US Bridges

Tripleseven Road over Trib.Of Potomac River

Good

Loudoun County, Virginia · 00.25FR1660/00.15TO1795 · Structure no. 000000000025250

Built
1997
28 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
32 ft
4 main spans
Daily traffic
4,581
2022 count
Owner
State
State Highway Agency

About this bridge

Tripleseven Road over Trib.Of Potomac River is a concrete culvert carrying Tripleseven Road over Trib.Of Potomac River in Loudoun County, Virginia. It was built in 1997, so it is 28 years old, younger 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 4,581 vehicles a day, projected to reach 4,636 by 2042. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesTripleseven Road
CrossesTrib.Of Potomac River
Location00.25FR1660/00.15TO1795
RouteCounty Highway 777
Coordinates39.03619, -77.40734
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20 + Mod
Structure length32 ft (9.8 m)
Longest span5 ft (1.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,581 (2022)
Projected traffic4,636 by 2042
Trucks0%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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
NavigationNo navigation control on waterway

Frequently asked questions

When was Tripleseven Road over Trib.Of Potomac River built?

It was built in 1997, making it 28 years old in 2025.

What condition is Tripleseven Road over Trib.Of Potomac River 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 Tripleseven Road over Trib.Of Potomac River carry?

About 4,581 vehicles per day (2022 count).

How long is Tripleseven Road over Trib.Of Potomac River?

The structure is 32 ft (9.8 m) long with a longest span of 5 ft (1.5 m).

Who owns Tripleseven Road over Trib.Of Potomac River?

It is owned by the State Highway Agency.