US Bridges

Sth 29 EB over Lrd Porter Road

Good

Shawano County, Wisconsin · 3.8M E JCT Cth T · Structure no. B58008300000000

Built
1997
28 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
7,600
2024 count
Owner
State
State Highway Agency

About this bridge

Sth 29 EB over Lrd Porter Road is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 29 EB over Lrd Porter Road in Shawano County, Wisconsin. It was built in 1997, so it is 28 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 7,600 vehicles a day, roughly 8% of them trucks, projected to reach 8,820 by 2042. The structure is 128 ft (38.9 m) long and 43 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSth 29 EB
CrossesLrd Porter Road
Location3.8M E JCT Cth T
RouteState Highway 29
Coordinates44.73498, -88.46223
Functional classRural Principal Arterial - Other

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 inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating102.6 US tons
Inventory rating59 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (38.9 m)
Longest span54 ft (16.6 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2024)
Projected traffic8,820 by 2042
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Sth 29 EB over Lrd Porter Road built?

It was built in 1997, making it 28 years old in 2025.

What condition is Sth 29 EB over Lrd Porter Road 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 August 2024.

How much traffic does Sth 29 EB over Lrd Porter Road carry?

About 7,600 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Sth 29 EB over Lrd Porter Road?

The structure is 128 ft (38.9 m) long with a longest span of 54 ft (16.6 m) and a deck 43 ft wide.

Who owns Sth 29 EB over Lrd Porter Road?

It is owned by the State Highway Agency.