US Bridges

Ill 165 over Br Mackinaw River

Good

McLean County, Illinois · 12.1 MI N of Ill 9 · Structure no. 057022100000000

Built
1990
35 years old
Condition
Good
inspected May 2021
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
77 ft
1 main span
Daily traffic
750
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 165 over Br Mackinaw River is a prestressed concrete stringer/multi-beam or girder carrying Ill 165 over Br Mackinaw River in McLean County, Illinois. It was built in 1990, so it is 35 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 750 vehicles a day, roughly 8% of them trucks, projected to reach 808 by 2046. The structure is 77 ft (23.4 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIll 165
CrossesBr Mackinaw River
Location12.1 MI N of Ill 9
RouteState Highway 165
Coordinates40.55928, -88.69024
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating43.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length77 ft (23.4 m)
Longest span74 ft (22.6 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2023)
Projected traffic808 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 165 over Br Mackinaw River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Ill 165 over Br Mackinaw River 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 May 2021.

How much traffic does Ill 165 over Br Mackinaw River carry?

About 750 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Ill 165 over Br Mackinaw River?

The structure is 77 ft (23.4 m) long with a longest span of 74 ft (22.6 m) and a deck 35 ft wide.

Who owns Ill 165 over Br Mackinaw River?

It is owned by the State Highway Agency.