US Bridges

Lrd Shirland Ave over Rock River

Fair

Rock County, Wisconsin · 0.2M W JCT IH 43 · Structure no. B53013600000000

Built
1984
41 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
320 ft
3 main spans
Daily traffic
8,700
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lrd Shirland Ave over Rock River is a prestressed concrete continuous stringer/multi-beam or girder carrying Lrd Shirland Ave over Rock River in Rock County, Wisconsin. It was built in 1984, so it is 41 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 8,700 vehicles a day, projected to reach 10,410 by 2043. The structure is 320 ft (97.6 m) long and 57 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLrd Shirland Ave
CrossesRock River
Location0.2M W JCT IH 43
RouteCity Street 0
CountyRock County
StateWisconsin
Coordinates42.49626, -89.04249
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length320 ft (97.6 m)
Longest span105 ft (32 m)
Deck width57 ft (17.4 m)
Roadway width49 ft (14.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,700 (2022)
Projected traffic10,410 by 2043
Trucks0%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.4 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lrd Shirland Ave over Rock River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Lrd Shirland Ave 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 August 2024.

How much traffic does Lrd Shirland Ave over Rock River carry?

About 8,700 vehicles per day (2022 count).

How long is Lrd Shirland Ave over Rock River?

The structure is 320 ft (97.6 m) long with a longest span of 105 ft (32 m) and a deck 57 ft wide.

Who owns Lrd Shirland Ave over Rock River?

It is owned by the City or Municipal Highway Agency.