US Bridges

J ST over Winnebago River

Fair

Winnebago County, Iowa · 098243603 · Structure no. 000000000004921

Built
1974
51 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
157 ft
4 main spans
Daily traffic
1,884
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

J ST over Winnebago River is a concrete continuous slab carrying J ST over Winnebago River in Winnebago County, Iowa. It was built in 1974, so it is 51 years old, older than the Iowa average of 45.5 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 1,884 vehicles a day, roughly 4% of them trucks, projected to reach 1,884 by 2043. The structure is 157 ft (47.9 m) long and 39 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesJ ST
CrossesWinnebago River
Location098243603
RouteCity Street 0
CountyWinnebago County
StateIowa
Coordinates43.26339, -93.63004
Functional classRural Minor Collector

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating52.1 US tons
Inventory rating31.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length157 ft (47.9 m)
Longest span44 ft (13.4 m)
Deck width39 ft (12 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,884 (2022)
Projected traffic1,884 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2.8 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was J ST over Winnebago River built?

It was built in 1974, making it 51 years old in 2025.

What condition is J ST over Winnebago 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 March 2023.

How much traffic does J ST over Winnebago River carry?

About 1,884 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is J ST over Winnebago River?

The structure is 157 ft (47.9 m) long with a longest span of 44 ft (13.4 m) and a deck 39 ft wide.

Who owns J ST over Winnebago River?

It is owned by the City or Municipal Highway Agency.