US Bridges

Spec Mine Rd. 764 over Branch of Back Creek

FairPosted for load

Botetourt County, Virginia · 0.05-RTE763; 0.03-END Mt · Structure no. 000000000003520

Built
1987
38 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
55
2019 count
Owner
State
State Highway Agency

About this bridge

Spec Mine Rd. 764 over Branch of Back Creek is a steel stringer/multi-beam or girder carrying Spec Mine Rd. 764 over Branch of Back Creek in Botetourt County, Virginia. It was built in 1987, so it is 38 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. Its operating status is: posted for load restriction.

It carries about 55 vehicles a day, projected to reach 80 by 2045. The structure is 29 ft (8.8 m) long and 19 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesSpec Mine Rd. 764
CrossesBranch of Back Creek
Location0.05-RTE763; 0.03-END Mt
RouteCounty Highway 764
CountyBotetourt County
StateVirginia
Coordinates37.45734, -79.76806
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span26 ft (7.9 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2019)
Projected traffic80 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$138.9 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Spec Mine Rd. 764 over Branch of Back Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Spec Mine Rd. 764 over Branch of Back 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 Spec Mine Rd. 764 over Branch of Back Creek carry?

About 55 vehicles per day (2019 count).

How long is Spec Mine Rd. 764 over Branch of Back Creek?

The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 19 ft wide.

Who owns Spec Mine Rd. 764 over Branch of Back Creek?

It is owned by the State Highway Agency.