US Bridges

Lrd 770th Ave over Trimbelle River

Poor

Pierce County, Wisconsin · 0.2M W JCT Cth W · Structure no. P47012900000000

Built
1979
46 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
125
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lrd 770th Ave over Trimbelle River is a steel stringer/multi-beam or girder carrying Lrd 770th Ave over Trimbelle River in Pierce County, Wisconsin. It was built in 1979, so it is 46 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 125 vehicles a day, projected to reach 102 by 2043. The structure is 30 ft (9.1 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesLrd 770th Ave
CrossesTrimbelle River
Location0.2M W JCT Cth W
RouteCity Street 0
CountyPierce County
StateWisconsin
Coordinates44.8154, -92.52053
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.6 US tons
Inventory rating23.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width26 ft (8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2024)
Projected traffic102 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$157,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd 770th Ave over Trimbelle River built?

It was built in 1979, making it 46 years old in 2025.

What condition is Lrd 770th Ave over Trimbelle River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Lrd 770th Ave over Trimbelle River carry?

About 125 vehicles per day (2024 count).

How long is Lrd 770th Ave over Trimbelle River?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns Lrd 770th Ave over Trimbelle River?

It is owned by the Town or Township Highway Agency.