US Bridges

Sigma Road over N Fork Powell River

FairPosted for load

Lee County, Virginia · .95 FR R606-.05 to De.End · Structure no. 000000000010831

Built
1958
67 years old, rebuilt 2004
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
69 ft
2 main spans
Daily traffic
50
2018 count
Owner
State
State Highway Agency

About this bridge

Sigma Road over N Fork Powell River is a steel stringer/multi-beam or girder carrying Sigma Road over N Fork Powell River in Lee County, Virginia. It was built in 1958 and reconstructed in 2004, so it is 67 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 57 by 2045. The structure is 69 ft (21 m) long and 14 ft wide.

Location

Open in Google Maps
CarriesSigma Road
CrossesN Fork Powell River
Location.95 FR R606-.05 to De.End
RouteCounty Highway 625
CountyLee County
StateVirginia
Coordinates36.83152, -82.93666
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating18 US tons
Inventory rating11 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 20 + Mod
Structure length69 ft (21 m)
Longest span35 ft (10.7 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2018)
Projected traffic57 by 2045
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$122.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Sigma Road over N Fork Powell River built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2004.

What condition is Sigma Road over N Fork Powell 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 September 2023.

How much traffic does Sigma Road over N Fork Powell River carry?

About 50 vehicles per day (2018 count).

How long is Sigma Road over N Fork Powell River?

The structure is 69 ft (21 m) long with a longest span of 35 ft (10.7 m) and a deck 14 ft wide.

Who owns Sigma Road over N Fork Powell River?

It is owned by the State Highway Agency.