US Bridges

Diaah & Dtr over Rocky Run Tributary

Fair

Fairfax County, Virginia · 11.8 Miles from Dulles Ai · Structure no. 2100057P0000000

Built
1984
41 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
22,000
2024 count
Owner
Federal
Metropolitan Washington Airports Service

About this bridge

Diaah & Dtr over Rocky Run Tributary is a concrete culvert carrying Diaah & Dtr over Rocky Run Tributary in Fairfax County, Virginia. It was built in 1984, so it is 41 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 22,000 vehicles a day, projected to reach 26,400 by 2044. The structure is 29 ft (8.8 m) long.

Location

Open in Google Maps
CarriesDiaah & Dtr
CrossesRocky Run Tributary
Location11.8 Miles from Dulles Ai
RouteState Highway 267
CountyFairfax County
StateVirginia
Coordinates38.93437, -77.24146
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating95 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length29 ft (8.8 m)
Longest span14 ft (4.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,000 (2024)
Projected traffic26,400 by 2044
Trucks—
Lanes on structure14
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerMetropolitan Washington Airports Service
Maintained byMetropolitan Washington Airports Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$33,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Diaah & Dtr over Rocky Run Tributary built?

It was built in 1984, making it 41 years old in 2025.

What condition is Diaah & Dtr over Rocky Run Tributary 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 February 2024.

How much traffic does Diaah & Dtr over Rocky Run Tributary carry?

About 22,000 vehicles per day (2024 count).

How long is Diaah & Dtr over Rocky Run Tributary?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.4 m).

Who owns Diaah & Dtr over Rocky Run Tributary?

It is owned by the Metropolitan Washington Airports Service.