US Bridges

FAP-821 (ILL-15) over FAI-57

Poor

Jefferson County, Illinois · I-57 Interchange · Structure no. 041002500000000

Built
1968
57 years old
Condition
Poor
inspected November 2024
Type
Frame
Steel Continuous
Length
330 ft
4 main spans
Daily traffic
18,800
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-821 (ILL-15) over FAI-57 is a steel continuous frame carrying FAP-821 (ILL-15) over FAI-57 in Jefferson County, Illinois. It was built in 1968, so it is 57 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 18,800 vehicles a day, roughly 13% of them trucks, projected to reach 18,281 by 2046. The structure is 330 ft (100.6 m) long and 88 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesFAP-821 (ILL-15)
CrossesFAI-57
LocationI-57 Interchange
RouteState Highway 15
CountyJefferson County
StateIllinois
Coordinates38.31267, -88.95169
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.4 US tons
Inventory rating34.6 US tons

Structure

Structure typeFrame
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length330 ft (100.6 m)
Longest span120 ft (36.6 m)
Deck width88 ft (26.7 m)
Roadway width68 ft (20.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,800 (2023)
Projected traffic18,281 by 2046
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAP-821 (ILL-15) over FAI-57 built?

It was built in 1968, making it 57 years old in 2025.

What condition is FAP-821 (ILL-15) over FAI-57 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does FAP-821 (ILL-15) over FAI-57 carry?

About 18,800 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is FAP-821 (ILL-15) over FAI-57?

The structure is 330 ft (100.6 m) long with a longest span of 120 ft (36.6 m) and a deck 88 ft wide.

Who owns FAP-821 (ILL-15) over FAI-57?

It is owned by the State Highway Agency.