US Bridges

Lrd Tarrant RD over Blackhawk Creek

Poor

Rock County, Wisconsin · 1.1M N JCT Cth Mm · Structure no. P53009900000000

Built
1989
36 years old
Condition
Poor
inspected August 2024
Type
Culvert
Steel
Length
28 ft
4 main spans
Daily traffic
105
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lrd Tarrant RD over Blackhawk Creek is a steel culvert carrying Lrd Tarrant RD over Blackhawk Creek in Rock County, Wisconsin. It was built in 1989, so it is 36 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 105 vehicles a day, projected to reach 115 by 2043. The structure is 28 ft (8.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLrd Tarrant RD
CrossesBlackhawk Creek
Location1.1M N JCT Cth Mm
RouteCity Street 0
CountyRock County
StateWisconsin
Coordinates42.69567, -88.89478
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 12 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating21.4 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckCorrugated steel
Main spans4
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span5 ft (1.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic105 (2022)
Projected traffic115 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$151,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd Tarrant RD over Blackhawk Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Lrd Tarrant RD over Blackhawk Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Lrd Tarrant RD over Blackhawk Creek carry?

About 105 vehicles per day (2022 count).

How long is Lrd Tarrant RD over Blackhawk Creek?

The structure is 28 ft (8.6 m) long with a longest span of 5 ft (1.6 m).

Who owns Lrd Tarrant RD over Blackhawk Creek?

It is owned by the Town or Township Highway Agency.