US Bridges

County Line Road over Mid-County Expressway

Fair

Delaware County, Pennsylvania · Radnor;lower Meri. 14J07 · Structure no. 000000000027459

Built
1974
51 years old
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
226 ft
2 main spans
Daily traffic
6,582
2024 count
Owner
State
State Highway Agency

About this bridge

County Line Road over Mid-County Expressway is a prestressed concrete stringer/multi-beam or girder carrying County Line Road over Mid-County Expressway in Delaware County, Pennsylvania. It was built in 1974, so it is 51 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 6,582 vehicles a day, roughly 4% of them trucks, projected to reach 7,392 by 2032. The structure is 226 ft (68.9 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Line Road
CrossesMid-County Expressway
LocationRadnor;lower Meri. 14J07
RouteState Highway 0
CountyDelaware County
StatePennsylvania
Coordinates40.04944, -75.34672
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
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 alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length226 ft (68.9 m)
Longest span108 ft (32.9 m)
Deck width40 ft (12.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,582 (2024)
Projected traffic7,392 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$307,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Line Road over Mid-County Expressway built?

It was built in 1974, making it 51 years old in 2025.

What condition is County Line Road over Mid-County Expressway 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 November 2022.

How much traffic does County Line Road over Mid-County Expressway carry?

About 6,582 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is County Line Road over Mid-County Expressway?

The structure is 226 ft (68.9 m) long with a longest span of 108 ft (32.9 m) and a deck 40 ft wide.

Who owns County Line Road over Mid-County Expressway?

It is owned by the State Highway Agency.