Sth 29 over Unnamed Tributary
Pierce County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 29 over Unnamed Tributary in Pierce County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2021, making it 4 years old at the 2025 inventory.
- It carries about 5,800 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 147 of the 250 inventoried bridges in Pierce County rated good (58.8%); 10 (4.0%) 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 April 2024, on a 48-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 → (44.83278, -92.62778)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 24 ft |
| Location | 0.25MI Ncth Ff |
| NBI structure number | B47023000000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 48 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 Pierce County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Lrd Main St over S Fk Kinnickinnic River | 1982 | 21,115 | Fair |
| Ush 10 over St Croix River 01 | 1990 | 16,800 | Fair |
| Sth 35 over Cth M | 1993 | 12,000 | Good |
| Ush 63 over Mississippi River 10 | 2019 | 11,000 | Fair |
| Sth 35 over Lrd Golf View Rd | 1993 | 10,200 | Good |
| Sth 65 over S Fk Kinnickinnic River | 1993 | 9,400 | Fair |
All bridges nearby: Pierce County, WI bridge conditions · every bridge in Pierce County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.