US Bridges

Md 242 over Locust Run

Fair

St. Mary's County, Maryland · 1.62 Miles South of Md 5 · Structure no. 100000180019010

Built
1929
96 years old, rebuilt 1950
Condition
Fair
inspected March 2023
Type
Arch - Deck
Concrete
Length
47 ft
1 main span
Daily traffic
2,371
2009 count
Owner
State
State Highway Agency

About this bridge

Md 242 over Locust Run is a concrete arch - deck carrying Md 242 over Locust Run in St. Mary's County, Maryland. It was built in 1929 and reconstructed in 1950, so it is 96 years old, older 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 2,371 vehicles a day, roughly 8% of them trucks, projected to reach 2,595 by 2026. The structure is 47 ft (14.3 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMd 242
CrossesLocust Run
Location1.62 Miles South of Md 5
RouteState Highway 242
CountySt. Mary's County
StateMaryland
Coordinates38.3556, -76.70983
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating84 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length47 ft (14.3 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,371 (2009)
Projected traffic2,595 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 242 over Locust Run built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1950.

What condition is Md 242 over Locust 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 2023.

How much traffic does Md 242 over Locust Run carry?

About 2,371 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 242 over Locust Run?

The structure is 47 ft (14.3 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns Md 242 over Locust Run?

It is owned by the State Highway Agency.