US Bridges

Swamp Road over Doylestown Bypass

Fair

Bucks County, Pennsylvania · North Doylestown 22K08 · Structure no. 000000000006983

Built
1973
52 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
224 ft
4 main spans
Daily traffic
16,044
2024 count
Owner
State
State Highway Agency

About this bridge

Swamp Road over Doylestown Bypass is a prestressed concrete stringer/multi-beam or girder carrying Swamp Road over Doylestown Bypass in Bucks County, Pennsylvania. It was built in 1973, so it is 52 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 16,044 vehicles a day, roughly 6% of them trucks, projected to reach 24,620 by 2032. The structure is 224 ft (68.3 m) long and 92 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesSwamp Road
CrossesDoylestown Bypass
LocationNorth Doylestown 22K08
RouteState Highway 313
CountyBucks County
StatePennsylvania
Coordinates40.33151, -75.13511
Functional classUrban Other Principal 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.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length224 ft (68.3 m)
Longest span79 ft (24.1 m)
Deck width92 ft (28.1 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,044 (2024)
Projected traffic24,620 by 2032
Trucks6%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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$495,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Swamp Road over Doylestown Bypass built?

It was built in 1973, making it 52 years old in 2025.

What condition is Swamp Road over Doylestown Bypass 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 June 2024.

How much traffic does Swamp Road over Doylestown Bypass carry?

About 16,044 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Swamp Road over Doylestown Bypass?

The structure is 224 ft (68.3 m) long with a longest span of 79 ft (24.1 m) and a deck 92 ft wide.

Who owns Swamp Road over Doylestown Bypass?

It is owned by the State Highway Agency.