US Bridges

Sth 11 EB over Markham CR

Good

Rock County, Wisconsin · 1.5M E of JCT Hanover RD · Structure no. B53020700000000

Built
2002
23 years old
Condition
Good
inspected May 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
2,350
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 11 EB over Markham CR is a prestressed concrete stringer/multi-beam or girder carrying Sth 11 EB over Markham CR in Rock County, Wisconsin. It was built in 2002, so it is 23 years old, younger than the Wisconsin average of 40.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,350 vehicles a day, roughly 10% of them trucks, projected to reach 5,200 by 2040. The structure is 60 ft (18.2 m) long and 42 ft wide.

CarriesSth 11 EB
CrossesMarkham CR
Location1.5M E of JCT Hanover RD
RouteState Highway 11
Coordinates42.64124, -89.07163
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating39.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.2 m)
Longest span56 ft (17 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,350 (2022)
Projected traffic5,200 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Sth 11 EB over Markham CR built?

It was built in 2002, making it 23 years old in 2025.

What condition is Sth 11 EB over Markham CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2021.

How much traffic does Sth 11 EB over Markham CR carry?

About 2,350 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Sth 11 EB over Markham CR?

The structure is 60 ft (18.2 m) long with a longest span of 56 ft (17 m) and a deck 42 ft wide.

Who owns Sth 11 EB over Markham CR?

It is owned by the State Highway Agency.