US Bridges

Sth 78 over Brennan CR

Good

Lafayette County, Wisconsin · At Brennan Creek · Structure no. B33010900000000

Built
2007
18 years old
Condition
Good
inspected July 2021
Type
Slab
Concrete
Length
48 ft
1 main span
Daily traffic
1,500
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 78 over Brennan CR is a concrete slab carrying Sth 78 over Brennan CR in Lafayette County, Wisconsin. It was built in 2007, so it is 18 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,500 vehicles a day, roughly 6% of them trucks, projected to reach 1,500 by 2040. The structure is 48 ft (14.5 m) long and 36 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesSth 78
CrossesBrennan CR
LocationAt Brennan Creek
RouteState Highway 78
CountyLafayette County
StateWisconsin
Coordinates42.73779, -89.86072
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.8 US tons
Inventory rating37.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length48 ft (14.5 m)
Longest span45 ft (13.7 m)
Deck width36 ft (11.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2022)
Projected traffic1,500 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 78 over Brennan CR built?

It was built in 2007, making it 18 years old in 2025.

What condition is Sth 78 over Brennan CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2021.

How much traffic does Sth 78 over Brennan CR carry?

About 1,500 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is Sth 78 over Brennan CR?

The structure is 48 ft (14.5 m) long with a longest span of 45 ft (13.7 m) and a deck 36 ft wide.

Who owns Sth 78 over Brennan CR?

It is owned by the State Highway Agency.