US Bridges

Black Quarter RD over Dry Lane Slough

Good

St. Clair County, Illinois · .5MI NE Il 13 · Structure no. 082415500000000

Built
2010
15 years old
Condition
Good
inspected April 2021
Type
Frame
Concrete
Length
39 ft
1 main span
Daily traffic
50
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Black Quarter RD over Dry Lane Slough is a concrete frame carrying Black Quarter RD over Dry Lane Slough in St. Clair County, Illinois. It was built in 2010, so it is 15 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 50 vehicles a day, roughly 14% of them trucks, projected to reach 76 by 2046. The structure is 39 ft (11.8 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesBlack Quarter RD
CrossesDry Lane Slough
Location.5MI NE Il 13
RouteCounty Highway 0
CountySt. Clair County
StateIllinois
Coordinates38.34764, -89.87555
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length39 ft (11.8 m)
Longest span37 ft (11.4 m)
Deck width27 ft (8.3 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic76 by 2046
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Black Quarter RD over Dry Lane Slough built?

It was built in 2010, making it 15 years old in 2025.

What condition is Black Quarter RD over Dry Lane Slough 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 April 2021.

How much traffic does Black Quarter RD over Dry Lane Slough carry?

About 50 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Black Quarter RD over Dry Lane Slough?

The structure is 39 ft (11.8 m) long with a longest span of 37 ft (11.4 m) and a deck 27 ft wide.

Who owns Black Quarter RD over Dry Lane Slough?

It is owned by the Town or Township Highway Agency.