US Bridges

Sth 20 WB over Cnw RR

Fair

Racine County, Wisconsin · 1.6 MI W JCT Sth 31 · Structure no. B51003900000000

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
134 ft
3 main spans
Daily traffic
14,950
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 20 WB over Cnw RR is a steel continuous stringer/multi-beam or girder carrying Sth 20 WB over Cnw RR in Racine County, Wisconsin. It was built in 1964, so it is 61 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 14,950 vehicles a day, roughly 3% of them trucks, projected to reach 17,940 by 2041. The structure is 134 ft (40.8 m) long and 47 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSth 20 WB
CrossesCnw RR
Location1.6 MI W JCT Sth 31
RouteState Highway 20
Coordinates42.71912, -87.87699
Functional classUrban Other Principal Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionJuly 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 rating52.2 US tons
Inventory rating30.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length134 ft (40.8 m)
Longest span50 ft (15.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,950 (2021)
Projected traffic17,940 by 2041
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 Sth 20 WB over Cnw RR built?

It was built in 1964, making it 61 years old in 2025.

What condition is Sth 20 WB over Cnw RR 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 July 2024.

How much traffic does Sth 20 WB over Cnw RR carry?

About 14,950 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Sth 20 WB over Cnw RR?

The structure is 134 ft (40.8 m) long with a longest span of 50 ft (15.2 m) and a deck 47 ft wide.

Who owns Sth 20 WB over Cnw RR?

It is owned by the State Highway Agency.