US Bridges

Sth 120 over W Br Nippersink Creek

Fair

Walworth County, Wisconsin · 1.0M N JCT Cth B · Structure no. B64000700000000

Built
1954
71 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
4,500
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 120 over W Br Nippersink Creek is a concrete slab carrying Sth 120 over W Br Nippersink Creek in Walworth County, Wisconsin. It was built in 1954, so it is 71 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 4,500 vehicles a day, roughly 7% of them trucks, projected to reach 4,330 by 2042. The structure is 24 ft (7.2 m) long and 39 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesSth 120
CrossesW Br Nippersink Creek
Location1.0M N JCT Cth B
RouteState Highway 120
CountyWalworth County
StateWisconsin
Coordinates42.53129, -88.44281
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length24 ft (7.2 m)
Longest span24 ft (7.2 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2022)
Projected traffic4,330 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 120 over W Br Nippersink Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is Sth 120 over W Br Nippersink Creek 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 May 2023.

How much traffic does Sth 120 over W Br Nippersink Creek carry?

About 4,500 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Sth 120 over W Br Nippersink Creek?

The structure is 24 ft (7.2 m) long with a longest span of 24 ft (7.2 m) and a deck 39 ft wide.

Who owns Sth 120 over W Br Nippersink Creek?

It is owned by the State Highway Agency.