US Bridges

Sth 23-STH 154 over Br Narrows Creek

Good

Sauk County, Wisconsin · 0.5M N JCT Cth Ch · Structure no. B56012700000000

Built
1998
27 years old
Condition
Good
inspected June 2021
Type
Stringer/Multi-beam or Girder
Concrete
Length
121 ft
3 main spans
Daily traffic
3,000
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 23-STH 154 over Br Narrows Creek is a concrete stringer/multi-beam or girder carrying Sth 23-STH 154 over Br Narrows Creek in Sauk County, Wisconsin. It was built in 1998, so it is 27 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 6% of them trucks, projected to reach 3,600 by 2041. The structure is 121 ft (36.8 m) long and 46 ft wide. If it were closed, the detour would be 43.5 mi (70 km).

Location

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CarriesSth 23-STH 154
CrossesBr Narrows Creek
Location0.5M N JCT Cth Ch
RouteState Highway 23
CountySauk County
StateWisconsin
Coordinates43.47806, -90.01383
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 inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating70.2 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length121 ft (36.8 m)
Longest span39 ft (12 m)
Deck width46 ft (14 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2021)
Projected traffic3,600 by 2041
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed43.5 mi (70 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 Br Narrows Creek built?

It was built in 1998, making it 27 years old in 2025.

What condition is Sth 23-STH 154 over Br 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 June 2021.

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

About 3,000 vehicles per day (2021 count), of which roughly 6% are trucks.

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

The structure is 121 ft (36.8 m) long with a longest span of 39 ft (12 m) and a deck 46 ft wide.

Who owns Sth 23-STH 154 over Br Narrows Creek?

It is owned by the State Highway Agency.