US Bridges

Sth 154 over Narrows Creek

Fair

Sauk County, Wisconsin · 6.4M E JCT Sth 130 · Structure no. B56001100000000

Built
1949
76 years old, rebuilt 1991
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
126 ft
2 main spans
Daily traffic
1,700
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 154 over Narrows Creek is a steel continuous stringer/multi-beam or girder carrying Sth 154 over Narrows Creek in Sauk County, Wisconsin. It was built in 1949 and reconstructed in 1991, so it is 76 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 6 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 1,700 vehicles a day, roughly 9% of them trucks, projected to reach 2,100 by 2042. The structure is 126 ft (38.5 m) long and 29 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

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CarriesSth 154
CrossesNarrows Creek
Location6.4M E JCT Sth 130
RouteState Highway 154
CountySauk County
StateWisconsin
Coordinates43.44024, -90.04421
Functional classRural 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length126 ft (38.5 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,700 (2022)
Projected traffic2,100 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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 154 over Narrows Creek built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1991.

What condition is Sth 154 over Narrows Creek 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 June 2023.

How much traffic does Sth 154 over Narrows Creek carry?

About 1,700 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is Sth 154 over Narrows Creek?

The structure is 126 ft (38.5 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns Sth 154 over Narrows Creek?

It is owned by the State Highway Agency.