US Bridges

IH 43 SB over Lrd Mound RD

Fair

Walworth County, Wisconsin · 3.6 MI S JCT Sth 67 · Structure no. B64011700000000

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
3 main spans
Daily traffic
10,950
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Lrd Mound RD is a steel continuous stringer/multi-beam or girder carrying IH 43 SB over Lrd Mound RD in Walworth County, Wisconsin. It was built in 1975, so it is 50 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 10,950 vehicles a day, roughly 12% of them trucks, projected to reach 13,140 by 2042. The structure is 235 ft (71.7 m) long and 44 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH 43 SB
CrossesLrd Mound RD
Location3.6 MI S JCT Sth 67
RouteInterstate 43
Coordinates42.64053, -88.60556
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length235 ft (71.7 m)
Longest span128 ft (38.9 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,950 (2022)
Projected traffic13,140 by 2042
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 IH 43 SB over Lrd Mound RD built?

It was built in 1975, making it 50 years old in 2025.

What condition is IH 43 SB over Lrd Mound RD 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 2023.

How much traffic does IH 43 SB over Lrd Mound RD carry?

About 10,950 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is IH 43 SB over Lrd Mound RD?

The structure is 235 ft (71.7 m) long with a longest span of 128 ft (38.9 m) and a deck 44 ft wide.

Who owns IH 43 SB over Lrd Mound RD?

It is owned by the State Highway Agency.