US Bridges

Cth M over IH Ush 51-IH 39

Good

Marquette County, Wisconsin · 1.9M E JCT Cth J · Structure no. B39002800000000

Built
1987
38 years old, rebuilt 2016
Condition
Good
inspected April 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
255 ft
2 main spans
Daily traffic
1,900
2022 count
Owner
State
State Highway Agency

About this bridge

Cth M over IH Ush 51-IH 39 is a steel continuous stringer/multi-beam or girder carrying Cth M over IH Ush 51-IH 39 in Marquette County, Wisconsin. It was built in 1987 and reconstructed in 2016, so it is 38 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 1,900 vehicles a day, projected to reach 1,900 by 2041. The structure is 255 ft (77.8 m) long and 37 ft wide. If it were closed, the detour would be 13.7 mi (22 km).

Location

Open in Google Maps
CarriesCth M
CrossesIH Ush 51-IH 39
Location1.9M E JCT Cth J
RouteCounty Highway 0M
CountyMarquette County
StateWisconsin
Coordinates43.85022, -89.48296
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length255 ft (77.8 m)
Longest span125 ft (38.1 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2022)
Projected traffic1,900 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed13.7 mi (22 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cth M over IH Ush 51-IH 39 built?

It was built in 1987, making it 38 years old in 2025. It was reconstructed in 2016.

What condition is Cth M over IH Ush 51-IH 39 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 April 2022.

How much traffic does Cth M over IH Ush 51-IH 39 carry?

About 1,900 vehicles per day (2022 count).

How long is Cth M over IH Ush 51-IH 39?

The structure is 255 ft (77.8 m) long with a longest span of 125 ft (38.1 m) and a deck 37 ft wide.

Who owns Cth M over IH Ush 51-IH 39?

It is owned by the State Highway Agency.