US Bridges

Spring Valley Rd. over Knob Fork Creek

Fair

Grayson County, Virginia · 0.0 FR 891; 0.55 to 604 · Structure no. 000000000008946

Built
1932
93 years old, rebuilt 2009
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
214
2022 count
Owner
State
State Highway Agency

About this bridge

Spring Valley Rd. over Knob Fork Creek is a steel stringer/multi-beam or girder carrying Spring Valley Rd. over Knob Fork Creek in Grayson County, Virginia. It was built in 1932 and reconstructed in 2009, so it is 93 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 214 vehicles a day, projected to reach 239 by 2042. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesSpring Valley Rd.
CrossesKnob Fork Creek
Location0.0 FR 891; 0.55 to 604
RouteCounty Highway 805
CountyGrayson County
StateVirginia
Coordinates36.74232, -81.09518
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.1 US tons
Inventory rating36.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic214 (2022)
Projected traffic239 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$113.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Spring Valley Rd. over Knob Fork Creek built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2009.

What condition is Spring Valley Rd. over Knob Fork Creek 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 October 2024.

How much traffic does Spring Valley Rd. over Knob Fork Creek carry?

About 214 vehicles per day (2022 count).

How long is Spring Valley Rd. over Knob Fork Creek?

The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Spring Valley Rd. over Knob Fork Creek?

It is owned by the State Highway Agency.