US Bridges

46th Ave DR over Drainage Ditch

Poor

Rock Island County, Illinois · E of 16 ST Southpark · Structure no. 081605500000000

Built
1973
52 years old
Condition
Poor
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
1 main span
Daily traffic
1,600
2020 count
Owner
Private
Private (other than railroad)

About this bridge

46th Ave DR over Drainage Ditch is a steel stringer/multi-beam or girder carrying 46th Ave DR over Drainage Ditch in Rock Island County, Illinois. It was built in 1973, so it is 52 years old, older than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,600 vehicles a day, roughly 3% of them trucks, projected to reach 1,616 by 2046. The structure is 61 ft (18.6 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries46th Ave DR
CrossesDrainage Ditch
LocationE of 16 ST Southpark
RouteCity Street 0
Coordinates41.46699, -90.50682
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.9 US tons
Inventory rating41.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span59 ft (18 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2020)
Projected traffic1,616 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerPrivate (other than railroad)
Maintained byPrivate (other than railroad)
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 46th Ave DR over Drainage Ditch built?

It was built in 1973, making it 52 years old in 2025.

What condition is 46th Ave DR over Drainage Ditch in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does 46th Ave DR over Drainage Ditch carry?

About 1,600 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is 46th Ave DR over Drainage Ditch?

The structure is 61 ft (18.6 m) long with a longest span of 59 ft (18 m) and a deck 34 ft wide.

Who owns 46th Ave DR over Drainage Ditch?

It is owned by the Private (other than railroad).