US Bridges

Sth 81 over Raccoon Creek

Fair

Rock County, Wisconsin · 1.7M E JCT Cth K · Structure no. B53014900000000

Built
1990
35 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete Continuous
Length
60 ft
2 main spans
Daily traffic
3,300
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 81 over Raccoon Creek is a concrete continuous slab carrying Sth 81 over Raccoon Creek in Rock County, Wisconsin. It was built in 1990, so it is 35 years old, younger 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 4,080 by 2042. The structure is 60 ft (18.2 m) long and 46 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesSth 81
CrossesRaccoon Creek
Location1.7M E JCT Cth K
RouteState Highway 81
CountyRock County
StateWisconsin
Coordinates42.52653, -89.19566
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length60 ft (18.2 m)
Longest span29 ft (8.8 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2022)
Projected traffic4,080 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Sth 81 over Raccoon Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is Sth 81 over Raccoon 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 June 2023.

How much traffic does Sth 81 over Raccoon Creek carry?

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

How long is Sth 81 over Raccoon Creek?

The structure is 60 ft (18.2 m) long with a longest span of 29 ft (8.8 m) and a deck 46 ft wide.

Who owns Sth 81 over Raccoon Creek?

It is owned by the State Highway Agency.