Lrd Birnamwood Rd over Plover River
Marathon County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lrd Birnamwood Rd over Plover River in Marathon County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 166 vehicles a day (traffic count year 2024).
- Its listed owner is a town or township highway agency.
- It is one of 288 of the 531 inventoried bridges in Marathon County rated fair (54.2%); 40 (7.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 7 to 6, superstructure 7 to 6.
- Its most recent inspection on record is dated October 2024, 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 → (44.92829, -89.30928)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 6 | Satisfactory condition |
| Superstructure | 7 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 42 ft |
| Location | 0.8M E Jct Cth Y |
| NBI structure number | B37019200000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Marathon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih Ush 51-ih 39 NB over Ush Bus 51 & R.R. | 2012 | 39,600 | Fair |
| Ih 39 Sb/ush 51 over Ush Bus 51 | 2013 | 39,600 | Good |
| Ush 51NB over Lrd Stewart Ave | 2009 | 38,600 | Good |
| Ush 51 SB over Lrd Hwy 52 Parkway | 2007 | 38,600 | Good |
| Ih Ush 51-ih 39 SB over Wisconsin River 26 | 1968 | 37,700 | Good |
| Ush 51 NB over Lrd Sherman St | 2007 | 34,100 | Good |
All bridges nearby: Marathon County, WI bridge conditions · every bridge in Marathon County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.