US Bridges

Ill 34 over Middle Fork Ditch

Fair

Saline County, Illinois · 2.1 MI N Harrisburg · Structure no. 083003800000000

Built
1932
93 years old, rebuilt 2009
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
2,900
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 34 over Middle Fork Ditch is a prestressed concrete box beam or girders - multiple carrying Ill 34 over Middle Fork Ditch in Saline County, Illinois. It was built in 1932 and reconstructed in 2009, so it is 93 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 2,900 vehicles a day, roughly 9% of them trucks, projected to reach 3,384 by 2046. The structure is 155 ft (47.3 m) long and 33 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesIll 34
CrossesMiddle Fork Ditch
Location2.1 MI N Harrisburg
RouteState Highway 34
Coordinates37.77391, -88.54016
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length155 ft (47.3 m)
Longest span63 ft (19.2 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2023)
Projected traffic3,384 by 2046
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$467,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 34 over Middle Fork Ditch built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2009.

What condition is Ill 34 over Middle Fork Ditch 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 March 2024.

How much traffic does Ill 34 over Middle Fork Ditch carry?

About 2,900 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Ill 34 over Middle Fork Ditch?

The structure is 155 ft (47.3 m) long with a longest span of 63 ft (19.2 m) and a deck 33 ft wide.

Who owns Ill 34 over Middle Fork Ditch?

It is owned by the State Highway Agency.