US Bridges

Ill 121(FAP 320) over Stream

Fair

Moultrie County, Illinois · 1 MI SE Dalton City · Structure no. 070200700000000

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
4,450
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 121(FAP 320) over Stream is a concrete culvert carrying Ill 121(FAP 320) over Stream in Moultrie County, Illinois. It was built in 1971, so it is 54 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 4,450 vehicles a day, roughly 12% of them trucks, projected to reach 4,935 by 2046. The structure is 32 ft (9.9 m) long.

Location

Open in Google Maps
CarriesIll 121(FAP 320)
CrossesStream
Location1 MI SE Dalton City
RouteState Highway 121
CountyMoultrie County
StateIllinois
Coordinates39.70801, -88.79769
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 inspectionJune 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 rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.9 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,450 (2023)
Projected traffic4,935 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 Ill 121(FAP 320) over Stream built?

It was built in 1971, making it 54 years old in 2025.

What condition is Ill 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 June 2023.

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

About 4,450 vehicles per day (2023 count), of which roughly 12% are trucks.

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

The structure is 32 ft (9.9 m) long with a longest span of 11 ft (3.5 m).

Who owns Ill 121(FAP 320) over Stream?

It is owned by the State Highway Agency.