US Bridges

Il 121 (fap 773) over Mule Creek

Good

Cumberland County, Illinois · 1.7 MI E Montrose RD · Structure no. 018006200000000

Built
2010
15 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
137 ft
2 main spans
Daily traffic
1,600
2023 count
Owner
State
State Highway Agency

About this bridge

Il 121 (fap 773) over Mule Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 121 (fap 773) over Mule Creek in Cumberland County, Illinois. It was built in 2010, so it is 15 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 1,600 vehicles a day, roughly 17% of them trucks, projected to reach 1,768 by 2046. The structure is 137 ft (41.8 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIl 121 (fap 773)
CrossesMule Creek
Location1.7 MI E Montrose RD
RouteState Highway 121
CountyCumberland County
StateIllinois
Coordinates39.2727, -88.34871
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length137 ft (41.8 m)
Longest span79 ft (24.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2023)
Projected traffic1,768 by 2046
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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 773) over Mule Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Il 121 (fap 773) over Mule Creek 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 June 2024.

How much traffic does Il 121 (fap 773) over Mule Creek carry?

About 1,600 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is Il 121 (fap 773) over Mule Creek?

The structure is 137 ft (41.8 m) long with a longest span of 79 ft (24.1 m) and a deck 35 ft wide.

Who owns Il 121 (fap 773) over Mule Creek?

It is owned by the State Highway Agency.