US Bridges

Union Mill Drive over Delaware Canal

Fair

Bucks County, Pennsylvania · At SR 32 Intersect · Structure no. 000000000007727

Built
1832
193 years old, rebuilt 1967
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
60
2012 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Union Mill Drive over Delaware Canal is a prestressed concrete box beam or girders - multiple carrying Union Mill Drive over Delaware Canal in Bucks County, Pennsylvania. It was built in 1832 and reconstructed in 1967, so it is 193 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 60 vehicles a day, projected to reach 70 by 2032. The structure is 58 ft (17.7 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesUnion Mill Drive
CrossesDelaware Canal
LocationAt SR 32 Intersect
RouteState Lands Road 0
CountyBucks County
StatePennsylvania
Coordinates40.3508, -74.9482
Functional classRural 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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating18 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span56 ft (17.1 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2012)
Projected traffic70 by 2032
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$25,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Mill Drive over Delaware Canal built?

It was built in 1832, making it 193 years old in 2025. It was reconstructed in 1967.

What condition is Union Mill Drive over Delaware Canal 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 March 2023.

How much traffic does Union Mill Drive over Delaware Canal carry?

About 60 vehicles per day (2012 count).

How long is Union Mill Drive over Delaware Canal?

The structure is 58 ft (17.7 m) long with a longest span of 56 ft (17.1 m) and a deck 22 ft wide.

Who owns Union Mill Drive over Delaware Canal?

It is owned by the State Park, Forest, or Reservation Agency.