US Bridges

FAS Rt 924 over Cache River

Fair

Union County, Illinois · 4 MI NE Anna · Structure no. 091312100000000

Built
1976
49 years old
Condition
Fair
inspected December 2023
Type
Channel Beam
Concrete
Length
192 ft
5 main spans
Daily traffic
2,200
2020 count
Owner
County
County Highway Agency

About this bridge

FAS Rt 924 over Cache River is a concrete channel beam carrying FAS Rt 924 over Cache River in Union County, Illinois. It was built in 1976, so it is 49 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 2,200 vehicles a day, roughly 5% of them trucks, projected to reach 2,222 by 2046. The structure is 192 ft (58.5 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFAS Rt 924
CrossesCache River
Location4 MI NE Anna
RouteCounty Highway 0
Coordinates37.48545, -89.15131
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
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 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 rating48.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span38 ft (11.6 m)
Deck width34 ft (10.3 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2020)
Projected traffic2,222 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Rt 924 over Cache River built?

It was built in 1976, making it 49 years old in 2025.

What condition is FAS Rt 924 over Cache River 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 December 2023.

How much traffic does FAS Rt 924 over Cache River carry?

About 2,200 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is FAS Rt 924 over Cache River?

The structure is 192 ft (58.5 m) long with a longest span of 38 ft (11.6 m) and a deck 34 ft wide.

Who owns FAS Rt 924 over Cache River?

It is owned by the County Highway Agency.