US Bridges

Ill 117 over Mill CR

Fair

Woodford County, Illinois · 3.6 MI S. of US 24 · Structure no. 102004100000000

Built
1975
50 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
80 ft
1 main span
Daily traffic
6,650
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 117 over Mill CR is a prestressed concrete stringer/multi-beam or girder carrying Ill 117 over Mill CR in Woodford County, Illinois. It was built in 1975, so it is 50 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 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 6,650 vehicles a day, roughly 11% of them trucks, projected to reach 5,707 by 2046. The structure is 80 ft (24.4 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIll 117
CrossesMill CR
Location3.6 MI S. of US 24
RouteState Highway 117
CountyWoodford County
StateIllinois
Coordinates40.67018, -89.2769
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.3 US tons
Inventory rating38.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span75 ft (22.9 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,650 (2023)
Projected traffic5,707 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Ill 117 over Mill CR built?

It was built in 1975, making it 50 years old in 2025.

What condition is Ill 117 over Mill CR 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 February 2023.

How much traffic does Ill 117 over Mill CR carry?

About 6,650 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Ill 117 over Mill CR?

The structure is 80 ft (24.4 m) long with a longest span of 75 ft (22.9 m) and a deck 34 ft wide.

Who owns Ill 117 over Mill CR?

It is owned by the State Highway Agency.