US Bridges

Sth 21 over Big Roche a Cri Creek

Fair

Adams County, Wisconsin · 2.9M E JCT Cth Z · Structure no. B01032500000000

Built
1950
75 years old, rebuilt 1993
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
3,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 21 over Big Roche a Cri Creek is a steel stringer/multi-beam or girder carrying Sth 21 over Big Roche a Cri Creek in Adams County, Wisconsin. It was built in 1950 and reconstructed in 1993, so it is 75 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 3,700 vehicles a day, roughly 9% of them trucks, projected to reach 4,440 by 2042. The structure is 62 ft (18.8 m) long and 37 ft wide. If it were closed, the detour would be 30.4 mi (49 km).

Location

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CarriesSth 21
CrossesBig Roche a Cri Creek
Location2.9M E JCT Cth Z
RouteState Highway 21
CountyAdams County
StateWisconsin
Coordinates44.03078, -89.8879
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating57.7 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span61 ft (18.6 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,700 (2022)
Projected traffic4,440 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed30.4 mi (49 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 21 over Big Roche a Cri Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1993.

What condition is Sth 21 over Big Roche a Cri 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 May 2023.

How much traffic does Sth 21 over Big Roche a Cri Creek carry?

About 3,700 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Sth 21 over Big Roche a Cri Creek?

The structure is 62 ft (18.8 m) long with a longest span of 61 ft (18.6 m) and a deck 37 ft wide.

Who owns Sth 21 over Big Roche a Cri Creek?

It is owned by the State Highway Agency.