US Bridges

FAS 329 Ch 10 Sa 1 over Gay Creek

Fair

Iroquois County, Illinois · 1.32 MI W Old Ill 1 · Structure no. 038007000000000

Built
1961
64 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
82 ft
3 main spans
Daily traffic
500
2022 count
Owner
County
County Highway Agency

About this bridge

FAS 329 Ch 10 Sa 1 over Gay Creek is a concrete continuous slab carrying FAS 329 Ch 10 Sa 1 over Gay Creek in Iroquois County, Illinois. It was built in 1961, so it is 64 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 5 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 500 vehicles a day, roughly 14% of them trucks, projected to reach 480 by 2046. The structure is 82 ft (25 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesFAS 329 Ch 10 Sa 1
CrossesGay Creek
Location1.32 MI W Old Ill 1
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.56, -87.71813
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating52.9 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length82 ft (25 m)
Longest span30 ft (9.1 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2022)
Projected traffic480 by 2046
Trucks14%
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 329 Ch 10 Sa 1 over Gay Creek built?

It was built in 1961, making it 64 years old in 2025.

What condition is FAS 329 Ch 10 Sa 1 over Gay 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 September 2024.

How much traffic does FAS 329 Ch 10 Sa 1 over Gay Creek carry?

About 500 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is FAS 329 Ch 10 Sa 1 over Gay Creek?

The structure is 82 ft (25 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns FAS 329 Ch 10 Sa 1 over Gay Creek?

It is owned by the County Highway Agency.