US Bridges

Blackwells Hollow over Rocky Bar Branch

Good

Albemarle County, Virginia · 0.68 FR 687 / 0.53 to 601 · Structure no. 000000000000872

Built
1932
93 years old, rebuilt 2022
Condition
Good
inspected January 2024
Type
Slab
Prestressed Concrete
Length
43 ft
1 main span
Daily traffic
258
2022 count
Owner
State
State Highway Agency

About this bridge

Blackwells Hollow over Rocky Bar Branch is a prestressed concrete slab carrying Blackwells Hollow over Rocky Bar Branch in Albemarle County, Virginia. It was built in 1932 and reconstructed in 2022, 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 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 258 vehicles a day, roughly 1% of them trucks, projected to reach 319 by 2042. The structure is 43 ft (13.1 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesBlackwells Hollow
CrossesRocky Bar Branch
Location0.68 FR 687 / 0.53 to 601
RouteCounty Highway 810
Coordinates38.23401, -78.61886
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80 US tons
Inventory rating61.9 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHL 93
Structure length43 ft (13.1 m)
Longest span43 ft (13.1 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic258 (2022)
Projected traffic319 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$190 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackwells Hollow over Rocky Bar Branch built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 2022.

What condition is Blackwells Hollow over Rocky Bar 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 January 2024.

How much traffic does Blackwells Hollow over Rocky Bar Branch carry?

About 258 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Blackwells Hollow over Rocky Bar Branch?

The structure is 43 ft (13.1 m) long with a longest span of 43 ft (13.1 m) and a deck 24 ft wide.

Who owns Blackwells Hollow over Rocky Bar Branch?

It is owned by the State Highway Agency.