Lrd 770TH Ave over Trimbelle River
Pierce County, Wisconsin · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lrd 770TH Ave over Trimbelle River in Pierce County, Wisconsin, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1979, making it 46 years old at the 2025 inventory.
- It carries about 125 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 10 of the 250 inventoried bridges in Pierce County rated poor (4.0%); 10 (4.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: superstructure 5 to 4.
- Its most recent inspection on record is dated April 2024, on a 12-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (44.8154, -92.52053)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 29 ft |
| Location | 0.2M W Jct Cth W |
| NBI structure number | P47012900000000 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
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.