Cth O over Fox River
Marquette County, Wisconsin · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth O over Fox River in Marquette County, Wisconsin, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1961, making it 64 years old at the 2025 inventory.
- It carries about 923 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 5 of the 81 inventoried bridges in Marquette County rated poor (6.2%); 5 (6.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: deck 5 to 6, superstructure 5 to 6.
- Its most recent inspection on record is dated August 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (43.67171, -89.39591)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 6 | Satisfactory condition |
| Superstructure | 5 | 6 | Satisfactory condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Timber slab |
| Length | about 100 ft |
| Location | 0.1M W Jct Cth F |
| NBI structure number | P39005000000000 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 12 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 Marquette County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih Ush 51-ih 39 over Chapman Creek | 1985 | 17,800 | Fair |
| Ih Ush51-ih39 NB over Cth O | 1983 | 15,800 | Fair |
| Ih Ush51-ih39 SB over Cth O | 1983 | 15,800 | Fair |
| Ih Ush 51 - Ih 39 over Sth 23/82 EB & WB | 2016 | 14,700 | Good |
| Ih Ush51-ih39 NB over Lrd Dover Court | 1987 | 13,000 | Good |
| Ih Ush51-ih39 SB over Lrd Fawn Ave | 1966 | 12,800 | Fair |
All bridges nearby: Marquette County, WI bridge conditions · every bridge in Marquette County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.