US Bridges

Ill 84 over Drainage Ditch

Fair

Carroll County, Illinois · 2 MI N Savanna · Structure no. 008001600000000

Built
1929
96 years old, rebuilt 2008
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
1,500
2023 count
Owner
State
State Highway Agency

About this bridge

Ill 84 over Drainage Ditch is a prestressed concrete box beam or girders - multiple carrying Ill 84 over Drainage Ditch in Carroll County, Illinois. It was built in 1929 and reconstructed in 2008, so it is 96 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 1,500 vehicles a day, roughly 16% of them trucks, projected to reach 1,970 by 2046. The structure is 47 ft (14.4 m) long and 33 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

Location

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CarriesIll 84
CrossesDrainage Ditch
Location2 MI N Savanna
RouteState Highway 84
CountyCarroll County
StateIllinois
Coordinates42.13966, -90.16575
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20 + Mod
Structure length47 ft (14.4 m)
Longest span43 ft (13.1 m)
Deck width33 ft (10.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic1,970 by 2046
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ill 84 over Drainage Ditch built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 2008.

What condition is Ill 84 over Drainage 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 May 2023.

How much traffic does Ill 84 over Drainage Ditch carry?

About 1,500 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Ill 84 over Drainage Ditch?

The structure is 47 ft (14.4 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.

Who owns Ill 84 over Drainage Ditch?

It is owned by the State Highway Agency.