US Bridges

Md 956 over Potomac River

Fair

Allegany County, Maryland · On West Virginia Line · Structure no. 100000010098010

Built
1967
58 years old, rebuilt 2016
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
482 ft
6 main spans
Daily traffic
7,150
2013 count
Owner
State
State Highway Agency

About this bridge

Md 956 over Potomac River is a steel stringer/multi-beam or girder carrying Md 956 over Potomac River in Allegany County, Maryland. It was built in 1967 and reconstructed in 2016, so it is 58 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 7,150 vehicles a day, roughly 5% of them trucks, projected to reach 8,725 by 2033. The structure is 482 ft (146.9 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMd 956
CrossesPotomac River
LocationOn West Virginia Line
RouteState Highway 956
Coordinates39.56209, -78.84747
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating42.9 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length482 ft (146.9 m)
Longest span79 ft (24.1 m)
Deck width37 ft (11.3 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,150 (2013)
Projected traffic8,725 by 2033
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 956 over Potomac River built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2016.

What condition is Md 956 over Potomac River 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 June 2024.

How much traffic does Md 956 over Potomac River carry?

About 7,150 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Md 956 over Potomac River?

The structure is 482 ft (146.9 m) long with a longest span of 79 ft (24.1 m) and a deck 37 ft wide.

Who owns Md 956 over Potomac River?

It is owned by the State Highway Agency.