US Bridges

Lrd Alderson ST over Sth 29

Fair

Marathon County, Wisconsin · 1.0M S JCT Cth Jj · Structure no. B37008200000000

Built
1989
36 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
230 ft
2 main spans
Daily traffic
3,500
2023 count
Owner
State
State Highway Agency

About this bridge

Lrd Alderson ST over Sth 29 is a prestressed concrete continuous stringer/multi-beam or girder carrying Lrd Alderson ST over Sth 29 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 3,500 vehicles a day, projected to reach 3,500 by 2043. The structure is 230 ft (70 m) long and 59 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLrd Alderson ST
CrossesSth 29
Location1.0M S JCT Cth Jj
RouteCity Street 0
CountyMarathon County
StateWisconsin
Coordinates44.89395, -89.59274
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length230 ft (70 m)
Longest span118 ft (36 m)
Deck width59 ft (18.1 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2023)
Projected traffic3,500 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 Lrd Alderson ST over Sth 29 built?

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

What condition is Lrd Alderson ST over Sth 29 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 October 2024.

How much traffic does Lrd Alderson ST over Sth 29 carry?

About 3,500 vehicles per day (2023 count).

How long is Lrd Alderson ST over Sth 29?

The structure is 230 ft (70 m) long with a longest span of 118 ft (36 m) and a deck 59 ft wide.

Who owns Lrd Alderson ST over Sth 29?

It is owned by the State Highway Agency.