US Bridges

IH 43 SB over Lrd Martin RD

Fair

Waukesha County, Wisconsin · 5.3 MI S JCT IH 41 · Structure no. B67011100000000

Built
1969
56 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
153 ft
3 main spans
Daily traffic
27,600
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Lrd Martin RD is a prestressed concrete stringer/multi-beam or girder carrying IH 43 SB over Lrd Martin RD in Waukesha County, Wisconsin. It was built in 1969, so it is 56 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 27,600 vehicles a day, roughly 13% of them trucks, projected to reach 30,750 by 2042. The structure is 153 ft (46.5 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIH 43 SB
CrossesLrd Martin RD
Location5.3 MI S JCT IH 41
RouteInterstate 43
Coordinates42.93758, -88.14665
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating30.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length153 ft (46.5 m)
Longest span74 ft (22.7 m)
Deck width59 ft (18 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,600 (2022)
Projected traffic30,750 by 2042
Trucks13%
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 Martin RD built?

It was built in 1969, making it 56 years old in 2025.

What condition is IH 43 SB over Lrd Martin 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 October 2024.

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

About 27,600 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is IH 43 SB over Lrd Martin RD?

The structure is 153 ft (46.5 m) long with a longest span of 74 ft (22.7 m) and a deck 59 ft wide.

Who owns IH 43 SB over Lrd Martin RD?

It is owned by the State Highway Agency.