US Bridges

Md 124 over Whetstone Run

Fair

Montgomery County, Maryland · 0.447 M S of Midcounty · Structure no. 100000150166030

Built
1986
39 years old, rebuilt 1990
Condition
Fair
inspected March 2024
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
77 ft
4 main spans
Daily traffic
23,621
2013 count
Owner
State
State Highway Agency

About this bridge

Md 124 over Whetstone Run is a aluminum, wrought iron, or cast iron culvert carrying Md 124 over Whetstone Run in Montgomery County, Maryland. It was built in 1986 and reconstructed in 1990, so it is 39 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 5 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 23,621 vehicles a day, projected to reach 26,957 by 2026. The structure is 77 ft (23.5 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMd 124
CrossesWhetstone Run
Location0.447 M S of Midcounty
RouteState Highway 124
CountyMontgomery County
StateMaryland
Coordinates39.15486, -77.18071
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans4
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,621 (2013)
Projected traffic26,957 by 2026
Trucks—
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Md 124 over Whetstone Run built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 1990.

What condition is Md 124 over Whetstone 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 March 2024.

How much traffic does Md 124 over Whetstone Run carry?

About 23,621 vehicles per day (2013 count).

How long is Md 124 over Whetstone Run?

The structure is 77 ft (23.5 m) long with a longest span of 10 ft (3 m).

Who owns Md 124 over Whetstone Run?

It is owned by the State Highway Agency.