US Bridges

Sth 161 over Tomorrow River

Fair

Portage County, Wisconsin · 0.1M W JCT Cth Q · Structure no. B49012400000000

Built
2007
18 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
59 ft
1 main span
Daily traffic
2,400
2021 count
Owner
State
State Highway Agency

About this bridge

Sth 161 over Tomorrow River is a prestressed concrete stringer/multi-beam or girder carrying Sth 161 over Tomorrow River in Portage County, Wisconsin. It was built in 2007, so it is 18 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 2,400 vehicles a day, projected to reach 3,000 by 2042. The structure is 59 ft (17.9 m) long and 43 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
CarriesSth 161
CrossesTomorrow River
Location0.1M W JCT Cth Q
RouteState Highway 161
CountyPortage County
StateWisconsin
Coordinates44.50394, -89.32222
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating68.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length59 ft (17.9 m)
Longest span55 ft (16.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2021)
Projected traffic3,000 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 161 over Tomorrow River built?

It was built in 2007, making it 18 years old in 2025.

What condition is Sth 161 over Tomorrow River 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 161 over Tomorrow River carry?

About 2,400 vehicles per day (2021 count).

How long is Sth 161 over Tomorrow River?

The structure is 59 ft (17.9 m) long with a longest span of 55 ft (16.8 m) and a deck 43 ft wide.

Who owns Sth 161 over Tomorrow River?

It is owned by the State Highway Agency.