US Bridges

Sth 21/116-ADAMS-S over Fox River

Fair

Winnebago County, Wisconsin · 0.1M E JCT Sth 116 to E · Structure no. B70005100000000

Built
1971
54 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
559 ft
7 main spans
Daily traffic
11,400
2022 count
Owner
State
State Highway Agency

About this bridge

Sth 21/116-ADAMS-S over Fox River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sth 21/116-ADAMS-S over Fox River in Winnebago County, Wisconsin. It was built in 1971, so it is 54 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 5 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 11,400 vehicles a day, roughly 8% of them trucks, projected to reach 19,500 by 2043. The structure is 559 ft (170.5 m) long and 52 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesSth 21/116-ADAMS-S
CrossesFox River
Location0.1M E JCT Sth 116 to E
RouteState Highway 21
Coordinates44.03983, -88.74703
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.7 US tons
Inventory rating28.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length559 ft (170.5 m)
Longest span80 ft (24.3 m)
Deck width52 ft (15.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,400 (2022)
Projected traffic19,500 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Sth 21/116-ADAMS-S over Fox River built?

It was built in 1971, making it 54 years old in 2025.

What condition is Sth 21/116-ADAMS-S over Fox 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 September 2024.

How much traffic does Sth 21/116-ADAMS-S over Fox River carry?

About 11,400 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Sth 21/116-ADAMS-S over Fox River?

The structure is 559 ft (170.5 m) long with a longest span of 80 ft (24.3 m) and a deck 52 ft wide.

Who owns Sth 21/116-ADAMS-S over Fox River?

It is owned by the State Highway Agency.