Cth O over Sth 29
Marathon County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Cth O over Sth 29 in Marathon 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 2013, making it 12 years old at the 2025 inventory.
- It carries about 1,000 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 203 of the 531 inventoried bridges in Marathon County rated good (38.2%); 40 (7.5%) 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 2022, 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 → (44.94398, -89.78493)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 160 ft |
| Location | 3.33 Mi E Jct Sth 107 |
| NBI structure number | B37040800000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Wisconsin department of transportation.
Busiest bridges in Marathon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ih Ush 51-ih 39 NB over Ush Bus 51 & R.R. | 2012 | 39,600 | Fair |
| Ih 39 Sb/ush 51 over Ush Bus 51 | 2013 | 39,600 | Good |
| Ush 51NB over Lrd Stewart Ave | 2009 | 38,600 | Good |
| Ush 51 SB over Lrd Hwy 52 Parkway | 2007 | 38,600 | Good |
| Ih Ush 51-ih 39 SB over Wisconsin River 26 | 1968 | 37,700 | Good |
| Ush 51 NB over Lrd Sherman St | 2007 | 34,100 | Good |
All bridges nearby: Marathon County, WI bridge conditions · every bridge in Marathon County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.