US Bridges

Seminary RD Ramp B over Shirley Mem.Hwy;rte 395

Fair

Fairfax County, Virginia · 01.70FR402/00.30TONBEAU · Structure no. 000000000019948

Built
1970
55 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
200 ft
3 main spans
Daily traffic
8,000
1988 count
Owner
State
State Highway Agency

About this bridge

Seminary RD Ramp B over Shirley Mem.Hwy;rte 395 is a steel stringer/multi-beam or girder carrying Seminary RD Ramp B over Shirley Mem.Hwy;rte 395 in Fairfax County, Virginia. It was built in 1970, so it is 55 years old, older than the Virginia average of 50.7 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 8,000 vehicles a day, roughly 3% of them trucks, projected to reach 32,000 by 2042. The structure is 200 ft (61 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSeminary RD Ramp B
CrossesShirley Mem.Hwy;rte 395
Location01.70FR402/00.30TONBEAU
RouteInterstate 420
CountyFairfax County
StateVirginia
Coordinates38.83002, -77.11415
Functional classUrban Principal Arterial - Interstate

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.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating69.8 US tons
Inventory rating53.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length200 ft (61 m)
Longest span75 ft (22.9 m)
Deck width43 ft (13.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic8,000 (1988)
Projected traffic32,000 by 2042
Trucks3%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$210 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Seminary RD Ramp B over Shirley Mem.Hwy;rte 395 built?

It was built in 1970, making it 55 years old in 2025.

What condition is Seminary RD Ramp B over Shirley Mem.Hwy;rte 395 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 October 2024.

How much traffic does Seminary RD Ramp B over Shirley Mem.Hwy;rte 395 carry?

About 8,000 vehicles per day (1988 count), of which roughly 3% are trucks.

How long is Seminary RD Ramp B over Shirley Mem.Hwy;rte 395?

The structure is 200 ft (61 m) long with a longest span of 75 ft (22.9 m) and a deck 43 ft wide.

Who owns Seminary RD Ramp B over Shirley Mem.Hwy;rte 395?

It is owned by the State Highway Agency.