US Bridges

Cth M over Bostwick Creek

Fair

La Crosse County, Wisconsin · 0.3M N JCT Cth I · Structure no. B32000700000000

Built
1952
73 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
73 ft
1 main span
Daily traffic
2,100
2021 count
Owner
County
County Highway Agency

About this bridge

Cth M over Bostwick Creek is a steel stringer/multi-beam or girder carrying Cth M over Bostwick Creek in La Crosse County, Wisconsin. It was built in 1952, so it is 73 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 2,100 vehicles a day, projected to reach 2,520 by 2041. The structure is 73 ft (22.3 m) long and 26 ft wide. If it were closed, the detour would be 10.6 mi (17 km).

Location

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CarriesCth M
CrossesBostwick Creek
Location0.3M N JCT Cth I
RouteCounty Highway 0M
CountyLa Crosse County
StateWisconsin
Coordinates43.82952, -91.0612
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating21.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length73 ft (22.3 m)
Longest span71 ft (21.7 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2021)
Projected traffic2,520 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed10.6 mi (17 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$427,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth M over Bostwick Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is Cth M over Bostwick 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 April 2023.

How much traffic does Cth M over Bostwick Creek carry?

About 2,100 vehicles per day (2021 count).

How long is Cth M over Bostwick Creek?

The structure is 73 ft (22.3 m) long with a longest span of 71 ft (21.7 m) and a deck 26 ft wide.

Who owns Cth M over Bostwick Creek?

It is owned by the County Highway Agency.