US Bridges

39th Ave over Drainage Ditch

Poor

Rock Island County, Illinois · W Edge of 27th ST · Structure no. 081204100000000

Built
1972
53 years old
Condition
Poor
inspected June 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
1,600
2020 count
Owner
State
State Highway Agency

About this bridge

39th Ave over Drainage Ditch is a concrete culvert carrying 39th Ave over Drainage Ditch in Rock Island County, Illinois. It was built in 1972, so it is 53 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 10% of them trucks, projected to reach 1,616 by 2046. The structure is 22 ft (6.7 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries39th Ave
CrossesDrainage Ditch
LocationW Edge of 27th ST
RouteCity Street 0
CountyRock Island County
StateIllinois
Coordinates41.47339, -90.49936
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating23.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span11 ft (3.4 m)
Deck width31 ft (9.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,600 (2020)
Projected traffic1,616 by 2046
Trucks10%
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

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 39th Ave over Drainage Ditch built?

It was built in 1972, making it 53 years old in 2025.

What condition is 39th Ave 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 June 2024.

How much traffic does 39th Ave over Drainage Ditch carry?

About 1,600 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is 39th Ave over Drainage Ditch?

The structure is 22 ft (6.7 m) long with a longest span of 11 ft (3.4 m) and a deck 31 ft wide.

Who owns 39th Ave over Drainage Ditch?

It is owned by the State Highway Agency.