Cth O over Armstrong Creek
Lincoln County, Wisconsin · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth O over Armstrong Creek in Lincoln County, Wisconsin, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1937, making it 88 years old at the 2025 inventory.
- It carries about 424 vehicles a day (traffic count year 2023).
- Its listed owner is the county highway agency.
- It is one of 78 of the 158 inventoried bridges in Lincoln County rated fair (49.4%); 9 (5.7%) 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 June 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 → (45.44004, -89.84982)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Timber slab |
| Length | about 22 ft |
| Location | 2.4M S Jct Sth 86 |
| NBI structure number | P35091200000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Lincoln County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sth 4TH Street over Wisconsin River 42 | 2011 | 15,223 | Good |
| Ush 51 NB over Cth H | 1996 | 13,900 | Good |
| Ush 51 SB over Cth H | 1996 | 13,900 | Good |
| Ush 51 SB over Little Pine Creek | 1999 | 12,600 | Good |
| Ush 51 NB over Wisconsin River 35 | 1974 | 8,700 | Fair |
| Ush 51 NB over Canadian National RR | 1974 | 8,450 | Good |
All bridges nearby: Lincoln County, WI bridge conditions · every bridge in Lincoln County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.