US Bridges

Johnston RD (tr 28 over Corlock Branch

Good

Madison County, Illinois · 2.5MI Semarine · Structure no. 060332400000000

Built
1999
26 years old
Condition
Good
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
100
2021 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Johnston RD (tr 28 over Corlock Branch is a prestressed concrete box beam or girders - multiple carrying Johnston RD (tr 28 over Corlock Branch in Madison County, Illinois. It was built in 1999, so it is 26 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 100 vehicles a day, roughly 8% of them trucks, projected to reach 107 by 2046. The structure is 52 ft (15.8 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesJohnston RD (tr 28
CrossesCorlock Branch
Location2.5MI Semarine
RouteCounty Highway 0
CountyMadison County
StateIllinois
Coordinates38.75701, -89.7508
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than 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

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span49 ft (14.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2021)
Projected traffic107 by 2046
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Johnston RD (tr 28 over Corlock Branch built?

It was built in 1999, making it 26 years old in 2025.

What condition is Johnston RD (tr 28 over Corlock Branch 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 April 2024.

How much traffic does Johnston RD (tr 28 over Corlock Branch carry?

About 100 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Johnston RD (tr 28 over Corlock Branch?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (14.9 m) and a deck 28 ft wide.

Who owns Johnston RD (tr 28 over Corlock Branch?

It is owned by the Town or Township Highway Agency.