US Bridges

Sth 23 over Lowery Creek

Good

Iowa County, Wisconsin · 0.1M E JCT Cth T · Structure no. B25006100000000

Built
1988
37 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete
Length
38 ft
1 main span
Daily traffic
3,600
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 23 over Lowery Creek is a concrete slab carrying Sth 23 over Lowery Creek in Iowa County, Wisconsin. It was built in 1988, so it is 37 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 3,600 vehicles a day, roughly 7% of them trucks, projected to reach 4,230 by 2044. The structure is 38 ft (11.5 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesSth 23
CrossesLowery Creek
Location0.1M E JCT Cth T
RouteState Highway 23
Coordinates43.13464, -90.06443
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment6: Equal to present minimum criteria
Operating rating71.7 US tons
Inventory rating42.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length38 ft (11.5 m)
Longest span36 ft (11 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2022)
Projected traffic4,230 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

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 23 over Lowery Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Sth 23 over Lowery Creek 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 January 2025.

How much traffic does Sth 23 over Lowery Creek carry?

About 3,600 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Sth 23 over Lowery Creek?

The structure is 38 ft (11.5 m) long with a longest span of 36 ft (11 m) and a deck 39 ft wide.

Who owns Sth 23 over Lowery Creek?

It is owned by the State Highway Agency.