US Bridges

Township Road #80 over Rocky Fork

Fair

Jackson County, Illinois · East Line SEC.23-7-4 · Structure no. 039317200000000

Built
1984
41 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
25
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Township Road #80 over Rocky Fork is a prestressed concrete box beam or girders - multiple carrying Township Road #80 over Rocky Fork in Jackson County, Illinois. It was built in 1984, so it is 41 years old, younger 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 25 vehicles a day, roughly 32% of them trucks, projected to reach 76 by 2046. The structure is 62 ft (18.9 m) long and 24 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesTownship Road #80
CrossesRocky Fork
LocationEast Line SEC.23-7-4
RouteCounty Highway 0
Coordinates37.9061, -89.50378
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 protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.9 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span59 ft (18 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic76 by 2046
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 Township Road #80 over Rocky Fork built?

It was built in 1984, making it 41 years old in 2025.

What condition is Township Road #80 over Rocky Fork 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 November 2024.

How much traffic does Township Road #80 over Rocky Fork carry?

About 25 vehicles per day (2022 count), of which roughly 32% are trucks.

How long is Township Road #80 over Rocky Fork?

The structure is 62 ft (18.9 m) long with a longest span of 59 ft (18 m) and a deck 24 ft wide.

Who owns Township Road #80 over Rocky Fork?

It is owned by the Town or Township Highway Agency.