US Bridges

FAS 470-CH 6 over Little Mackinaw Ri

Fair

Tazewell County, Illinois · CTR-8-T23NR2W · Structure no. 090301800000000

Built
1946
79 years old, rebuilt 1980
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
128 ft
3 main spans
Daily traffic
800
2023 count
Owner
County
County Highway Agency

About this bridge

FAS 470-CH 6 over Little Mackinaw Ri is a steel continuous stringer/multi-beam or girder carrying FAS 470-CH 6 over Little Mackinaw Ri in Tazewell County, Illinois. It was built in 1946 and reconstructed in 1980, so it is 79 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 6 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 800 vehicles a day, roughly 9% of them trucks, projected to reach 808 by 2046. The structure is 128 ft (39 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesFAS 470-CH 6
CrossesLittle Mackinaw Ri
LocationCTR-8-T23NR2W
RouteCounty Highway 0
CountyTazewell County
StateIllinois
Coordinates40.45994, -89.35174
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum 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 rating71.1 US tons
Inventory rating42.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span48 ft (14.5 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2023)
Projected traffic808 by 2046
Trucks9%
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

OwnerCounty Highway Agency
Maintained byCounty 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 FAS 470-CH 6 over Little Mackinaw Ri built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 1980.

What condition is FAS 470-CH 6 over Little Mackinaw Ri 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 January 2025.

How much traffic does FAS 470-CH 6 over Little Mackinaw Ri carry?

About 800 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is FAS 470-CH 6 over Little Mackinaw Ri?

The structure is 128 ft (39 m) long with a longest span of 48 ft (14.5 m) and a deck 30 ft wide.

Who owns FAS 470-CH 6 over Little Mackinaw Ri?

It is owned by the County Highway Agency.