US Bridges

Hirst Road over South Fork Catoctin Ck.

Fair

Loudoun County, Virginia · 00.55FR611/00.40TO722 · Structure no. 000000000011011

Built
1987
38 years old
Condition
Fair
inspected March 2024
Type
Slab
Prestressed Concrete
Length
105 ft
3 main spans
Daily traffic
9,753
2022 count
Owner
State
State Highway Agency

About this bridge

Hirst Road over South Fork Catoctin Ck. is a prestressed concrete slab carrying Hirst Road over South Fork Catoctin Ck. in Loudoun County, Virginia. It was built in 1987, so it is 38 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 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 9,753 vehicles a day, roughly 1% of them trucks, projected to reach 10,875 by 2042. The structure is 105 ft (32 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHirst Road
CrossesSouth Fork Catoctin Ck.
Location00.55FR611/00.40TO722
CountyLoudoun County
StateVirginia
Coordinates39.14434, -77.70511
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.7 US tons
Inventory rating56.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length105 ft (32 m)
Longest span35 ft (10.7 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,753 (2022)
Projected traffic10,875 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Hirst Road over South Fork Catoctin Ck. built?

It was built in 1987, making it 38 years old in 2025.

What condition is Hirst Road over South Fork Catoctin Ck. 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 March 2024.

How much traffic does Hirst Road over South Fork Catoctin Ck. carry?

About 9,753 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Hirst Road over South Fork Catoctin Ck.?

The structure is 105 ft (32 m) long with a longest span of 35 ft (10.7 m) and a deck 36 ft wide.

Who owns Hirst Road over South Fork Catoctin Ck.?

It is owned by the State Highway Agency.