US Bridges

Tranquility Ln. over M Fork Holston River

Fair

Smyth County, Virginia · 0.0 FR 11; 0.9TO End Main · Structure no. 000000000017700

Built
1978
47 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
77 ft
1 main span
Daily traffic
75
2022 count
Owner
State
State Highway Agency

About this bridge

Tranquility Ln. over M Fork Holston River is a steel stringer/multi-beam or girder carrying Tranquility Ln. over M Fork Holston River in Smyth County, Virginia. It was built in 1978, so it is 47 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 75 vehicles a day, projected to reach 76 by 2045. The structure is 77 ft (23.5 m) long and 30 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

Open in Google Maps
CarriesTranquility Ln.
CrossesM Fork Holston River
Location0.0 FR 11; 0.9TO End Main
RouteCounty Highway 714
CountySmyth County
StateVirginia
Coordinates36.85321, -81.47818
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating55 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length77 ft (23.5 m)
Longest span72 ft (21.8 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic76 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 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 Tranquility Ln. over M Fork Holston River built?

It was built in 1978, making it 47 years old in 2025.

What condition is Tranquility Ln. over M Fork Holston River 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 January 2025.

How much traffic does Tranquility Ln. over M Fork Holston River carry?

About 75 vehicles per day (2022 count).

How long is Tranquility Ln. over M Fork Holston River?

The structure is 77 ft (23.5 m) long with a longest span of 72 ft (21.8 m) and a deck 30 ft wide.

Who owns Tranquility Ln. over M Fork Holston River?

It is owned by the State Highway Agency.