US Bridges

TR 363A over Gay Creek

Fair

Iroquois County, Illinois · .8MI W Ill 1 · Structure no. 038440300000000

Built
1963
62 years old
Condition
Fair
inspected August 2024
Type
Channel Beam
Concrete
Length
58 ft
3 main spans
Daily traffic
125
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 363A over Gay Creek is a concrete channel beam carrying TR 363A over Gay Creek in Iroquois County, Illinois. It was built in 1963, so it is 62 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 125 vehicles a day, roughly 26% of them trucks, projected to reach 303 by 2046. The structure is 58 ft (17.7 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesTR 363A
CrossesGay Creek
Location.8MI W Ill 1
RouteCounty Highway 0
CountyIroquois County
StateIllinois
Coordinates40.51694, -87.70753
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 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 rating55.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 15
Structure length58 ft (17.7 m)
Longest span20 ft (6.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2022)
Projected traffic303 by 2046
Trucks26%
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

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 TR 363A over Gay Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is TR 363A 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 August 2024.

How much traffic does TR 363A over Gay Creek carry?

About 125 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is TR 363A over Gay Creek?

The structure is 58 ft (17.7 m) long with a longest span of 20 ft (6.1 m) and a deck 26 ft wide.

Who owns TR 363A over Gay Creek?

It is owned by the Town or Township Highway Agency.