US Bridges

US 51 over Drainage Ditch

Good

Jackson County, Illinois · Scl of Dowell · Structure no. 039203000000000

Built
2017
8 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete Continuous
Length
52 ft
4 main spans
Daily traffic
6,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 51 over Drainage Ditch is a concrete continuous culvert carrying US 51 over Drainage Ditch in Jackson County, Illinois. It was built in 2017, so it is 8 years old, younger than the Illinois average of 45.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,000 vehicles a day, roughly 6% of them trucks, projected to reach 6,464 by 2046. The structure is 52 ft (15.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 51
CrossesDrainage Ditch
LocationScl of Dowell
RouteU.S. Route 51
Coordinates37.9375, -89.23409
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.9 US tons
Inventory rating49.3 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 25 or greater
Structure length52 ft (15.8 m)
Longest span13 ft (3.9 m)
Deck width0 ft (0 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,000 (2023)
Projected traffic6,464 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 US 51 over Drainage Ditch built?

It was built in 2017, making it 8 years old in 2025.

What condition is US 51 over Drainage Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does US 51 over Drainage Ditch carry?

About 6,000 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 51 over Drainage Ditch?

The structure is 52 ft (15.8 m) long with a longest span of 13 ft (3.9 m).

Who owns US 51 over Drainage Ditch?

It is owned by the State Highway Agency.