US Bridges

Stoney Run Drive over Warehouse Run

Fair

St. Mary's County, Maryland · 1 MI W of Flat Iron Road · Structure no. 200000SM0070030

Built
1995
30 years old
Condition
Fair
inspected May 2023
Type
Culvert
Steel
Length
20 ft
Daily traffic
478
2023 count
Owner
County
County Highway Agency

About this bridge

Stoney Run Drive over Warehouse Run is a steel culvert carrying Stoney Run Drive over Warehouse Run in St. Mary's County, Maryland. It was built in 1995, so it is 30 years old, younger than the Maryland average of 52.6 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 478 vehicles a day, roughly 6% of them trucks, projected to reach 584 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesStoney Run Drive
CrossesWarehouse Run
Location1 MI W of Flat Iron Road
RouteCounty Highway 0
CountySt. Mary's County
StateMaryland
Coordinates38.26312, -76.49908
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans0
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic478 (2023)
Projected traffic584 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Stoney Run Drive over Warehouse Run built?

It was built in 1995, making it 30 years old in 2025.

What condition is Stoney Run Drive over Warehouse Run 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 May 2023.

How much traffic does Stoney Run Drive over Warehouse Run carry?

About 478 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Stoney Run Drive over Warehouse Run?

The structure is 20 ft (6.1 m) long with a longest span of 8 ft (2.4 m).

Who owns Stoney Run Drive over Warehouse Run?

It is owned by the County Highway Agency.