US Bridges

Mid-County Exwy.Sb over Crum Ck;black Rock Park

Fair

Delaware County, Pennsylvania · Black Rock Park 34H11 · Structure no. 000000000015030

Built
1988
37 years old
Condition
Fair
inspected June 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
525 ft
4 main spans
Daily traffic
41,997
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy.Sb over Crum Ck;black Rock Park is a steel continuous stringer/multi-beam or girder carrying Mid-County Exwy.Sb over Crum Ck;black Rock Park in Delaware County, Pennsylvania. It was built in 1988, so it is 37 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 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 41,997 vehicles a day, roughly 9% of them trucks, projected to reach 57,931 by 2032. The structure is 525 ft (160 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMid-County Exwy.Sb
CrossesCrum Ck;black Rock Park
LocationBlack Rock Park 34H11
RouteInterstate 476
Coordinates39.88424, -75.35323
Functional classUrban Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length525 ft (160 m)
Longest span139 ft (42.4 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,997 (2024)
Projected traffic57,931 by 2032
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mid-County Exwy.Sb over Crum Ck;black Rock Park built?

It was built in 1988, making it 37 years old in 2025.

What condition is Mid-County Exwy.Sb over Crum Ck;black Rock Park 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 June 2022.

How much traffic does Mid-County Exwy.Sb over Crum Ck;black Rock Park carry?

About 41,997 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Mid-County Exwy.Sb over Crum Ck;black Rock Park?

The structure is 525 ft (160 m) long with a longest span of 139 ft (42.4 m) and a deck 48 ft wide.

Who owns Mid-County Exwy.Sb over Crum Ck;black Rock Park?

It is owned by the State Highway Agency.