US Bridges

IH 43 SB over Lrd Summerville RD

Fair

Rock County, Wisconsin · 4.6M S JCT Ush 14 to W · Structure no. B53011900000000

Built
1975
50 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
141 ft
3 main spans
Daily traffic
9,400
2022 count
Owner
State
State Highway Agency

About this bridge

IH 43 SB over Lrd Summerville RD is a prestressed concrete continuous stringer/multi-beam or girder carrying IH 43 SB over Lrd Summerville RD in Rock 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 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 9,400 vehicles a day, roughly 10% of them trucks, projected to reach 11,280 by 2039. The structure is 141 ft (43 m) long and 44 ft wide.

CarriesIH 43 SB
CrossesLrd Summerville RD
Location4.6M S JCT Ush 14 to W
RouteInterstate 43
Coordinates42.5774, -88.79565
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 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 rating57.7 US tons
Inventory rating42.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length141 ft (43 m)
Longest span59 ft (18.1 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,400 (2022)
Projected traffic11,280 by 2039
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Summerville RD built?

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

What condition is IH 43 SB over Lrd Summerville 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 2023.

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

About 9,400 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IH 43 SB over Lrd Summerville RD?

The structure is 141 ft (43 m) long with a longest span of 59 ft (18.1 m) and a deck 44 ft wide.

Who owns IH 43 SB over Lrd Summerville RD?

It is owned by the State Highway Agency.