Ush 51 over Spider Lake
Vilas County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ush 51 over Spider Lake in Vilas County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1998, making it 27 years old at the 2025 inventory.
- It carries about 4,300 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 13 of the 29 inventoried bridges in Vilas County rated good (44.8%); 3 (10.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (deck 6 to 7).
- Its most recent inspection on record is dated June 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 → (46.11446, -89.83147)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 83 ft |
| Location | 5.0M N Jct Cth H |
| NBI structure number | B63001800000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 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 Vilas County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 45-sth 17-sth over Eagle River | 2000 | 14,000 | Fair |
| Sth 17-sth 70 over Mud Creek | 1981 | 9,600 | Fair |
| Sth 70 over Wisconsin River 53 | 1993 | 6,000 | Fair |
| Sth 70 over Link Creek | 1988 | 5,700 | Fair |
| Sth 47 over Mishonagon Creek | 2008 | 4,800 | Good |
| Sth 70 over Saint Germain River | 1968 | 4,300 | Fair |
All bridges nearby: Vilas County, WI bridge conditions · every bridge in Vilas County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.