US Bridges

Cth 6th ST Cth D over Lenigan Creek

Fair

Rock County, Wisconsin · 0.5M N JCT Sth 81 · Structure no. P53071200000000

Built
1948
77 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
66 ft
4 main spans
Daily traffic
11,300
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Cth 6th ST Cth D over Lenigan Creek is a concrete continuous culvert carrying Cth 6th ST Cth D over Lenigan Creek in Rock County, Wisconsin. It was built in 1948, so it is 77 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 11,300 vehicles a day, projected to reach 13,560 by 2043. The structure is 66 ft (20 m) long and 66 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesCth 6th ST Cth D
CrossesLenigan Creek
Location0.5M N JCT Sth 81
RouteCounty Highway 0D
CountyRock County
StateWisconsin
Coordinates42.51752, -89.04118
Functional classUrban 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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length66 ft (20 m)
Longest span15 ft (4.6 m)
Deck width66 ft (20.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,300 (2022)
Projected traffic13,560 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 6th ST Cth D over Lenigan Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is Cth 6th ST Cth D over Lenigan 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 July 2024.

How much traffic does Cth 6th ST Cth D over Lenigan Creek carry?

About 11,300 vehicles per day (2022 count).

How long is Cth 6th ST Cth D over Lenigan Creek?

The structure is 66 ft (20 m) long with a longest span of 15 ft (4.6 m) and a deck 66 ft wide.

Who owns Cth 6th ST Cth D over Lenigan Creek?

It is owned by the City or Municipal Highway Agency.