US Bridges

Hilldale Road over Darby Creek

Poor

Delaware County, Pennsylvania · Hilldale Adc 22-A4 · Structure no. 000000000015411

Built
1928
97 years old
Condition
Poor
inspected December 2023
Type
Tee Beam
Concrete
Length
92 ft
2 main spans
Daily traffic
1,554
2022 count
Owner
County
County Highway Agency

About this bridge

Hilldale Road over Darby Creek is a concrete tee beam carrying Hilldale Road over Darby Creek in Delaware County, Pennsylvania. It was built in 1928, so it is 97 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,554 vehicles a day, roughly 5% of them trucks, projected to reach 1,731 by 2042. The structure is 92 ft (28 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesHilldale Road
CrossesDarby Creek
LocationHilldale Adc 22-A4
RouteCity Street 0
CountyDelaware County
StatePennsylvania
Coordinates39.9348, -75.277
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length92 ft (28 m)
Longest span46 ft (14 m)
Deck width38 ft (11.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,554 (2022)
Projected traffic1,731 by 2042
Trucks5%
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

OwnerCounty Highway Agency
Maintained byCounty 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$284,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hilldale Road over Darby Creek built?

It was built in 1928, making it 97 years old in 2025.

What condition is Hilldale Road over Darby Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does Hilldale Road over Darby Creek carry?

About 1,554 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Hilldale Road over Darby Creek?

The structure is 92 ft (28 m) long with a longest span of 46 ft (14 m) and a deck 38 ft wide.

Who owns Hilldale Road over Darby Creek?

It is owned by the County Highway Agency.