Sth 55 over Pine River
Forest County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 55 over Pine River in Forest 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 1979, making it 46 years old at the 2025 inventory.
- It carries about 180 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 24 of the 53 inventoried bridges in Forest County rated fair (45.3%); 6 (11.3%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2023, 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 → (45.90873, -88.8215)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 70 ft |
| Location | 19.2M N Jct Sth 32 to N |
| NBI structure number | B21000800000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2023 |
| 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 Forest County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ush 8 over Wolf River | 1960 | 3,400 | Fair |
| Sth 32 over Torpee Creek | 2011 | 3,000 | Good |
| Sth 32 over N Br Oconto River | 1970 | 2,400 | Fair |
| Sth Irr (sth 55) over Swamp Creek | 1977 | 2,100 | Good |
| Ush 8 over Peshtigo River | 1984 | 2,100 | Good |
| Ush 8 over Rat River | 1987 | 2,000 | Good |
All bridges nearby: Forest County, WI bridge conditions · every bridge in Forest County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.