US Bridges

Sth 107 over Big Rib River

Fair

Marathon County, Wisconsin · 0.5M N JCT Cth B · Structure no. B37023900000000

Built
1989
36 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
206 ft
2 main spans
Daily traffic
5,500
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 107 over Big Rib River is a steel continuous stringer/multi-beam or girder carrying Sth 107 over Big Rib River in Marathon County, Wisconsin. It was built in 1989, so it is 36 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5,500 vehicles a day, roughly 4% of them trucks, projected to reach 8,970 by 2042. The structure is 206 ft (62.8 m) long and 57 ft wide. If it were closed, the detour would be 43.5 mi (70 km).

Location

Open in Google Maps
CarriesSth 107
CrossesBig Rib River
Location0.5M N JCT Cth B
RouteState Highway 107
CountyMarathon County
StateWisconsin
Coordinates44.93488, -89.84006
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 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 length206 ft (62.8 m)
Longest span100 ft (30.5 m)
Deck width57 ft (17.4 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2022)
Projected traffic8,970 by 2042
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed43.5 mi (70 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 107 over Big Rib River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Sth 107 over Big Rib River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does Sth 107 over Big Rib River carry?

About 5,500 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Sth 107 over Big Rib River?

The structure is 206 ft (62.8 m) long with a longest span of 100 ft (30.5 m) and a deck 57 ft wide.

Who owns Sth 107 over Big Rib River?

It is owned by the State Highway Agency.