US Bridges

S. Appleton Road over Kishwaukee River

Fair

Boone County, Illinois · S of Lincoln Ave · Structure no. 004700400000000

Built
1964
61 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
1 main span
Daily traffic
11,700
2018 count
Owner
City
City or Municipal Highway Agency

About this bridge

S. Appleton Road over Kishwaukee River is a steel stringer/multi-beam or girder carrying S. Appleton Road over Kishwaukee River in Boone County, Illinois. It was built in 1964, so it is 61 years old, older than the Illinois average of 45.3 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 11,700 vehicles a day, roughly 4% of them trucks, projected to reach 12,168 by 2046. The structure is 74 ft (22.7 m) long and 64 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesS. Appleton Road
CrossesKishwaukee River
LocationS of Lincoln Ave
CountyBoone County
StateIllinois
Coordinates42.25649, -88.86113
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length74 ft (22.7 m)
Longest span71 ft (21.6 m)
Deck width64 ft (19.5 m)
Roadway width56 ft (17.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,700 (2018)
Projected traffic12,168 by 2046
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$345,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S. Appleton Road over Kishwaukee River built?

It was built in 1964, making it 61 years old in 2025.

What condition is S. Appleton Road over Kishwaukee 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 2023.

How much traffic does S. Appleton Road over Kishwaukee River carry?

About 11,700 vehicles per day (2018 count), of which roughly 4% are trucks.

How long is S. Appleton Road over Kishwaukee River?

The structure is 74 ft (22.7 m) long with a longest span of 71 ft (21.6 m) and a deck 64 ft wide.

Who owns S. Appleton Road over Kishwaukee River?

It is owned by the City or Municipal Highway Agency.