US Bridges

Cth H over Conley Creek

FairPosted for load

Iowa County, Wisconsin · 2.8M S JCT Ush 18 · Structure no. B25000600000000

Built
1958
67 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete Continuous
Length
26 ft
2 main spans
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

Cth H over Conley Creek is a concrete continuous culvert carrying Cth H over Conley Creek in Iowa County, Wisconsin. It was built in 1958, so it is 67 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. Its operating status is: posted for other load-capacity restriction.

It carries about 200 vehicles a day, projected to reach 240 by 2042. The structure is 26 ft (8 m) long. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesCth H
CrossesConley Creek
Location2.8M S JCT Ush 18
RouteCounty Highway 0H
CountyIowa County
StateWisconsin
Coordinates42.96986, -89.96344
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length26 ft (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 traffic200 (2022)
Projected traffic240 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 H over Conley Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Cth H over Conley 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 August 2024.

How much traffic does Cth H over Conley Creek carry?

About 200 vehicles per day (2022 count).

How long is Cth H over Conley Creek?

The structure is 26 ft (8 m) long with a longest span of 12 ft (3.7 m).

Who owns Cth H over Conley Creek?

It is owned by the County Highway Agency.