US Bridges

FAP-821 (ILL-15) over Two Mile Ck

Fair

Jefferson County, Illinois · 3 MI E Mt Vernon · Structure no. 041200100000000

Built
1958
67 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
45 ft
3 main spans
Daily traffic
4,600
2023 count
Owner
State
State Highway Agency

About this bridge

FAP-821 (ILL-15) over Two Mile Ck is a concrete continuous culvert carrying FAP-821 (ILL-15) over Two Mile Ck in Jefferson County, Illinois. It was built in 1958, so it is 67 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 4,600 vehicles a day, roughly 9% of them trucks, projected to reach 4,242 by 2046. The structure is 45 ft (13.6 m) long. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesFAP-821 (ILL-15)
CrossesTwo Mile Ck
Location3 MI E Mt Vernon
RouteState Highway 15
CountyJefferson County
StateIllinois
Coordinates38.32198, -88.83703
Functional classUrban Other Principal 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length45 ft (13.6 m)
Longest span15 ft (4.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,600 (2023)
Projected traffic4,242 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP-821 (ILL-15) over Two Mile Ck built?

It was built in 1958, making it 67 years old in 2025.

What condition is FAP-821 (ILL-15) over Two Mile Ck 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 January 2025.

How much traffic does FAP-821 (ILL-15) over Two Mile Ck carry?

About 4,600 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is FAP-821 (ILL-15) over Two Mile Ck?

The structure is 45 ft (13.6 m) long with a longest span of 15 ft (4.5 m).

Who owns FAP-821 (ILL-15) over Two Mile Ck?

It is owned by the State Highway Agency.