US Bridges

Il 64 FAP 17 over S Br Kishwaukee Riv.

Fair

DeKalb County, Illinois · 1.5 MI W JCT Il 23 · Structure no. 019001200000000

Built
1940
85 years old, rebuilt 1983
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
121 ft
2 main spans
Daily traffic
7,650
2023 count
Owner
State
State Highway Agency

About this bridge

Il 64 FAP 17 over S Br Kishwaukee Riv. is a steel continuous stringer/multi-beam or girder carrying Il 64 FAP 17 over S Br Kishwaukee Riv. in DeKalb County, Illinois. It was built in 1940 and reconstructed in 1983, so it is 85 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 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 7,650 vehicles a day, roughly 15% of them trucks, projected to reach 8,456 by 2046. The structure is 121 ft (37 m) long and 37 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

Location

Open in Google Maps
CarriesIl 64 FAP 17
CrossesS Br Kishwaukee Riv.
Location1.5 MI W JCT Il 23
RouteState Highway 64
CountyDeKalb County
StateIllinois
Coordinates41.99674, -88.72224
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.
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 within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.5 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length121 ft (37 m)
Longest span59 ft (18 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,650 (2023)
Projected traffic8,456 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 Il 64 FAP 17 over S Br Kishwaukee Riv. built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1983.

What condition is Il 64 FAP 17 over S Br Kishwaukee Riv. 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 Il 64 FAP 17 over S Br Kishwaukee Riv. carry?

About 7,650 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Il 64 FAP 17 over S Br Kishwaukee Riv.?

The structure is 121 ft (37 m) long with a longest span of 59 ft (18 m) and a deck 37 ft wide.

Who owns Il 64 FAP 17 over S Br Kishwaukee Riv.?

It is owned by the State Highway Agency.