US Bridges

Mt Jackson RD over I-81

Fair

Shenandoah County, Virginia · 0.12 to 1318 - 0.30 to 11 · Structure no. 000000000017084

Built
1966
59 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
386 ft
6 main spans
Daily traffic
11,270
2022 count
Owner
State
State Highway Agency

About this bridge

Mt Jackson RD over I-81 is a prestressed concrete stringer/multi-beam or girder carrying Mt Jackson RD over I-81 in Shenandoah County, Virginia. It was built in 1966, so it is 59 years old, older 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 11,270 vehicles a day, roughly 1% of them trucks, projected to reach 14,170 by 2042. The structure is 386 ft (117.7 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMt Jackson RD
CrossesI-81
Location0.12 to 1318 - 0.30 to 11
RouteState Highway 292
CountyShenandoah County
StateVirginia
Coordinates38.76254, -78.63458
Functional classRural Major 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length386 ft (117.7 m)
Longest span69 ft (20.9 m)
Deck width35 ft (10.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,270 (2022)
Projected traffic14,170 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.2 mi (10 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$477 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mt Jackson RD over I-81 built?

It was built in 1966, making it 59 years old in 2025.

What condition is Mt Jackson RD over I-81 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 September 2024.

How much traffic does Mt Jackson RD over I-81 carry?

About 11,270 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Mt Jackson RD over I-81?

The structure is 386 ft (117.7 m) long with a longest span of 69 ft (20.9 m) and a deck 35 ft wide.

Who owns Mt Jackson RD over I-81?

It is owned by the State Highway Agency.