US Bridges

Lrd Rock RD over Rock Creek

Fair

Marathon County, Wisconsin · 0.5M E JCT Sth 97 · Structure no. P37031000000000

Built
1946
79 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
1 main span
Daily traffic
52
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lrd Rock RD over Rock Creek is a steel stringer/multi-beam or girder carrying Lrd Rock RD over Rock Creek in Marathon County, Wisconsin. It was built in 1946, so it is 79 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 52 vehicles a day, projected to reach 44 by 2043. The structure is 46 ft (14.1 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesLrd Rock RD
CrossesRock Creek
Location0.5M E JCT Sth 97
RouteCity Street 0
CountyMarathon County
StateWisconsin
Coordinates44.82972, -90.06933
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length46 ft (14.1 m)
Longest span41 ft (12.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52 (2024)
Projected traffic44 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd Rock RD over Rock Creek built?

It was built in 1946, making it 79 years old in 2025.

What condition is Lrd Rock RD over Rock 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 August 2024.

How much traffic does Lrd Rock RD over Rock Creek carry?

About 52 vehicles per day (2024 count).

How long is Lrd Rock RD over Rock Creek?

The structure is 46 ft (14.1 m) long with a longest span of 41 ft (12.4 m) and a deck 24 ft wide.

Who owns Lrd Rock RD over Rock Creek?

It is owned by the Town or Township Highway Agency.