US Bridges

Idylwood Road over Tributary of Pimmit Run

Good

Fairfax County, Virginia · 00.35FR.3958/00.18TO694 · Structure no. 000000000006862

Built
1983
42 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
8,545
2022 count
Owner
State
State Highway Agency

About this bridge

Idylwood Road over Tributary of Pimmit Run is a concrete culvert carrying Idylwood Road over Tributary of Pimmit Run in Fairfax County, Virginia. It was built in 1983, so it is 42 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 8,545 vehicles a day, roughly 1% of them trucks, projected to reach 10,353 by 2045. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesIdylwood Road
CrossesTributary of Pimmit Run
Location00.35FR.3958/00.18TO694
RouteCounty Highway 695
CountyFairfax County
StateVirginia
Coordinates38.9095, -77.18648
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.9 US tons
Inventory rating98 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,545 (2022)
Projected traffic10,353 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$125 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Idylwood Road over Tributary of Pimmit Run built?

It was built in 1983, making it 42 years old in 2025.

What condition is Idylwood Road over Tributary of Pimmit Run 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 2023.

How much traffic does Idylwood Road over Tributary of Pimmit Run carry?

About 8,545 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Idylwood Road over Tributary of Pimmit Run?

The structure is 26 ft (7.9 m) long with a longest span of 9 ft (2.7 m).

Who owns Idylwood Road over Tributary of Pimmit Run?

It is owned by the State Highway Agency.