US Bridges

Sth 121 over May Coulee Creek

Fair

Jackson County, Wisconsin · 1.3M E JCT Cth G · Structure no. B27094900000000

Built
1947
78 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
1,200
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 121 over May Coulee Creek is a concrete continuous culvert carrying Sth 121 over May Coulee Creek in Jackson County, Wisconsin. It was built in 1947, so it is 78 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 1,200 vehicles a day, roughly 5% of them trucks, projected to reach 1,590 by 2042. The structure is 23 ft (7.1 m) long. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesSth 121
CrossesMay Coulee Creek
Location1.3M E JCT Cth G
RouteState Highway 121
CountyJackson County
StateWisconsin
Coordinates44.45062, -91.1185
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.8 US tons
Inventory rating48.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length23 ft (7.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2022)
Projected traffic1,590 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 121 over May Coulee Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is Sth 121 over May Coulee 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 Sth 121 over May Coulee Creek carry?

About 1,200 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Sth 121 over May Coulee Creek?

The structure is 23 ft (7.1 m) long with a longest span of 10 ft (3 m).

Who owns Sth 121 over May Coulee Creek?

It is owned by the State Highway Agency.