US Bridges

Sth 11 over Bass Creek

Fair

Rock County, Wisconsin · 3.5M E JCT Sth 213 · Structure no. B53002600000000

Built
1958
67 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
83 ft
2 main spans
Daily traffic
4,400
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 11 over Bass Creek is a concrete continuous slab carrying Sth 11 over Bass Creek in Rock County, Wisconsin. It was built in 1958, so it is 67 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 4,400 vehicles a day, roughly 9% of them trucks, projected to reach 7,270 by 2043. The structure is 83 ft (25.2 m) long and 34 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesSth 11
CrossesBass Creek
Location3.5M E JCT Sth 213
RouteState Highway 11
CountyRock County
StateWisconsin
Coordinates42.6628, -89.20957
Functional classRural Principal Arterial - Other

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 inspectionMarch 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length83 ft (25.2 m)
Longest span41 ft (12.5 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,400 (2022)
Projected traffic7,270 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 11 over Bass Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Sth 11 over Bass 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 March 2024.

How much traffic does Sth 11 over Bass Creek carry?

About 4,400 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Sth 11 over Bass Creek?

The structure is 83 ft (25.2 m) long with a longest span of 41 ft (12.5 m) and a deck 34 ft wide.

Who owns Sth 11 over Bass Creek?

It is owned by the State Highway Agency.