US Bridges

US 13 NB over Manokin River

Fair

Somerset County, Maryland · 0.05 Mile North of Md 363 · Structure no. 100000190012011

Built
1958
67 years old, rebuilt 1980
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
86 ft
2 main spans
Daily traffic
22,370
2009 count
Owner
State
State Highway Agency

About this bridge

US 13 NB over Manokin River is a steel stringer/multi-beam or girder carrying US 13 NB over Manokin River in Somerset County, Maryland. It was built in 1958 and reconstructed in 1980, so it is 67 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 22,370 vehicles a day, roughly 8% of them trucks, projected to reach 13,059 by 2026. The structure is 86 ft (26.2 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 13 NB
CrossesManokin River
Location0.05 Mile North of Md 363
RouteU.S. Route 13
Coordinates38.20442, -75.69885
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating37.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length86 ft (26.2 m)
Longest span41 ft (12.5 m)
Deck width51 ft (15.4 m)
Roadway width47 ft (14.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,370 (2009)
Projected traffic13,059 by 2026
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US 13 NB over Manokin River built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1980.

What condition is US 13 NB over Manokin 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 February 2023.

How much traffic does US 13 NB over Manokin River carry?

About 22,370 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is US 13 NB over Manokin River?

The structure is 86 ft (26.2 m) long with a longest span of 41 ft (12.5 m) and a deck 51 ft wide.

Who owns US 13 NB over Manokin River?

It is owned by the State Highway Agency.