US Bridges

Il 15 over Elk Horn Creek

Good

Jefferson County, Illinois · 4.4 MI E Wash CO LN · Structure no. 041011400000000

Built
2020
5 years old
Condition
Good
inspected October 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
3,100
2023 count
Owner
State
State Highway Agency

About this bridge

Il 15 over Elk Horn Creek is a steel stringer/multi-beam or girder carrying Il 15 over Elk Horn Creek in Jefferson County, Illinois. It was built in 2020, so it is 5 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 3,100 vehicles a day, roughly 12% of them trucks, projected to reach 2,727 by 2046. The structure is 67 ft (20.3 m) long and 39 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesIl 15
CrossesElk Horn Creek
Location4.4 MI E Wash CO LN
RouteState Highway 15
CountyJefferson County
StateIllinois
Coordinates38.30749, -89.06612
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
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 rating56.8 US tons
Inventory rating43.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length67 ft (20.3 m)
Longest span63 ft (19.3 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2023)
Projected traffic2,727 by 2046
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemNo

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 15 over Elk Horn Creek built?

It was built in 2020, making it 5 years old in 2025.

What condition is Il 15 over Elk Horn 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 October 2022.

How much traffic does Il 15 over Elk Horn Creek carry?

About 3,100 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Il 15 over Elk Horn Creek?

The structure is 67 ft (20.3 m) long with a longest span of 63 ft (19.3 m) and a deck 39 ft wide.

Who owns Il 15 over Elk Horn Creek?

It is owned by the State Highway Agency.