US Bridges

Cth X 37th Ave over Sth 29

Poor

Chippewa County, Wisconsin · 0.2M E JCT Sth 29 to E · Structure no. B09003000000000

Built
1966
59 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
256 ft
4 main spans
Daily traffic
5,300
2021 count
Owner
State
State Highway Agency

About this bridge

Cth X 37th Ave over Sth 29 is a steel continuous stringer/multi-beam or girder carrying Cth X 37th Ave over Sth 29 in Chippewa County, Wisconsin. It was built in 1966, so it is 59 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,300 vehicles a day, projected to reach 6,360 by 2041. The structure is 256 ft (78.1 m) long and 35 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCth X 37th Ave
CrossesSth 29
Location0.2M E JCT Sth 29 to E
RouteCounty Highway 0X
CountyChippewa County
StateWisconsin
Coordinates44.91946, -91.33686
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length256 ft (78.1 m)
Longest span79 ft (24.2 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,300 (2021)
Projected traffic6,360 by 2041
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.7 mi (14 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Cth X 37th Ave over Sth 29 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Cth X 37th Ave over Sth 29 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does Cth X 37th Ave over Sth 29 carry?

About 5,300 vehicles per day (2021 count).

How long is Cth X 37th Ave over Sth 29?

The structure is 256 ft (78.1 m) long with a longest span of 79 ft (24.2 m) and a deck 35 ft wide.

Who owns Cth X 37th Ave over Sth 29?

It is owned by the State Highway Agency.