US Bridges

Thorncliff Lane over Middle Run

Fair

Fairfax County, Virginia · 00.08FR1583/00.22TO0000 · Structure no. 000000000023789

Built
1990
35 years old
Condition
Fair
inspected June 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
2,224
2001 count
Owner
State
State Highway Agency

About this bridge

Thorncliff Lane over Middle Run is a concrete culvert carrying Thorncliff Lane over Middle Run in Fairfax County, Virginia. It was built in 1990, so it is 35 years old, younger 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 6 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 2,224 vehicles a day, projected to reach 2,713 by 2042. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesThorncliff Lane
CrossesMiddle Run
Location00.08FR1583/00.22TO0000
RouteCounty Highway 7516
CountyFairfax County
StateVirginia
Coordinates38.75281, -77.24747
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating86 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,224 (2001)
Projected traffic2,713 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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$55 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Thorncliff Lane over Middle Run built?

It was built in 1990, making it 35 years old in 2025.

What condition is Thorncliff Lane over Middle Run 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 June 2024.

How much traffic does Thorncliff Lane over Middle Run carry?

About 2,224 vehicles per day (2001 count).

How long is Thorncliff Lane over Middle Run?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns Thorncliff Lane over Middle Run?

It is owned by the State Highway Agency.