Arenas Bridge

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Arenas Bridge
Arenas Bridge.jpg
Arenas Bridge in 1993
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Arenas Bridge
Location of the Arenas Bridge in Puerto Rico
LocationPR urban primary 735.svg PR-735, Cayey / Cidra, Puerto Rico
Coordinates 18°08′04″N66°08′17″W / 18.134325°N 66.138119°W / 18.134325; -66.138119 Coordinates: 18°08′04″N66°08′17″W / 18.134325°N 66.138119°W / 18.134325; -66.138119
Arealess than one acre
Built1894
ArchitectSichar, Mariano; Nicrisse & Decluve, et al.
Architectural stylemetal truss
MPS Historic Bridges of Puerto Rico MPS
NRHP reference No. 95000843 [1]
Added to NRHPJuly 19, 1995

The Arenas Bridge is a truss bridge built in 1894 between the municipalities of Cayey and Cidra in Puerto Rico. Also known as Puente Rio La Plata, it was the longest bridge constructed in Puerto Rico during the Spanish colonial period. It crosses the Rio de la Plata, the longest river in Puerto Rico. According to the U.S. National Park Service, "[t]his is the most important metal bridge in Puerto Rico from the period." [2] The bridge is still standing. [3]

Contents

History

The bridge was built as "part of the Carretera Central, the first highway across the central mountains of Puerto Rico." [2] The Carretera Central, a 134 kilometer highway between San Juan and the port of Ponce was largely completed by 1886, with temporary bridges in place at some crossings and 13 permanent bridges completed. [4] : E-7  The installation of the permanent Arenas Bridge in 1894 was near the completion of the Carretera in 1898. [4] : E-7 

Because of scarcity of iron in Puerto Rico, there were no metal fabricators in the country. Instead, bridges like this were fabricated overseas and shipped in parts to Puerto Rico. A Spanish government agent in Paris secured international bids, largely from French and Belgian firms, for bridges to be built in the overseas colonies of Spain. [4] : E-10  The Arenas Bridge itself was fabricated by Nicaise et Delcuve, a Belgian firm, and was shipped on the steamship Teutonia to Puerto Rico for assembly. [2]

An alternative to a truss bridge would have been a suspension bridge design, which was a well-developed technology for long spans before the Arenas Bridge was built. However, there were no truly long spans in Puerto Rico that would have absolutely required a suspension bridge in colonial times, as there are no particularly wide rivers or canyons, and chief engineer Manuel Sanchez-Nunez assessed that suspension bridges were unsuited to the tropical climate, even removing, a few years later, one that had been constructed in Caguas in 1857. [4] : E-5  As a result, suspension bridge technology was not widely employed in Puerto Rico. Even today it is believed that there are only a small number of suspension bridges in the commonwealth, one being a modern pedestrian bridge in Bayamon.[ citation needed ] Another one is located in Caguas. [5] [6] and yet another one, a vehicular one, is on the Bayamon-Naranjito border. [7]

The bridge was designed by Mariano Sichar. A steel truss bridge, it weighed 23,623 pounds and was contracted to be built for 56,221 pesos. Stone abutments to support the bridge were constructed under supervision of José Roque-Paniagua; engineer Julio Larrinaga oversaw assembly of the bridge. [2]

It brings what is now Puerto Rico Highway 735 over Rio de la Plata between Barrio Monte Llano and Barrio Arenas. [8] It is between the municipalities of Cayey and Cidra. [2]

In the Spanish–American War, American forces moved from south to north over the Carretara Central. Another Carretera bridge was demolished by the Spanish to delay the American advance, but not Arenas Bridge. [4] : E-12 

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References

  1. ↑ "National Register Information System". National Register of Historic Places . National Park Service. March 13, 2009.
  2. 1 2 3 4 5 "Historic Places in Puerto Rico and the Virgin Islands: A Travel Itinerary: Arenas Bridge". National Park Service.
  3. ↑ It is stated by the National Park Service that the bridge is still in use, at the bottom, here. However, this sat-image at Google indicates a newer bridge on the east for the modern traffic, and shows cars parked in approach to the historic bridge.
  4. 1 2 3 4 5 Luis F. Pumarada O'Neill (July 31, 1994). National Register of Historic Places Multiple Property Documentation: Historic Bridges of Puerto Rico, c. 1840-1950 (pdf). National Park Service.
  5. ↑ "Caguitas River Bridge".
  6. ↑ "Nature hike, suspension bridge, and criollo food! - Review of Jardin Botanico y Cultural William Miranda Marin, Caguas, Puerto Rico".
  7. ↑ "¿Para cuándo el arreglo del puente atirantado en Naranjito?". 5 April 2021.
  8. ↑ Per note in National Park Service's Focus database system, with spelling change from "Barrio Montellano" in that note to "Barrio Monte Llano", which is a barrio in Cayey.
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