US Bridges

Sth 59 over Sth 11-STH 81

Fair

Green County, Wisconsin · At JCT Sth 11 · Structure no. B23003700000000

Built
1978
47 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
263 ft
2 main spans
Daily traffic
3,300
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 59 over Sth 11-STH 81 is a steel continuous stringer/multi-beam or girder carrying Sth 59 over Sth 11-STH 81 in Green County, Wisconsin. It was built in 1978, so it is 47 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 3,300 vehicles a day, roughly 7% of them trucks, projected to reach 3,950 by 2039. The structure is 263 ft (80.2 m) long and 71 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSth 59
CrossesSth 11-STH 81
LocationAt JCT Sth 11
RouteState Highway 59
CountyGreen County
StateWisconsin
Coordinates42.60818, -89.61958
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length263 ft (80.2 m)
Longest span134 ft (40.7 m)
Deck width71 ft (21.6 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2022)
Projected traffic3,950 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 Sth 59 over Sth 11-STH 81 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Sth 59 over Sth 11-STH 81 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 February 2023.

How much traffic does Sth 59 over Sth 11-STH 81 carry?

About 3,300 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Sth 59 over Sth 11-STH 81?

The structure is 263 ft (80.2 m) long with a longest span of 134 ft (40.7 m) and a deck 71 ft wide.

Who owns Sth 59 over Sth 11-STH 81?

It is owned by the State Highway Agency.