US Bridges

Il 121(FAP 320) over Stream

Fair

Moultrie County, Illinois · In Bethany · Structure no. 070201000000000

Built
1970
55 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
4,150
2023 count
Owner
State
State Highway Agency

About this bridge

Il 121(FAP 320) over Stream is a concrete culvert carrying Il 121(FAP 320) over Stream in Moultrie County, Illinois. It was built in 1970, so it is 55 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 4,150 vehicles a day, roughly 12% of them trucks, projected to reach 4,673 by 2046. The structure is 23 ft (6.9 m) long.

Location

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CarriesIl 121(FAP 320)
CrossesStream
LocationIn Bethany
RouteState Highway 121
CountyMoultrie County
StateIllinois
Coordinates39.64994, -88.73554
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 rating98.2 US tons
Inventory rating98.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length23 ft (6.9 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,150 (2023)
Projected traffic4,673 by 2046
Trucks12%
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 Stream built?

It was built in 1970, making it 55 years old in 2025.

What condition is Il 121(FAP 320) over Stream 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 April 2023.

How much traffic does Il 121(FAP 320) over Stream carry?

About 4,150 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Il 121(FAP 320) over Stream?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3.2 m).

Who owns Il 121(FAP 320) over Stream?

It is owned by the State Highway Agency.