US Bridges

Spring Valley Rd. over Knob Fork Branch

Fair

Grayson County, Virginia · At R654 & .8 to R604 · Structure no. 000000000008944

Built
1974
51 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
59 ft
4 main spans
Daily traffic
250
2022 count
Owner
State
State Highway Agency

About this bridge

Spring Valley Rd. over Knob Fork Branch is a concrete culvert carrying Spring Valley Rd. over Knob Fork Branch in Grayson County, Virginia. It was built in 1974, so it is 51 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.

It carries about 250 vehicles a day, projected to reach 279 by 2042. The structure is 59 ft (18 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSpring Valley Rd.
CrossesKnob Fork Branch
LocationAt R654 & .8 to R604
RouteCounty Highway 805
CountyGrayson County
StateVirginia
Coordinates36.72942, -81.08468
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length59 ft (18 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic279 by 2042
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 Spring Valley Rd. over Knob Fork Branch built?

It was built in 1974, making it 51 years old in 2025.

What condition is Spring Valley Rd. over Knob Fork Branch 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 Branch carry?

About 250 vehicles per day (2022 count).

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

The structure is 59 ft (18 m) long with a longest span of 14 ft (4.3 m).

Who owns Spring Valley Rd. over Knob Fork Branch?

It is owned by the State Highway Agency.