US Bridges

John S. Mosby Hwy. over Little River

Fair

Loudoun County, Virginia · 0.35 FR 631 & 0.06 to 612 · Structure no. 000000000011117

Built
1824
201 years old, rebuilt 2001
Condition
Fair
inspected October 2023
Type
Arch - Deck
Masonry
Length
108 ft
2 main spans
Daily traffic
9,058
2022 count
Owner
State
State Highway Agency

About this bridge

John S. Mosby Hwy. over Little River is a masonry arch - deck carrying John S. Mosby Hwy. over Little River in Loudoun County, Virginia. It was built in 1824 and reconstructed in 2001, so it is 201 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 9,058 vehicles a day, projected to reach 10,100 by 2045. The structure is 108 ft (32.9 m) long and 23 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesJohn S. Mosby Hwy.
CrossesLittle River
Location0.35 FR 631 & 0.06 to 612
RouteU.S. Route 50
CountyLoudoun County
StateVirginia
Coordinates38.97525, -77.63964
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating53.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckOther
Main spans2
Design loadHS 20
Structure length108 ft (32.9 m)
Longest span31 ft (9.4 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,058 (2022)
Projected traffic10,100 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$70 million
NavigationNo navigation control on waterway

Frequently asked questions

When was John S. Mosby Hwy. over Little River built?

It was built in 1824, making it 201 years old in 2025. It was reconstructed in 2001.

What condition is John S. Mosby Hwy. over Little 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 October 2023.

How much traffic does John S. Mosby Hwy. over Little River carry?

About 9,058 vehicles per day (2022 count).

How long is John S. Mosby Hwy. over Little River?

The structure is 108 ft (32.9 m) long with a longest span of 31 ft (9.4 m) and a deck 23 ft wide.

Who owns John S. Mosby Hwy. over Little River?

It is owned by the State Highway Agency.