US Bridges

Cth Z over Big Sandy Creek

Fair

Marathon County, Wisconsin · 1.2M E JCT Cth J · Structure no. B37009400000000

Built
1962
63 years old, rebuilt 2002
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
113 ft
2 main spans
Daily traffic
1,250
2023 count
Owner
County
County Highway Agency

About this bridge

Cth Z over Big Sandy Creek is a steel continuous stringer/multi-beam or girder carrying Cth Z over Big Sandy Creek in Marathon County, Wisconsin. It was built in 1962 and reconstructed in 2002, so it is 63 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 1,250 vehicles a day, projected to reach 1,353 by 2042. The structure is 113 ft (34.4 m) long and 28 ft wide. If it were closed, the detour would be 5.6 mi (9 km).

Location

Open in Google Maps
CarriesCth Z
CrossesBig Sandy Creek
Location1.2M E JCT Cth J
RouteCounty Highway 0Z
CountyMarathon County
StateWisconsin
Coordinates44.98821, -89.4682
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
Deck7 GoodSome minor problems.
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating34.2 US tons
Inventory rating19.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length113 ft (34.4 m)
Longest span54 ft (16.5 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2023)
Projected traffic1,353 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5.6 mi (9 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth Z over Big Sandy Creek built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2002.

What condition is Cth Z over Big Sandy 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 Cth Z over Big Sandy Creek carry?

About 1,250 vehicles per day (2023 count).

How long is Cth Z over Big Sandy Creek?

The structure is 113 ft (34.4 m) long with a longest span of 54 ft (16.5 m) and a deck 28 ft wide.

Who owns Cth Z over Big Sandy Creek?

It is owned by the County Highway Agency.