US Bridges

Black Valley Road over Flintstone Creek

Fair

Allegany County, Maryland · 0.02 MI E of Dolly RD · Structure no. 200000A-0103040

Built
1964
61 years old
Condition
Fair
inspected October 2023
Type
Frame
Concrete Continuous
Length
66 ft
2 main spans
Daily traffic
499
2019 count
Owner
County
County Highway Agency

About this bridge

Black Valley Road over Flintstone Creek is a concrete continuous frame carrying Black Valley Road over Flintstone Creek in Allegany County, Maryland. It was built in 1964, so it is 61 years old, older than the Maryland average of 52.6 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 499 vehicles a day, roughly 10% of them trucks, projected to reach 621 by 2041. The structure is 66 ft (20.1 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesBlack Valley Road
CrossesFlintstone Creek
Location0.02 MI E of Dolly RD
RouteCounty Highway 740
CountyAllegany County
StateMaryland
Coordinates39.70769, -78.56659
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58 US tons
Inventory rating34.9 US tons

Structure

Structure typeFrame
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length66 ft (20.1 m)
Longest span32 ft (9.8 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic499 (2019)
Projected traffic621 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$11,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Black Valley Road over Flintstone Creek built?

It was built in 1964, making it 61 years old in 2025.

What condition is Black Valley Road over Flintstone 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 Black Valley Road over Flintstone Creek carry?

About 499 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Black Valley Road over Flintstone Creek?

The structure is 66 ft (20.1 m) long with a longest span of 32 ft (9.8 m) and a deck 29 ft wide.

Who owns Black Valley Road over Flintstone Creek?

It is owned by the County Highway Agency.