US Bridges

Cth P over Rock River

Fair

Jefferson County, Wisconsin · 0.2M N JCT Cth E · Structure no. B28000100000000

Built
1949
76 years old, rebuilt 1993
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
272 ft
4 main spans
Daily traffic
1,002
2022 count
Owner
County
County Highway Agency

About this bridge

Cth P over Rock River is a steel continuous stringer/multi-beam or girder carrying Cth P over Rock River in Jefferson County, Wisconsin. It was built in 1949 and reconstructed in 1993, so it is 76 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.

It carries about 1,002 vehicles a day, projected to reach 1,102 by 2043. The structure is 272 ft (82.9 m) long and 28 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCth P
CrossesRock River
Location0.2M N JCT Cth E
RouteCounty Highway 0P
CountyJefferson County
StateWisconsin
Coordinates43.14192, -88.64494
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
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 rating26.5 US tons
Inventory rating16.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length272 ft (82.9 m)
Longest span75 ft (22.9 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,002 (2022)
Projected traffic1,102 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 P over Rock River built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1993.

What condition is Cth P over Rock River 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 July 2024.

How much traffic does Cth P over Rock River carry?

About 1,002 vehicles per day (2022 count).

How long is Cth P over Rock River?

The structure is 272 ft (82.9 m) long with a longest span of 75 ft (22.9 m) and a deck 28 ft wide.

Who owns Cth P over Rock River?

It is owned by the County Highway Agency.