US Bridges

Il 84 over Drainage Ditch

Fair

Rock Island County, Illinois · N Edge Port Byron · Structure no. 081004500000000

Built
1931
94 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
4,550
2023 count
Owner
State
State Highway Agency

About this bridge

Il 84 over Drainage Ditch is a concrete slab carrying Il 84 over Drainage Ditch in Rock Island County, Illinois. It was built in 1931, so it is 94 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 4,550 vehicles a day, roughly 11% of them trucks, projected to reach 4,646 by 2046. The structure is 24 ft (7.3 m) long and 55 ft wide. If it were closed, the detour would be 42.9 mi (69 km).

Location

Open in Google Maps
CarriesIl 84
CrossesDrainage Ditch
LocationN Edge Port Byron
RouteState Highway 84
CountyRock Island County
StateIllinois
Coordinates41.62898, -90.33604
Functional classUrban Other Principal 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 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 rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width55 ft (16.8 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,550 (2023)
Projected traffic4,646 by 2046
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.9 mi (69 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 Il 84 over Drainage Ditch built?

It was built in 1931, making it 94 years old in 2025.

What condition is Il 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 April 2024.

How much traffic does Il 84 over Drainage Ditch carry?

About 4,550 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Il 84 over Drainage Ditch?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 55 ft wide.

Who owns Il 84 over Drainage Ditch?

It is owned by the State Highway Agency.