US Bridges

Cth-Z over Black Wolf Creek

Good

Winnebago County, Wisconsin · 0.01M E JCT Cth-R · Structure no. B70007500000000

Built
1979
46 years old
Condition
Good
inspected October 2023
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
280
2022 count
Owner
County
County Highway Agency

About this bridge

Cth-Z over Black Wolf Creek is a concrete continuous culvert carrying Cth-Z over Black Wolf Creek in Winnebago County, Wisconsin. It was built in 1979, so it is 46 years old, older than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 280 vehicles a day, projected to reach 416 by 2042. The structure is 39 ft (11.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCth-Z
CrossesBlack Wolf Creek
Location0.01M E JCT Cth-R
RouteCounty Highway 0Z
Coordinates43.9081, -88.50327
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating39.2 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length39 ft (11.8 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2022)
Projected traffic416 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Black Wolf Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Cth-Z over Black Wolf Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Cth-Z over Black Wolf Creek carry?

About 280 vehicles per day (2022 count).

How long is Cth-Z over Black Wolf Creek?

The structure is 39 ft (11.8 m) long with a longest span of 12 ft (3.7 m).

Who owns Cth-Z over Black Wolf Creek?

It is owned by the County Highway Agency.