US Bridges

Ush 12-STH 27 over Coon Creek

Fair

Jackson County, Wisconsin · 7.5M E JCT Cth M to E · Structure no. B27084600000000

Built
1945
80 years old, rebuilt 1959
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
2,300
2022 count
Owner
State
State Highway Agency

About this bridge

Ush 12-STH 27 over Coon Creek is a steel stringer/multi-beam or girder carrying Ush 12-STH 27 over Coon Creek in Jackson County, Wisconsin. It was built in 1945 and reconstructed in 1959, so it is 80 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 2,300 vehicles a day, roughly 11% of them trucks, projected to reach 2,760 by 2042. The structure is 31 ft (9.6 m) long and 45 ft wide. If it were closed, the detour would be 56.5 mi (91 km).

Location

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CarriesUsh 12-STH 27
CrossesCoon Creek
Location7.5M E JCT Cth M to E
RouteU.S. Route 12
CountyJackson County
StateWisconsin
Coordinates44.59572, -90.96572
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.6 m)
Longest span31 ft (9.6 m)
Deck width45 ft (13.6 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2022)
Projected traffic2,760 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed56.5 mi (91 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 Ush 12-STH 27 over Coon Creek built?

It was built in 1945, making it 80 years old in 2025. It was reconstructed in 1959.

What condition is Ush 12-STH 27 over Coon 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 September 2023.

How much traffic does Ush 12-STH 27 over Coon Creek carry?

About 2,300 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is Ush 12-STH 27 over Coon Creek?

The structure is 31 ft (9.6 m) long with a longest span of 31 ft (9.6 m) and a deck 45 ft wide.

Who owns Ush 12-STH 27 over Coon Creek?

It is owned by the State Highway Agency.