US Bridges

TR 493 over Middle Fork Creek

Good

Hamilton County, Illinois · 4 MI NW Cornerville · Structure no. 033329000000000

Built
2002
23 years old
Condition
Good
inspected February 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
84 ft
3 main spans
Daily traffic
50
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

TR 493 over Middle Fork Creek is a prestressed concrete box beam or girders - multiple carrying TR 493 over Middle Fork Creek in Hamilton County, Illinois. It was built in 2002, so it is 23 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 50 vehicles a day, roughly 32% of them trucks, projected to reach 25 by 2046. The structure is 84 ft (25.7 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTR 493
CrossesMiddle Fork Creek
Location4 MI NW Cornerville
RouteCounty Highway 0
Coordinates37.92171, -88.69997
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length84 ft (25.7 m)
Longest span30 ft (9.1 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic25 by 2046
Trucks32%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was TR 493 over Middle Fork Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is TR 493 over Middle Fork 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 2024.

How much traffic does TR 493 over Middle Fork Creek carry?

About 50 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is TR 493 over Middle Fork Creek?

The structure is 84 ft (25.7 m) long with a longest span of 30 ft (9.1 m) and a deck 24 ft wide.

Who owns TR 493 over Middle Fork Creek?

It is owned by the Town or Township Highway Agency.