US Bridges

Md 6 over Locks Swamp Creek

Fair

St. Mary's County, Maryland · 0.1 M W of Laurel View LN · Structure no. 100000180012010

Built
1930
95 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
1,951
2009 count
Owner
State
State Highway Agency

About this bridge

Md 6 over Locks Swamp Creek is a concrete slab carrying Md 6 over Locks Swamp Creek in St. Mary's County, Maryland. It was built in 1930, so it is 95 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 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 1,951 vehicles a day, roughly 8% of them trucks, projected to reach 2,261 by 2026. The structure is 23 ft (7 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMd 6
CrossesLocks Swamp Creek
Location0.1 M W of Laurel View LN
RouteState Highway 6
CountySt. Mary's County
StateMaryland
Coordinates38.46375, -76.71353
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,951 (2009)
Projected traffic2,261 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$46,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Md 6 over Locks Swamp Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Md 6 over Locks Swamp 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 December 2023.

How much traffic does Md 6 over Locks Swamp Creek carry?

About 1,951 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Md 6 over Locks Swamp Creek?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 31 ft wide.

Who owns Md 6 over Locks Swamp Creek?

It is owned by the State Highway Agency.