US Bridges

Md 124 over Great Seneca Creek

Fair

Montgomery County, Maryland · 0.23 MI S of Watkins RD · Structure no. 100000150022020

Built
1989
36 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
43 ft
Daily traffic
11,881
2013 count
Owner
State
State Highway Agency

About this bridge

Md 124 over Great Seneca Creek is a concrete culvert carrying Md 124 over Great Seneca Creek in Montgomery County, Maryland. It was built in 1989, so it is 36 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 11,881 vehicles a day, roughly 8% of them trucks, projected to reach 15,289 by 2026. The structure is 43 ft (13 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMd 124
CrossesGreat Seneca Creek
Location0.23 MI S of Watkins RD
RouteState Highway 124
CountyMontgomery County
StateMaryland
Coordinates39.23562, -77.18065
Functional classUrban Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
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 rating90.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans0
Design loadHS 20
Structure length43 ft (13 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,881 (2013)
Projected traffic15,289 by 2026
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Md 124 over Great Seneca Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is Md 124 over Great Seneca Creek 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 Great Seneca Creek carry?

About 11,881 vehicles per day (2013 count), of which roughly 8% are trucks.

How long is Md 124 over Great Seneca Creek?

The structure is 43 ft (13 m) long with a longest span of 14 ft (4.3 m).

Who owns Md 124 over Great Seneca Creek?

It is owned by the State Highway Agency.