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Puente San Antonio


Elevation West Side, From San Antonio Channel (Context)

Photo taken by Hector Mendez-Caratini for the Historic American Engineering Record

View photos at Library of Congress

BH Photo #301459



Puente San Antonio was constructed in 1924-25 to carry a new highway serving the dock area of the San Juan islet. It was erected parallel to existing highway, railroad and trolley bridges spanning the San Antonio Channel. Located within one of the most attractive urban areas of the Caribbean, this bridge lies today next to one of Puerto Rico's few remaining railroad bridges and near the modern occupant of the island's most historic bridge site. Puente San Antonio, designed and built respectively by Rafael Nones and Robert Prann, both renowned engineers, is listed in Puerto Rico's Inventory of Historic Bridges and mentioned in the Multiple Property Nomination of Puerto Rico's Bridges and its Associated Historic Context, Land Transportation in Puerto Rico, c. 1508-1950 as an exceptional beam bridge due to its monumental style. Although its standard beam structure is not considered significant in engineering terms, important items provide historic significance to the San Antonio Bridge: total length; number of spans; decorative elements; exemplification of the work of masters; the important route that it serves; and its surroundings.

-- Historic American Engineering Record


Lost Closed-spandrel arch bridge over Caņo de San Antonio on PR-1
San Juan, Puerto Rico
Replaced by a new bridge
Built 1924-1925; Replaced 2000
- Rafael Nones of San Juan, Puerto Rico
- Robert R. Prann of San Juan
Closed-spandrel arch
Approximate latitude, longitude
+18.45897, -66.08680   (decimal degrees)
18°27'32" N, 66°05'12" W   (degrees°minutes'seconds")
Approximate UTM coordinates
19/807697/2043443 (zone/easting/northing)
Quadrangle map:
San Juan
Inventory number
BH 63615 (Bridgehunter.com ID)


Arch (12,528)
Built 1925 (1,294)
Built during 1920s (10,138)
Closed-spandrel arch (4,204)
Deck arch (11,768)
HAER documented (1,112)
Lost (27,328)
Lost 2000 (402)
Lost during 2000s (4,324)
Puerto Rico (176)
Rafael Nones (7)
Replaced by new bridge (18,553)
Robert R. Prann (2)
San Juan, Puerto Rico (30)

Update Log 

  • October 13, 2014: Added by Dave King

Related Bridges 


  • Dave King - DKinghawkfan [at] hotmail [dot] com
  • HAER PR-35 - Puente San Antonio, Spanning San Antonio Channel, San Juan, San Juan Municipio, PR