US Bridges

TR 21 over Clary Creek

Fair

Menard County, Illinois · 1.5MI SW Oakford · Structure no. 065302700000000

Built
1957
68 years old, rebuilt 1997
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
111 ft
3 main spans
Daily traffic
50
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 21 over Clary Creek is a concrete continuous slab carrying TR 21 over Clary Creek in Menard County, Illinois. It was built in 1957 and reconstructed in 1997, so it is 68 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 6 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 50 vehicles a day, roughly 20% of them trucks, projected to reach 51 by 2046. The structure is 111 ft (33.8 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTR 21
CrossesClary Creek
Location1.5MI SW Oakford
RouteCounty Highway 0
CountyMenard County
StateIllinois
Coordinates40.07561, -89.99014
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length111 ft (33.8 m)
Longest span41 ft (12.6 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic51 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$192,000
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 21 over Clary Creek built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1997.

What condition is TR 21 over Clary 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 2023.

How much traffic does TR 21 over Clary Creek carry?

About 50 vehicles per day (2020 count), of which roughly 20% are trucks.

How long is TR 21 over Clary Creek?

The structure is 111 ft (33.8 m) long with a longest span of 41 ft (12.6 m) and a deck 24 ft wide.

Who owns TR 21 over Clary Creek?

It is owned by the Town or Township Highway Agency.