US Bridges

Seminary Road over I-395

Good

Alexandria city, Virginia · 01.20FR7/00.03TO401 · Structure no. 000000000019902

Built
1970
55 years old, rebuilt 2016
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
520 ft
5 main spans
Daily traffic
14,456
2022 count
Owner
State
State Highway Agency

About this bridge

Seminary Road over I-395 is a steel stringer/multi-beam or girder carrying Seminary Road over I-395 in Alexandria city, Virginia. It was built in 1970 and reconstructed in 2016, 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,456 vehicles a day, roughly 1% of them trucks, projected to reach 16,118 by 2042. The structure is 520 ft (158.5 m) long and 70 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSeminary Road
CrossesI-395
Location01.20FR7/00.03TO401
RouteState Highway 420
CountyAlexandria city
StateVirginia
Coordinates38.83043, -77.11382
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86.8 US tons
Inventory rating66.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length520 ft (158.5 m)
Longest span126 ft (38.4 m)
Deck width70 ft (21.3 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic14,456 (2022)
Projected traffic16,118 by 2042
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesThird level (interchange)
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Seminary Road over I-395 built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2016.

What condition is Seminary Road over I-395 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does Seminary Road over I-395 carry?

About 14,456 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Seminary Road over I-395?

The structure is 520 ft (158.5 m) long with a longest span of 126 ft (38.4 m) and a deck 70 ft wide.

Who owns Seminary Road over I-395?

It is owned by the State Highway Agency.