US Bridges

FAP 320(IL 121) over Stream

Good

Macon County, Illinois · 3.5 MI NW of Decatur · Structure no. 058200900000000

Built
1997
28 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
38 ft
3 main spans
Daily traffic
6,450
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 320(IL 121) over Stream is a concrete culvert carrying FAP 320(IL 121) over Stream in Macon County, Illinois. It was built in 1997, so it is 28 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,450 vehicles a day, roughly 12% of them trucks, projected to reach 6,464 by 2046. The structure is 38 ft (11.5 m) long.

Location

Open in Google Maps
CarriesFAP 320(IL 121)
CrossesStream
Location3.5 MI NW of Decatur
RouteState Highway 121
CountyMacon County
StateIllinois
Coordinates39.91088, -89.03088
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length38 ft (11.5 m)
Longest span9 ft (2.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,450 (2023)
Projected traffic6,464 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 FAP 320(IL 121) over Stream built?

It was built in 1997, making it 28 years old in 2025.

What condition is FAP 320(IL 121) over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

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

About 6,450 vehicles per day (2023 count), of which roughly 12% are trucks.

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

The structure is 38 ft (11.5 m) long with a longest span of 9 ft (2.6 m).

Who owns FAP 320(IL 121) over Stream?

It is owned by the State Highway Agency.