US Bridges

Sth 29 EB over Porky Creek

Fair

Marathon County, Wisconsin · 1.9M E JCT Sth 13 · Structure no. B37028400000000

Built
1998
27 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete
Length
42 ft
1 main span
Daily traffic
6,400
2023 count
Owner
State
State Highway Agency

About this bridge

Sth 29 EB over Porky Creek is a concrete slab carrying Sth 29 EB over Porky Creek in Marathon County, Wisconsin. It was built in 1998, so it is 27 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 6,400 vehicles a day, roughly 8% of them trucks, projected to reach 15,240 by 2043. The structure is 42 ft (12.9 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSth 29 EB
CrossesPorky Creek
Location1.9M E JCT Sth 13
RouteState Highway 29
Coordinates44.94561, -90.27691
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.9 m)
Longest span39 ft (12 m)
Deck width42 ft (12.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,400 (2023)
Projected traffic15,240 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 29 EB over Porky Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is Sth 29 EB over Porky Creek 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 September 2024.

How much traffic does Sth 29 EB over Porky Creek carry?

About 6,400 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Sth 29 EB over Porky Creek?

The structure is 42 ft (12.9 m) long with a longest span of 39 ft (12 m) and a deck 42 ft wide.

Who owns Sth 29 EB over Porky Creek?

It is owned by the State Highway Agency.