020 | 13,950 | Good |
| Ih 94 WB over Buffalo River | 2019 | 13,950 | Good |
| Ush 10 E and W over Ih 94 | 2003 | 8,600 | Fair |
| Sth 54-sth 93 over Little Tamarack Creek | 1951 | 7,900 | Good |
All bridges nearby: Trempealeau County, WI bridge conditions · every bridge in Trempealeau County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.