US Bridges

Cth C over Mill Creek

Fair

Iowa County, Wisconsin · 0.6M S JCT Ush 14 · Structure no. B25093900000000

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete Continuous
Length
95 ft
3 main spans
Daily traffic
980
2022 count
Owner
County
County Highway Agency

About this bridge

Cth C over Mill Creek is a concrete continuous slab carrying Cth C over Mill Creek in Iowa County, Wisconsin. It was built in 1981, so it is 44 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 980 vehicles a day, projected to reach 1,176 by 2042. The structure is 95 ft (29 m) long and 30 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesCth C
CrossesMill Creek
Location0.6M S JCT Ush 14
RouteCounty Highway 0C
CountyIowa County
StateWisconsin
Coordinates43.15403, -90.02703
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
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 geometry5: 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 rating57.7 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length95 ft (29 m)
Longest span37 ft (11.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic980 (2022)
Projected traffic1,176 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 C over Mill Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Cth C over Mill 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 2024.

How much traffic does Cth C over Mill Creek carry?

About 980 vehicles per day (2022 count).

How long is Cth C over Mill Creek?

The structure is 95 ft (29 m) long with a longest span of 37 ft (11.4 m) and a deck 30 ft wide.

Who owns Cth C over Mill Creek?

It is owned by the County Highway Agency.