US Bridges

Lrd Willowbrook RD over Spring Brook

Fair

Rock County, Wisconsin · 0.6M N JCT Colley RD · Structure no. P53073800000000

Built
1989
36 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
80 ft
2 main spans
Daily traffic
4,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lrd Willowbrook RD over Spring Brook is a prestressed concrete continuous stringer/multi-beam or girder carrying Lrd Willowbrook RD over Spring Brook 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 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 4,000 vehicles a day, projected to reach 4,800 by 2043. The structure is 80 ft (24.4 m) long and 39 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesLrd Willowbrook RD
CrossesSpring Brook
Location0.6M N JCT Colley RD
RouteCity Street 0
CountyRock County
StateWisconsin
Coordinates42.51203, -88.99536
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating71.7 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span39 ft (11.9 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2022)
Projected traffic4,800 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 Lrd Willowbrook RD over Spring Brook built?

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

What condition is Lrd Willowbrook RD over Spring Brook 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 November 2024.

How much traffic does Lrd Willowbrook RD over Spring Brook carry?

About 4,000 vehicles per day (2022 count).

How long is Lrd Willowbrook RD over Spring Brook?

The structure is 80 ft (24.4 m) long with a longest span of 39 ft (11.9 m) and a deck 39 ft wide.

Who owns Lrd Willowbrook RD over Spring Brook?

It is owned by the City or Municipal Highway Agency.