US Bridges

Is 70 EB over Black Rock RD

Good

Washington County, Maryland · 0.78 Mile East of Md 66 · Structure no. 100000210134013

Built
2009
16 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
119 ft
3 main spans
Daily traffic
58,600
2009 count
Owner
State
State Highway Agency

About this bridge

Is 70 EB over Black Rock RD is a steel continuous stringer/multi-beam or girder carrying Is 70 EB over Black Rock RD in Washington County, Maryland. It was built in 2009, so it is 16 years old, younger than the Maryland average of 52.6 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 58,600 vehicles a day, roughly 8% of them trucks, projected to reach 46,500 by 2027. The structure is 119 ft (36.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 70 EB
CrossesBlack Rock RD
Location0.78 Mile East of Md 66
RouteInterstate 70
Coordinates39.57865, -77.62918
Functional classRural Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107.1 US tons
Inventory rating98.2 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length119 ft (36.3 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,600 (2009)
Projected traffic46,500 by 2027
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Is 70 EB over Black Rock RD built?

It was built in 2009, making it 16 years old in 2025.

What condition is Is 70 EB over Black Rock RD 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 August 2023.

How much traffic does Is 70 EB over Black Rock RD carry?

About 58,600 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is Is 70 EB over Black Rock RD?

The structure is 119 ft (36.3 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns Is 70 EB over Black Rock RD?

It is owned by the State Highway Agency.