US Bridges

TR 15 over Clifty Creek

Good

Johnson County, Illinois · NW1/4 SEC11 T11S R2E · Structure no. 044309700000000

Built
1985
40 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
26 ft
1 main span
Daily traffic
1,150
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 15 over Clifty Creek is a prestressed concrete box beam or girders - multiple carrying TR 15 over Clifty Creek in Johnson County, Illinois. It was built in 1985, so it is 40 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,150 vehicles a day, roughly 7% of them trucks, projected to reach 1,208 by 2046. The structure is 26 ft (7.9 m) long and 30 ft wide.

CarriesTR 15
CrossesClifty Creek
LocationNW1/4 SEC11 T11S R2E
RouteCounty Highway 0
Coordinates37.58008, -88.95637
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width30 ft (9.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,150 (2021)
Projected traffic1,208 by 2046
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 15 over Clifty Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is TR 15 over Clifty 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 February 2023.

How much traffic does TR 15 over Clifty Creek carry?

About 1,150 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is TR 15 over Clifty Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 30 ft wide.

Who owns TR 15 over Clifty Creek?

It is owned by the Town or Township Highway Agency.