US Bridges

Il 121 (fap 320) over Whitley Creek

Fair

Coles County, Illinois · 1.5 MI SE Coles · Structure no. 015201300000000

Built
1978
47 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
4,100
2023 count
Owner
State
State Highway Agency

About this bridge

Il 121 (fap 320) over Whitley Creek is a concrete culvert carrying Il 121 (fap 320) over Whitley Creek in Coles County, Illinois. It was built in 1978, so it is 47 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 4,100 vehicles a day, roughly 7% of them trucks, projected to reach 3,788 by 2046. The structure is 38 ft (11.6 m) long and 40 ft wide.

Location

Open in Google Maps
CarriesIl 121 (fap 320)
CrossesWhitley Creek
Location1.5 MI SE Coles
RouteState Highway 121
CountyColes County
StateIllinois
Coordinates39.5092, -88.44873
Functional classRural Principal Arterial - Other

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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span12 ft (3.6 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2023)
Projected traffic3,788 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Il 121 (fap 320) over Whitley Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Il 121 (fap 320) over Whitley Creek 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 2024.

How much traffic does Il 121 (fap 320) over Whitley Creek carry?

About 4,100 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Il 121 (fap 320) over Whitley Creek?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.6 m) and a deck 40 ft wide.

Who owns Il 121 (fap 320) over Whitley Creek?

It is owned by the State Highway Agency.