US Bridges

Lansdowne Avenue over Naylors Run

Fair

Delaware County, Pennsylvania · North State Road 26H10 · Structure no. 000000000015220

Built
1966
59 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
16,656
2024 count
Owner
State
State Highway Agency

About this bridge

Lansdowne Avenue over Naylors Run is a concrete culvert carrying Lansdowne Avenue over Naylors Run in Delaware County, Pennsylvania. It was built in 1966, so it is 59 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 16,656 vehicles a day, roughly 5% of them trucks, projected to reach 27,222 by 2032. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLansdowne Avenue
CrossesNaylors Run
LocationNorth State Road 26H10
RouteState Highway 0
Coordinates39.9595, -75.28775
Functional classUrban Other Principal 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,656 (2024)
Projected traffic27,222 by 2032
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Lansdowne Avenue over Naylors Run built?

It was built in 1966, making it 59 years old in 2025.

What condition is Lansdowne Avenue over Naylors Run 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 July 2023.

How much traffic does Lansdowne Avenue over Naylors Run carry?

About 16,656 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Lansdowne Avenue over Naylors Run?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns Lansdowne Avenue over Naylors Run?

It is owned by the State Highway Agency.