US Bridges

Mid-County Exwy.Nb over Bryn Mawr Avenue

Fair

Delaware County, Pennsylvania · Radnor Township 25H02 · Structure no. 000000000015118

Built
1967
58 years old
Condition
Fair
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
44,192
2024 count
Owner
State
State Highway Agency

About this bridge

Mid-County Exwy.Nb over Bryn Mawr Avenue is a prestressed concrete box beam or girders - multiple carrying Mid-County Exwy.Nb over Bryn Mawr Avenue in Delaware County, Pennsylvania. It was built in 1967, so it is 58 years old, older 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 44,192 vehicles a day, roughly 10% of them trucks, projected to reach 67,047 by 2032. The structure is 66 ft (20.1 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMid-County Exwy.Nb
CrossesBryn Mawr Avenue
LocationRadnor Township 25H02
RouteInterstate 476
CountyDelaware County
StatePennsylvania
Coordinates40.00711, -75.3543
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating28 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length66 ft (20.1 m)
Longest span64 ft (19.5 m)
Deck width55 ft (16.8 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,192 (2024)
Projected traffic67,047 by 2032
Trucks10%
Lanes on structure3
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 Mid-County Exwy.Nb over Bryn Mawr Avenue built?

It was built in 1967, making it 58 years old in 2025.

What condition is Mid-County Exwy.Nb over Bryn Mawr Avenue 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 2024.

How much traffic does Mid-County Exwy.Nb over Bryn Mawr Avenue carry?

About 44,192 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Mid-County Exwy.Nb over Bryn Mawr Avenue?

The structure is 66 ft (20.1 m) long with a longest span of 64 ft (19.5 m) and a deck 55 ft wide.

Who owns Mid-County Exwy.Nb over Bryn Mawr Avenue?

It is owned by the State Highway Agency.