US Bridges

Trenton Avenue over Rock Run

Fair

Bucks County, Pennsylvania · .5MI.NORTH US-1 38H06 · Structure no. 000000000007219

Built
1920
105 years old, rebuilt 1940
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
9,029
2024 count
Owner
State
State Highway Agency

About this bridge

Trenton Avenue over Rock Run is a steel stringer/multi-beam or girder carrying Trenton Avenue over Rock Run in Bucks County, Pennsylvania. It was built in 1920 and reconstructed in 1940, so it is 105 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 9,029 vehicles a day, roughly 5% of them trucks, projected to reach 16,346 by 2032. The structure is 28 ft (8.5 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesTrenton Avenue
CrossesRock Run
Location.5MI.NORTH US-1 38H06
RouteState Highway 0
CountyBucks County
StatePennsylvania
Coordinates40.20185, -74.80917
Functional classUrban Minor 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
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.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span25 ft (7.6 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,029 (2024)
Projected traffic16,346 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$550,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Trenton Avenue over Rock Run built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1940.

What condition is Trenton Avenue 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 May 2024.

How much traffic does Trenton Avenue over Rock Run carry?

About 9,029 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Trenton Avenue over Rock Run?

The structure is 28 ft (8.5 m) long with a longest span of 25 ft (7.6 m) and a deck 33 ft wide.

Who owns Trenton Avenue over Rock Run?

It is owned by the State Highway Agency.