US Bridges

Thornspring RD/643 over Little Walker Creek

Fair

Pulaski County, Virginia · 0.00-RTE601; 4.50-RTE636 · Structure no. 000000000014574

Built
2005
20 years old
Condition
Fair
inspected October 2023
Type
Culvert
Steel
Length
75 ft
9 main spans
Daily traffic
40
2017 count
Owner
State
State Highway Agency

About this bridge

Thornspring RD/643 over Little Walker Creek is a steel culvert carrying Thornspring RD/643 over Little Walker Creek in Pulaski County, Virginia. It was built in 2005, so it is 20 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 40 vehicles a day, projected to reach 46 by 2045. The structure is 75 ft (22.9 m) long and 34 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesThornspring RD/643
CrossesLittle Walker Creek
Location0.00-RTE601; 4.50-RTE636
RouteCounty Highway 643
CountyPulaski County
StateVirginia
Coordinates37.15957, -80.80471
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating99 US tons
Inventory rating98 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckConcrete, cast-in-place
Main spans9
Design loadUnknown
Structure length75 ft (22.9 m)
Longest span3 ft (0.9 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2017)
Projected traffic46 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 Thornspring RD/643 over Little Walker Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is Thornspring RD/643 over Little Walker 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 2023.

How much traffic does Thornspring RD/643 over Little Walker Creek carry?

About 40 vehicles per day (2017 count).

How long is Thornspring RD/643 over Little Walker Creek?

The structure is 75 ft (22.9 m) long with a longest span of 3 ft (0.9 m) and a deck 34 ft wide.

Who owns Thornspring RD/643 over Little Walker Creek?

It is owned by the State Highway Agency.