US Bridges

North Merrimac RD over Mountain Run

Good

Culpeper County, Virginia · 1.80 FROM641 & .47 to 633 · Structure no. 000000000024774

Built
1994
31 years old, rebuilt 2008
Condition
Good
inspected January 2025
Type
Culvert
Steel
Length
28 ft
3 main spans
Daily traffic
501
2014 count
Owner
State
State Highway Agency

About this bridge

North Merrimac RD over Mountain Run is a steel culvert carrying North Merrimac RD over Mountain Run in Culpeper County, Virginia. It was built in 1994 and reconstructed in 2008, so it is 31 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 501 vehicles a day, projected to reach 579 by 2045. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 5 mi (8 km).

CarriesNorth Merrimac RD
CrossesMountain Run
Location1.80 FROM641 & .47 to 633
RouteCounty Highway 643
Coordinates38.47599, -78.08902
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic501 (2014)
Projected traffic579 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 North Merrimac RD over Mountain Run built?

It was built in 1994, making it 31 years old in 2025. It was reconstructed in 2008.

What condition is North Merrimac RD over Mountain 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 January 2025.

How much traffic does North Merrimac RD over Mountain Run carry?

About 501 vehicles per day (2014 count).

How long is North Merrimac RD over Mountain Run?

The structure is 28 ft (8.5 m) long with a longest span of 8 ft (2.4 m).

Who owns North Merrimac RD over Mountain Run?

It is owned by the State Highway Agency.