US Bridges

Ill 121(FAP 320) over Stevens Creek

Fair

Macon County, Illinois · NW Edge of Decatur · Structure no. 058011100000000

Built
1984
41 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
308 ft
3 main spans
Daily traffic
7,950
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 121(FAP 320) over Stevens Creek is a steel continuous stringer/multi-beam or girder carrying Ill 121(FAP 320) over Stevens Creek in Macon County, Illinois. It was built in 1984, so it is 41 years old, younger 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 5 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 7,950 vehicles a day, roughly 7% of them trucks, projected to reach 4,242 by 2046. The structure is 308 ft (93.9 m) long and 86 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesIll 121(FAP 320)
CrossesStevens Creek
LocationNW Edge of Decatur
RouteState Highway 121
CountyMacon County
StateIllinois
Coordinates39.87922, -88.98314
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating52.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length308 ft (93.9 m)
Longest span110 ft (33.6 m)
Deck width86 ft (26.2 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,950 (2023)
Projected traffic4,242 by 2046
Trucks7%
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 Ill 121(FAP 320) over Stevens Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Ill 121(FAP 320) over Stevens 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 November 2024.

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

About 7,950 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Ill 121(FAP 320) over Stevens Creek?

The structure is 308 ft (93.9 m) long with a longest span of 110 ft (33.6 m) and a deck 86 ft wide.

Who owns Ill 121(FAP 320) over Stevens Creek?

It is owned by the State Highway Agency.