US Bridges

Il 72 FAP 553 over Lee Slough

Fair

DeKalb County, Illinois · 1.5 MI W Kingston · Structure no. 019003400000000

Built
1987
38 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
74 ft
2 main spans
Daily traffic
2,300
2023 count
Owner
State
State Highway Agency

About this bridge

Il 72 FAP 553 over Lee Slough is a prestressed concrete stringer/multi-beam or girder carrying Il 72 FAP 553 over Lee Slough in DeKalb County, Illinois. It was built in 1987, so it is 38 years old, younger 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 2,300 vehicles a day, roughly 18% of them trucks, projected to reach 2,856 by 2046. The structure is 74 ft (22.6 m) long and 33 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesIl 72 FAP 553
CrossesLee Slough
Location1.5 MI W Kingston
RouteState Highway 72
CountyDeKalb County
StateIllinois
Coordinates42.09536, -88.79264
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating54.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length74 ft (22.6 m)
Longest span43 ft (13 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic2,856 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 72 FAP 553 over Lee Slough built?

It was built in 1987, making it 38 years old in 2025.

What condition is Il 72 FAP 553 over Lee Slough 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 December 2024.

How much traffic does Il 72 FAP 553 over Lee Slough carry?

About 2,300 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Il 72 FAP 553 over Lee Slough?

The structure is 74 ft (22.6 m) long with a longest span of 43 ft (13 m) and a deck 33 ft wide.

Who owns Il 72 FAP 553 over Lee Slough?

It is owned by the State Highway Agency.