US Bridges

FAP 320 (il 121) over Ditch

Good

Macon County, Illinois · 0.2 MI E of Logan CO · Structure no. 058832700000000

Built
2000
25 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
3,750
2023 count
Owner
State
State Highway Agency

About this bridge

FAP 320 (il 121) over Ditch is a concrete culvert carrying FAP 320 (il 121) over Ditch in Macon County, Illinois. It was built in 2000, so it is 25 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 3,750 vehicles a day, roughly 18% of them trucks, projected to reach 3,838 by 2046. The structure is 22 ft (6.6 m) long. If it were closed, the detour would be 16.8 mi (27 km).

Location

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CarriesFAP 320 (il 121)
CrossesDitch
Location0.2 MI E of Logan CO
RouteState Highway 121
CountyMacon County
StateIllinois
Coordinates39.95868, -89.14028
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 inspectionOctober 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length22 ft (6.6 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,750 (2023)
Projected traffic3,838 by 2046
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 320 (il 121) over Ditch built?

It was built in 2000, making it 25 years old in 2025.

What condition is FAP 320 (il 121) over Ditch 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 October 2024.

How much traffic does FAP 320 (il 121) over Ditch carry?

About 3,750 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is FAP 320 (il 121) over Ditch?

The structure is 22 ft (6.6 m) long with a longest span of 6 ft (1.8 m).

Who owns FAP 320 (il 121) over Ditch?

It is owned by the State Highway Agency.