US Bridges

Cth O over IH 43

Fair

Walworth County, Wisconsin · 1.4 M S JCT Sth 11 · Structure no. B64012100000000

Built
1976
49 years old, rebuilt 2009
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
245 ft
2 main spans
Daily traffic
3,500
2022 count
Owner
State
State Highway Agency

About this bridge

Cth O over IH 43 is a steel continuous stringer/multi-beam or girder carrying Cth O over IH 43 in Walworth County, Wisconsin. It was built in 1976 and reconstructed in 2009, so it is 49 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 3,500 vehicles a day, projected to reach 3,600 by 2042. The structure is 245 ft (74.6 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCth O
CrossesIH 43
Location1.4 M S JCT Sth 11
RouteCounty Highway 0O
CountyWalworth County
StateWisconsin
Coordinates42.61203, -88.64924
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 rating70.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length245 ft (74.6 m)
Longest span122 ft (37.3 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,500 (2022)
Projected traffic3,600 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Cth O over IH 43 built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2009.

What condition is Cth O over IH 43 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 2023.

How much traffic does Cth O over IH 43 carry?

About 3,500 vehicles per day (2022 count).

How long is Cth O over IH 43?

The structure is 245 ft (74.6 m) long with a longest span of 122 ft (37.3 m) and a deck 48 ft wide.

Who owns Cth O over IH 43?

It is owned by the State Highway Agency.