Sth 78 over Brennan CR
Lafayette County, Wisconsin · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sth 78 over Brennan CR in Lafayette County, Wisconsin, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2007, making it 18 years old at the 2025 inventory.
- It carries about 1,500 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 102 of the 217 inventoried bridges in Lafayette County rated good (47.0%); 21 (9.7%) 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 July 2021, 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 → (42.73779, -89.86072)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Concrete slab |
| Length | about 47 ft |
| Location | at Brennan Creek |
| NBI structure number | B33010900000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2021 |
| Inspection interval (item 91) | 48 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 Lafayette County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Sth 23-sth 81-main over Pecatonica River | 1968 | 10,400 | Fair |
| Ush 151 over Galena R Headwaters | 2004 | 9,800 | Fair |
| Ush 151 NB over Cottage Inn Branch | 2002 | 5,250 | Fair |
| Ush 151 SB over Cottage Inn Branch | 2003 | 5,250 | Good |
| Ush 151 NB over Lrd Private Drive/pecato | 2002 | 5,250 | Good |
| Ush 151 SB over Pecatonica River | 2003 | 5,250 | Good |
All bridges nearby: Lafayette County, WI bridge conditions · every bridge in Lafayette County · Wisconsin bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.