US Bridges

FAS 294/OLD 66A NB over Mackinaw River

Good

McLean County, Illinois · 8.45 MI S of US 24 · Structure no. 057003500000000

Built
1954
71 years old, rebuilt 2000
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
204 ft
4 main spans
Daily traffic
2,650
2024 count
Owner
State
State Highway Agency

About this bridge

FAS 294/OLD 66A NB over Mackinaw River is a prestressed concrete stringer/multi-beam or girder carrying FAS 294/OLD 66A NB over Mackinaw River in McLean County, Illinois. It was built in 1954 and reconstructed in 2000, so it is 71 years old, older 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 2,650 vehicles a day, roughly 9% of them trucks, projected to reach 2,650 by 2046. The structure is 204 ft (62.2 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFAS 294/OLD 66A NB
CrossesMackinaw River
Location8.45 MI S of US 24
RouteCounty Highway 0
Coordinates40.63194, -88.79962
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.6 US tons
Inventory rating55 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length204 ft (62.2 m)
Longest span57 ft (17.4 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2024)
Projected traffic2,650 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 294/OLD 66A NB over Mackinaw River built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 2000.

What condition is FAS 294/OLD 66A NB over 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 February 2023.

How much traffic does FAS 294/OLD 66A NB over Mackinaw River carry?

About 2,650 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is FAS 294/OLD 66A NB over Mackinaw River?

The structure is 204 ft (62.2 m) long with a longest span of 57 ft (17.4 m) and a deck 34 ft wide.

Who owns FAS 294/OLD 66A NB over Mackinaw River?

It is owned by the State Highway Agency.