US Bridges

Ill 34 over Middle Fork Saline R

Fair

Saline County, Illinois · 2.5 MI N Harrisburg · Structure no. 083003700000000

Built
1914
111 years old, rebuilt 2009
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
53 ft
1 main span
Daily traffic
2,900
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 34 over Middle Fork Saline R is a prestressed concrete box beam or girders - multiple carrying Ill 34 over Middle Fork Saline R in Saline County, Illinois. It was built in 1914 and reconstructed in 2009, so it is 111 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 53 ft (16.3 m) long and 33 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesIll 34
CrossesMiddle Fork Saline R
Location2.5 MI N Harrisburg
RouteState Highway 34
CountySaline County
StateIllinois
Coordinates37.77898, -88.54012
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 protection7 GoodSome minor problems.
Last inspectionJune 2023
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 rating81.5 US tons
Inventory rating48.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length53 ft (16.3 m)
Longest span50 ft (15.1 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10 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$161,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 34 over Middle Fork Saline R built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 2009.

What condition is Ill 34 over Middle Fork Saline R 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 June 2023.

How much traffic does Ill 34 over Middle Fork Saline R carry?

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

How long is Ill 34 over Middle Fork Saline R?

The structure is 53 ft (16.3 m) long with a longest span of 50 ft (15.1 m) and a deck 33 ft wide.

Who owns Ill 34 over Middle Fork Saline R?

It is owned by the State Highway Agency.