US Bridges

Derbyshire Road over Rock Run

Fair

Bucks County, Pennsylvania · Lower Makefield 3151-G7 · Structure no. 000000000069744

Built
1971
54 years old
Condition
Fair
inspected December 2022
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
800
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Derbyshire Road over Rock Run is a prestressed concrete box beam or girders - multiple carrying Derbyshire Road over Rock Run in Bucks County, Pennsylvania. It was built in 1971, so it is 54 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 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 800 vehicles a day, roughly 1% of them trucks, projected to reach 880 by 2032. The structure is 28 ft (8.5 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDerbyshire Road
CrossesRock Run
LocationLower Makefield 3151-G7
RouteCity Street 0
CountyBucks County
StatePennsylvania
Coordinates40.20981, -74.83133
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width36 ft (11.1 m)
Roadway width29 ft (8.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2022)
Projected traffic880 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Derbyshire Road over Rock Run built?

It was built in 1971, making it 54 years old in 2025.

What condition is Derbyshire Road over Rock 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 December 2022.

How much traffic does Derbyshire Road over Rock Run carry?

About 800 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Derbyshire Road over Rock Run?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 36 ft wide.

Who owns Derbyshire Road over Rock Run?

It is owned by the Town or Township Highway Agency.