US Bridges

Ill 34 & 145 over So Fork Saline River

Good

Saline County, Illinois · 1.0 MI N of Ill 145 · Structure no. 083002000000000

Built
1923
102 years old, rebuilt 2008
Condition
Good
inspected March 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
119 ft
2 main spans
Daily traffic
4,100
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 34 & 145 over So Fork Saline River is a prestressed concrete box beam or girders - multiple carrying Ill 34 & 145 over So Fork Saline River in Saline County, Illinois. It was built in 1923 and reconstructed in 2008, so it is 102 years old, older 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 4,100 vehicles a day, roughly 6% of them trucks, projected to reach 4,343 by 2046. The structure is 119 ft (36.4 m) long and 33 ft wide. If it were closed, the detour would be 65.9 mi (106 km).

Location

Open in Google Maps
CarriesIll 34 & 145
CrossesSo Fork Saline River
Location1.0 MI N of Ill 145
RouteState Highway 34
CountySaline County
StateIllinois
Coordinates37.65587, -88.53674
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length119 ft (36.4 m)
Longest span59 ft (17.9 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2023)
Projected traffic4,343 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.9 mi (106 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$926,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 34 & 145 over So Fork Saline River built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 2008.

What condition is Ill 34 & 145 over So Fork Saline River 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 March 2022.

How much traffic does Ill 34 & 145 over So Fork Saline River carry?

About 4,100 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Ill 34 & 145 over So Fork Saline River?

The structure is 119 ft (36.4 m) long with a longest span of 59 ft (17.9 m) and a deck 33 ft wide.

Who owns Ill 34 & 145 over So Fork Saline River?

It is owned by the State Highway Agency.