US Bridges

Sth 23-STH 154 over Narrows Creek

Good

Sauk County, Wisconsin · 0.2M N of Sth 154 to W · Structure no. B56016800000000

Built
2005
20 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
102 ft
2 main spans
Daily traffic
3,000
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 23-STH 154 over Narrows Creek is a concrete continuous slab carrying Sth 23-STH 154 over Narrows Creek in Sauk County, Wisconsin. It was built in 2005, so it is 20 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 3,000 vehicles a day, roughly 7% of them trucks, projected to reach 3,600 by 2041. The structure is 102 ft (31.2 m) long and 54 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesSth 23-STH 154
CrossesNarrows Creek
Location0.2M N of Sth 154 to W
RouteState Highway 23
CountySauk County
StateWisconsin
Coordinates43.44333, -90.03667
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 protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length102 ft (31.2 m)
Longest span50 ft (15.2 m)
Deck width54 ft (16.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2021)
Projected traffic3,600 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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-STH 154 over Narrows Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Sth 23-STH 154 over Narrows 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 November 2023.

How much traffic does Sth 23-STH 154 over Narrows Creek carry?

About 3,000 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Sth 23-STH 154 over Narrows Creek?

The structure is 102 ft (31.2 m) long with a longest span of 50 ft (15.2 m) and a deck 54 ft wide.

Who owns Sth 23-STH 154 over Narrows Creek?

It is owned by the State Highway Agency.