US Bridges

THRNSPRGCHRCHRD639 over Thornspring Branch

Good

Pulaski County, Virginia · 0.10-RTE643; 1.30-RTE636 · Structure no. 000000000025428

Built
1997
28 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
1,198
2017 count
Owner
State
State Highway Agency

About this bridge

THRNSPRGCHRCHRD639 over Thornspring Branch is a concrete culvert carrying THRNSPRGCHRCHRD639 over Thornspring Branch in Pulaski County, Virginia. It was built in 1997, so it is 28 years old, younger than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,198 vehicles a day, projected to reach 1,869 by 2042. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTHRNSPRGCHRCHRD639
CrossesThornspring Branch
Location0.10-RTE643; 1.30-RTE636
RouteCounty Highway 639
CountyPulaski County
StateVirginia
Coordinates37.10443, -80.75893
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating57 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,198 (2017)
Projected traffic1,869 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 THRNSPRGCHRCHRD639 over Thornspring Branch built?

It was built in 1997, making it 28 years old in 2025.

What condition is THRNSPRGCHRCHRD639 over Thornspring Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does THRNSPRGCHRCHRD639 over Thornspring Branch carry?

About 1,198 vehicles per day (2017 count).

How long is THRNSPRGCHRCHRD639 over Thornspring Branch?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m).

Who owns THRNSPRGCHRCHRD639 over Thornspring Branch?

It is owned by the State Highway Agency.