Cth G over Baraboo River
Sauk County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth G over Baraboo River in Sauk 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 2009, making it 16 years old at the 2025 inventory.
- It carries about 480 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 138 of the 275 inventoried bridges in Sauk County rated good (50.2%); 25 (9.1%) 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 October 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 → (43.63821, -90.22071)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 128 ft |
| Location | at Baraboo River |
| NBI structure number | B56020200000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Sauk County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih 90 Eb-ih 94 EB over Ush 12 | 1960 | 23,500 | Fair |
| Ih 90 Wb-ih 94 WB over Ush 12 | 1960 | 23,500 | Fair |
| Ih 90 Eb-ih 94 EB over Sth 23 | 1961 | 23,500 | Fair |
| Ih 90 Wb-ih 94 WB over Sth 23 | 1961 | 23,500 | Good |
| Ih 90 Eb-ih 94 EB over Mirror Lake | 1961 | 23,500 | Fair |
| Ih 90 Wb-ih 94 WB over Mirror Lake | 1961 | 23,500 | Fair |
All bridges nearby: Sauk County, WI bridge conditions · every bridge in Sauk County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.