US Bridges

Big Oak Road over Rock Run

Fair

Bucks County, Pennsylvania · West Morrisville 38G04 · Structure no. 000000000007198

Built
1955
70 years old
Condition
Fair
inspected April 2024
Type
Slab
Concrete
Length
34 ft
2 main spans
Daily traffic
7,226
2024 count
Owner
State
State Highway Agency

About this bridge

Big Oak Road over Rock Run is a concrete slab carrying Big Oak Road over Rock Run in Bucks County, Pennsylvania. It was built in 1955, so it is 70 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 7,226 vehicles a day, roughly 5% of them trucks, projected to reach 8,740 by 2032. The structure is 34 ft (10.4 m) long and 42 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesBig Oak Road
CrossesRock Run
LocationWest Morrisville 38G04
RouteState Highway 0
CountyBucks County
StatePennsylvania
Coordinates40.20889, -74.81884
Functional classUrban Collector

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 inspectionApril 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 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 rating60 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span14 ft (4.3 m)
Deck width42 ft (12.9 m)
Roadway width41 ft (12.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,226 (2024)
Projected traffic8,740 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Big Oak Road over Rock Run built?

It was built in 1955, making it 70 years old in 2025.

What condition is Big Oak 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 April 2024.

How much traffic does Big Oak Road over Rock Run carry?

About 7,226 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Big Oak Road over Rock Run?

The structure is 34 ft (10.4 m) long with a longest span of 14 ft (4.3 m) and a deck 42 ft wide.

Who owns Big Oak Road over Rock Run?

It is owned by the State Highway Agency.