US Bridges

Cth N over Grant River

Good

Grant County, Wisconsin · 1.4M N JCT Sth 133 · Structure no. B22017700000000

Built
1999
26 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
170 ft
3 main spans
Daily traffic
352
2022 count
Owner
County
County Highway Agency

About this bridge

Cth N over Grant River is a concrete continuous slab carrying Cth N over Grant River in Grant County, Wisconsin. It was built in 1999, so it is 26 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 352 vehicles a day, projected to reach 387 by 2043. The structure is 170 ft (51.8 m) long and 28 ft wide. If it were closed, the detour would be 15.5 mi (25 km).

CarriesCth N
CrossesGrant River
Location1.4M N JCT Sth 133
RouteCounty Highway 0N
Coordinates42.72008, -90.81919
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length170 ft (51.8 m)
Longest span69 ft (21 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic352 (2022)
Projected traffic387 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed15.5 mi (25 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Cth N over Grant River built?

It was built in 1999, making it 26 years old in 2025.

What condition is Cth N over Grant River 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 October 2024.

How much traffic does Cth N over Grant River carry?

About 352 vehicles per day (2022 count).

How long is Cth N over Grant River?

The structure is 170 ft (51.8 m) long with a longest span of 69 ft (21 m) and a deck 28 ft wide.

Who owns Cth N over Grant River?

It is owned by the County Highway Agency.