US Bridges

Fs Rte. 346 over Cedar Creek

Fair

Jackson County, Illinois · 3 MI NW of Pomona · Structure no. 090803000001003

Built
1989
36 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
120 ft
3 main spans
Daily traffic
100
1992 count
Owner
Federal
U.S. Forest Service

About this bridge

Fs Rte. 346 over Cedar Creek is a prestressed concrete box beam or girders - multiple carrying Fs Rte. 346 over Cedar Creek in Jackson County, Illinois. It was built in 1989, so it is 36 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 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 100 vehicles a day, roughly 5% of them trucks, projected to reach 150 by 2045. The structure is 120 ft (36.6 m) long and 24 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesFs Rte. 346
CrossesCedar Creek
Location3 MI NW of Pomona
RouteFederal Lands Road 346
CountyJackson County
StateIllinois
Coordinates37.6382, -89.34295
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span50 ft (15.2 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1992)
Projected traffic150 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Fs Rte. 346 over Cedar Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Fs Rte. 346 over Cedar Creek 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 June 2023.

How much traffic does Fs Rte. 346 over Cedar Creek carry?

About 100 vehicles per day (1992 count), of which roughly 5% are trucks.

How long is Fs Rte. 346 over Cedar Creek?

The structure is 120 ft (36.6 m) long with a longest span of 50 ft (15.2 m) and a deck 24 ft wide.

Who owns Fs Rte. 346 over Cedar Creek?

It is owned by the U.S. Forest Service.