US Bridges

Ill 9 over Mackinaw Riv Trib

Fair

Tazewell County, Illinois · .5 MI W of Mackinaw · Structure no. 090017700000000

Built
2011
14 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
94 ft
1 main span
Daily traffic
2,700
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 9 over Mackinaw Riv Trib is a prestressed concrete stringer/multi-beam or girder carrying Ill 9 over Mackinaw Riv Trib in Tazewell County, Illinois. It was built in 2011, so it is 14 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 2,700 vehicles a day, roughly 10% of them trucks, projected to reach 3,283 by 2046. The structure is 94 ft (28.5 m) long and 39 ft wide.

Location

Open in Google Maps
CarriesIll 9
CrossesMackinaw Riv Trib
Location.5 MI W of Mackinaw
RouteState Highway 9
CountyTazewell County
StateIllinois
Coordinates40.5267, -89.37124
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.6 US tons
Inventory rating51.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length94 ft (28.5 m)
Longest span91 ft (27.6 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2023)
Projected traffic3,283 by 2046
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 9 over Mackinaw Riv Trib built?

It was built in 2011, making it 14 years old in 2025.

What condition is Ill 9 over Mackinaw Riv Trib 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 September 2023.

How much traffic does Ill 9 over Mackinaw Riv Trib carry?

About 2,700 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ill 9 over Mackinaw Riv Trib?

The structure is 94 ft (28.5 m) long with a longest span of 91 ft (27.6 m) and a deck 39 ft wide.

Who owns Ill 9 over Mackinaw Riv Trib?

It is owned by the State Highway Agency.