US Bridges

Gilmore Road over Naylors Run

Fair

Delaware County, Pennsylvania · 100 S. of PA-3 3588-B5 · Structure no. 000000000015421

Built
1946
79 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete
Length
28 ft
1 main span
Daily traffic
490
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Gilmore Road over Naylors Run is a concrete tee beam carrying Gilmore Road over Naylors Run in Delaware County, Pennsylvania. It was built in 1946, so it is 79 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 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 490 vehicles a day, roughly 2% of them trucks, projected to reach 600 by 2036. The structure is 28 ft (8.5 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesGilmore Road
CrossesNaylors Run
Location100 S. of PA-3 3588-B5
RouteCity Street 0
CountyDelaware County
StatePennsylvania
Coordinates39.96968, -75.30249
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating50 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width37 ft (11.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic490 (2016)
Projected traffic600 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$294,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Gilmore Road over Naylors Run built?

It was built in 1946, making it 79 years old in 2025.

What condition is Gilmore Road 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 May 2024.

How much traffic does Gilmore Road over Naylors Run carry?

About 490 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Gilmore Road over Naylors Run?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 37 ft wide.

Who owns Gilmore Road over Naylors Run?

It is owned by the Town or Township Highway Agency.