US Bridges

Cth Db over IH Ush 51-IH 39

Fair

Portage County, Wisconsin · 0.7M S Marathon CO Line · Structure no. B49005700000000

Built
1972
53 years old, rebuilt 2011
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
258 ft
2 main spans
Daily traffic
1,200
2021 count
Owner
State
State Highway Agency

About this bridge

Cth Db over IH Ush 51-IH 39 is a steel continuous stringer/multi-beam or girder carrying Cth Db over IH Ush 51-IH 39 in Portage County, Wisconsin. It was built in 1972 and reconstructed in 2011, so it is 53 years old, older 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 5 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 1,200 vehicles a day, projected to reach 1,200 by 2043. The structure is 258 ft (78.5 m) long and 47 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCth Db
CrossesIH Ush 51-IH 39
Location0.7M S Marathon CO Line
RouteCounty Highway 0DB
CountyPortage County
StateWisconsin
Coordinates44.67587, -89.6424
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length258 ft (78.5 m)
Longest span129 ft (39.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2021)
Projected traffic1,200 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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—
NavigationNot applicable (no waterway)

Frequently asked questions

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

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2011.

What condition is Cth Db over IH Ush 51-IH 39 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 August 2024.

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

About 1,200 vehicles per day (2021 count).

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

The structure is 258 ft (78.5 m) long with a longest span of 129 ft (39.2 m) and a deck 47 ft wide.

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

It is owned by the State Highway Agency.