Sth 13 over Whittlesey Creek
Bayfield County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 13 over Whittlesey Creek in Bayfield County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1954 and reconstructed in 1998, making it 71 years old at the 2025 inventory.
- It carries about 7,500 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 48 of the 103 inventoried bridges in Bayfield County rated fair (46.6%); 6 (5.8%) 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: substructure 5 to 6.
- Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (46.59488, -90.95499)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 41 ft |
| Location | 0.5M N Jct Ush 2 to W |
| NBI structure number | B04007700000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 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 Bayfield County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 2-sth 13 over Fish Creek | 1991 | 11,600 | Fair |
| Ush 2-sth 13 over Fish Creek | 1991 | 11,600 | Fair |
| Sth 13 over Little Whittlesey Crk | 1981 | 7,100 | Fair |
| Sth 13 over Terwilliger Creek | 2019 | 7,100 | Good |
| Sth 13 over Boyd Creek | 2020 | 7,100 | Good |
| Sth 13 over Thompson Creek | 1980 | 6,400 | Fair |
All bridges nearby: Bayfield County, WI bridge conditions · every bridge in Bayfield County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.