US Bridges

Walney Rd. over Flatlick Branch

Good

Fairfax County, Virginia · 0.90FR662 / 0.98TO50 · Structure no. 000000000029031

Built
2015
10 years old
Condition
Good
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
15,273
2022 count
Owner
State
State Highway Agency

About this bridge

Walney Rd. over Flatlick Branch is a prestressed concrete box beam or girders - multiple carrying Walney Rd. over Flatlick Branch in Fairfax County, Virginia. It was built in 2015, so it is 10 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 15,273 vehicles a day, roughly 1% of them trucks, projected to reach 18,245 by 2045. The structure is 85 ft (25.9 m) long and 78 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWalney Rd.
CrossesFlatlick Branch
Location0.90FR662 / 0.98TO50
RouteCounty Highway 657
Coordinates38.88155, -77.43814
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating87 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span77 ft (23.4 m)
Deck width78 ft (23.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,273 (2022)
Projected traffic18,245 by 2045
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Walney Rd. over Flatlick Branch built?

It was built in 2015, making it 10 years old in 2025.

What condition is Walney Rd. over Flatlick Branch 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 August 2023.

How much traffic does Walney Rd. over Flatlick Branch carry?

About 15,273 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Walney Rd. over Flatlick Branch?

The structure is 85 ft (25.9 m) long with a longest span of 77 ft (23.4 m) and a deck 78 ft wide.

Who owns Walney Rd. over Flatlick Branch?

It is owned by the State Highway Agency.