The most iconic part of the aqueduct, its reservoir, it located on the Cerro San Tomas hill, next to sector Mameyes, in the Barrio La Cantera in the city of Ponce.
History
Construction of the aqueduct was heavily promoted in the Ponce newspaper "El Fénix" by Don Eustaquio Quesada and Don Salvador Coronas. Construction started on 21 August 1876. The 1876 construction cost was of $220,000. It became operational in that year. It was completed in 1880 and it operated for 48 years—until 1928. Its construction was made possible by a generous 54,000 Spanish pesos donation from Valentin Tricoche, who also left in his will moneys for the construction of Hospital Tricoche.
Watershed feeder system
The watershed for the Acueducto de Ponce water supply system consisted of about 30 square kilometers of the valley of the Rio Portugués river. Rio Portugués has its source near the Ponce-Jayuya and Ponce-Adjuntas roads. The watershed approaches the PR-123 road for the first time at kilometer 18 and crosses it at kilometers 19 and 24. In 1915, in the part of the watershed nearest the aqueduct intake there were some 50 houses, five stables, two dairies, and a coffee hacienda. The population of the area was about 50 people. For this reason there was a some concern about potential contamination of the aqueduct water supply.
Description
The aqueduct was long, or approximately 4,442 yards. The gravity-based aqueduct was initially 3,000 meters long from the dam to the reservoir. It was later enlarged to 4,100 meters, but was eventually decommissioned, under the mayoral administration of Guillermo Vivas Valdivieso, when a new, pump-based, water supply system was inaugurated. At its highest point the aqueduct rose 50 feet high.
Intake dam
The intake dam for the aqueduct was located at Río Portugués, about 1 kilometer north of the mouth of Rio Chiquito. It was made of a low masonry wall, or diversion weir, and had very little storage capacity. There was a small pool in front of the intake, deep enough to protect it, which was screened to keep out floating debris.
Conduit
The water was carried from the intake to the reservoir in a brick conduit channel. The dimensions of the conduit channel were 0.52 meter wide by 0.55 meter deep. The conduit had a semicircular crown. The conduit ran through land covered with brush and young trees. It also ran through pasture land and old cattle yards. Further south it also passed along the side of a very steep hill and just before reaching the reservoir, it also passed through the Mameyes sector of La Cantera neighborhood.
Reservoir
The reservoir was of brick lined with cement. It was covered. It had a capacity for 2,000 cubic meters. The reservoir was divided into two compartments. The insular government at the time estimated that the reservoir held a one day's supply of water for the city residents which then consisted of a population of 35,000.
With the advent of more advanced water supply systems, the aqueduct was retired in 1928, and eventually abandoned. It laid in ruins for many decades. In 2015, however, Puerto Rico senator Víctor Vasallo Anadón presented a bill in the Puerto Rico Senate to enact legislation to designate the aqueduct a historic structure worth preserving and secure funds for its preservation. On 9 June 2015, it was voted a National Historic Monument. On 17 June 2015, it was declared a National Historic Monument. It was listed on the U.S. National Register of Historic Places on 30 December 2019.
