US Bridges

Il 1 over Gay Creek

Good

Iroquois County, Illinois · 3.2 M N of Il 9 · Structure no. 038202300000000

Built
2019
6 years old
Condition
Good
inspected March 2022
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
2,200
2023 count
Owner
State
State Highway Agency

About this bridge

Il 1 over Gay Creek is a concrete culvert carrying Il 1 over Gay Creek in Iroquois County, Illinois. It was built in 2019, so it is 6 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,200 vehicles a day, roughly 15% of them trucks, projected to reach 2,879 by 2046. The structure is 24 ft (7.2 m) long and 57 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIl 1
CrossesGay Creek
Location3.2 M N of Il 9
RouteState Highway 1
CountyIroquois County
StateIllinois
Coordinates40.50523, -87.69131
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating64.3 US tons
Inventory rating51.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length24 ft (7.2 m)
Longest span11 ft (3.3 m)
Deck width57 ft (17.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2023)
Projected traffic2,879 by 2046
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Il 1 over Gay Creek built?

It was built in 2019, making it 6 years old in 2025.

What condition is Il 1 over Gay Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2022.

How much traffic does Il 1 over Gay Creek carry?

About 2,200 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is Il 1 over Gay Creek?

The structure is 24 ft (7.2 m) long with a longest span of 11 ft (3.3 m) and a deck 57 ft wide.

Who owns Il 1 over Gay Creek?

It is owned by the State Highway Agency.