US Bridges

Sth 154 over Narrows Creek

Fair

Sauk County, Wisconsin · 5.2M E JCT Sth 23 to E · Structure no. B56009800000000

Built
1991
34 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
99 ft
1 main span
Daily traffic
1,200
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 154 over Narrows Creek is a prestressed concrete stringer/multi-beam or girder carrying Sth 154 over Narrows Creek in Sauk County, Wisconsin. It was built in 1991, so it is 34 years old, younger 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 1,200 vehicles a day, roughly 11% of them trucks, projected to reach 1,440 by 2041. The structure is 99 ft (30.2 m) long and 38 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesSth 154
CrossesNarrows Creek
Location5.2M E JCT Sth 23 to E
RouteState Highway 154
Coordinates43.47492, -89.93406
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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating37.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length99 ft (30.2 m)
Longest span94 ft (28.7 m)
Deck width38 ft (11.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2021)
Projected traffic1,440 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 1991, making it 34 years old in 2025.

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 August 2024.

How much traffic does Sth 154 over Narrows Creek carry?

About 1,200 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Sth 154 over Narrows Creek?

The structure is 99 ft (30.2 m) long with a longest span of 94 ft (28.7 m) and a deck 38 ft wide.

Who owns Sth 154 over Narrows Creek?

It is owned by the State Highway Agency.