US Bridges

Il 84 over Soo Line Rr/City ST

Fair

Carroll County, Illinois · .1 MI S IL64 Savanna · Structure no. 008004100000000

Built
1988
37 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
264 ft
4 main spans
Daily traffic
5,550
2023 count
Owner
State
State Highway Agency

About this bridge

Il 84 over Soo Line Rr/City ST is a prestressed concrete continuous stringer/multi-beam or girder carrying Il 84 over Soo Line Rr/City ST in Carroll County, Illinois. It was built in 1988, so it is 37 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 5,550 vehicles a day, roughly 6% of them trucks, projected to reach 6,010 by 2046. The structure is 264 ft (80.6 m) long and 38 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesIl 84
CrossesSoo Line Rr/City ST
Location.1 MI S IL64 Savanna
RouteState Highway 84
CountyCarroll County
StateIllinois
Coordinates42.08851, -90.13331
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating48.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length264 ft (80.6 m)
Longest span77 ft (23.5 m)
Deck width38 ft (11.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,550 (2023)
Projected traffic6,010 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Il 84 over Soo Line Rr/City ST built?

It was built in 1988, making it 37 years old in 2025.

What condition is Il 84 over Soo Line Rr/City ST 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 2023.

How much traffic does Il 84 over Soo Line Rr/City ST carry?

About 5,550 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Il 84 over Soo Line Rr/City ST?

The structure is 264 ft (80.6 m) long with a longest span of 77 ft (23.5 m) and a deck 38 ft wide.

Who owns Il 84 over Soo Line Rr/City ST?

It is owned by the State Highway Agency.