US Bridges

Cth F over Rock River

Fair

Jefferson County, Wisconsin · 3.9M N JCT IH 94 to E · Structure no. B28000200000000

Built
1950
75 years old, rebuilt 1994
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
174 ft
3 main spans
Daily traffic
5,000
2022 count
Owner
County
County Highway Agency

About this bridge

Cth F over Rock River is a steel continuous stringer/multi-beam or girder carrying Cth F over Rock River in Jefferson County, Wisconsin. It was built in 1950 and reconstructed in 1994, so it is 75 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 5,000 vehicles a day, projected to reach 6,000 by 2042. The structure is 174 ft (53 m) long and 28 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesCth F
CrossesRock River
Location3.9M N JCT IH 94 to E
RouteCounty Highway 0F
CountyJefferson County
StateWisconsin
Coordinates43.11853, -88.59311
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length174 ft (53 m)
Longest span65 ft (19.8 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic6,000 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cth F over Rock River built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1994.

What condition is Cth F 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 F over Rock River carry?

About 5,000 vehicles per day (2022 count).

How long is Cth F over Rock River?

The structure is 174 ft (53 m) long with a longest span of 65 ft (19.8 m) and a deck 28 ft wide.

Who owns Cth F over Rock River?

It is owned by the County Highway Agency.