Sth 66 over Alder CR
Wood County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 66 over Alder CR in Wood County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 2012, making it 13 years old at the 2025 inventory.
- It carries about 4,600 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 78 of the 240 inventoried bridges in Wood County rated fair (32.5%); 13 (5.4%) are rated poor.
- 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 → (44.44947, -89.75414)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 28 ft |
| Location | 3.17 Miles E. of Sth 34 |
| NBI structure number | B71018000000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Wood County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sth 13/STH 54-daly over Wisconsin River 20 | 1979 | 22,700 | Fair |
| Sth 54-baker Dr over Fox Valley & Western | 1998 | 11,400 | Good |
| Sth 13-8th St over Nepco Lake | 1988 | 11,200 | Fair |
| Sth 13S - Cth A over Ush 10 | 2011 | 10,700 | Good |
| Sth 13 SB over Lrd Peach Ave | 2003 | 10,600 | Good |
| Sth 13/34 over Lrd Durabeauty Lane | 1993 | 10,400 | Fair |
All bridges nearby: Wood County, WI bridge conditions · every bridge in Wood County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.