US Bridges

Black Rock Road over Tracks Removed

Fair

Montgomery County, Pennsylvania · Near Audubon 27D04/3253H9 · Structure no. 000000000027778

Built
1976
49 years old
Condition
Fair
inspected February 2023
Type
Slab
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
8,071
2024 count
Owner
State
State Highway Agency

About this bridge

Black Rock Road over Tracks Removed is a prestressed concrete slab carrying Black Rock Road over Tracks Removed in Montgomery County, Pennsylvania. It was built in 1976, so it is 49 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 8,071 vehicles a day, roughly 3% of them trucks, projected to reach 8,787 by 2032. The structure is 31 ft (9.4 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesBlack Rock Road
CrossesTracks Removed
LocationNear Audubon 27D04/3253H9
RouteState Highway 0
CountyMontgomery County
StatePennsylvania
Coordinates40.13662, -75.45131
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating95 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width38 ft (11.6 m)
Roadway width34 ft (10.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,071 (2024)
Projected traffic8,787 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed1.9 mi (3 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Black Rock Road over Tracks Removed built?

It was built in 1976, making it 49 years old in 2025.

What condition is Black Rock Road over Tracks Removed 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 February 2023.

How much traffic does Black Rock Road over Tracks Removed carry?

About 8,071 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Black Rock Road over Tracks Removed?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 38 ft wide.

Who owns Black Rock Road over Tracks Removed?

It is owned by the State Highway Agency.