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Water Resources of the Caribbean




Lago La Plata at Damsite - 50045000


Lago La Plata is located in the municipio of Toa Alta, and was constructed in 1974 by the Puerto Rico Aqueduct and Sewer Authority (PRASA). The main purpose of this reservoir is to serve as a public water-supply source for the people living in the municipios of Bayamón, Naranjito, and Toa Alta, among others

View of Lago La Plata Reservoir.  Photo by Matthew Larsen, 1999
View of Lago La Plata Reservoir.  Photo by Matthew Larsen, USGS.


Real-time Reservoir Level

Real-time resevoir level graph updated hourly with the exception of emergency transmissions which are at 5 minute intervals. To view real-time data, follow the link below.

Lago La Plata at Damsite - 50045000.


La Plata Basin Map


Click onLake symbol in the basin map for combined real-time reservoir and rainfall information.

La Plata Basin Map 50045000

Lago La Plata has a drainage area of 181.0 square miles(291 square kilometers). Originally, the reservoir had a water-storage capacity of 35,598 acre-feet ( 43.9 million cubic meters ), but by 1998 the capacity had been reduced by sediment infilling to 28,747 acre-feet ( 35.5 million cubic meters ). During 1995, the Enrique Ortega Filtration Plant produced 42 million gallons per day ( 159 million liters per day ) to serve a population of about 350,000 persons.

Chart correlating lake level elevation to water volume: Lago la Plata at Damsite - 50045000

The U.S. Geological Survey, in cooperation with PRASA, has produced a number of reports regarding effects of sediment infilling on storage capacity of Lago La Plata, including:

Soler-López L.R., Webb, R.M.T., and Carrasquillo-Nieves, R.A., 2000, Sedimentation Survey of Lago La Plata, Puerto Rico, October 1998: U.S. Geological Survey Water-Resources Investigations Report 00-4045, 23 p., 3 pls

In addition, the U.S. Geological Survey, in cooperation with local government agencies, has produced a number of reports regarding the effects of sediment infilling on the storage capacity of principle water-supply reservoirs of Puerto Rico.  The results of these surveys are summarized in "Sedimentation survey results of the principal water supply reservoirs of Puerto Rico,"

These reports can be purchased at a nominal cost by contacting Information Desk at the U.S. Geological Survey, GSA Center, 651 Federal Drive, Suite 400-15, Guaynabo, PR 00965, 787-749-4346 ext. 296.  Please contact Water-Use Information, 787-749-4346 ext. 259, if you have other questions regarding water supply in Puerto Rico.

The table below shows the relationship between reservoir level and available water. This information is presented in graphical format in the figure above. Note that an acre-foot is a volume of water that would cover an acre (43,560 square feet) to a depth of 1 foot.

Lago La Plata - 50045000

Reservoir elevation in Volume in
meters feet acre-ft million cubic
meters
52 171 28,747 35.5
51 167 26,330 32.5
50 164 24,019 29.6
49 161 21,863 27.0
48 157 19,813 24.4
47 154 17,925 22.1
46 151 16,135 19.9
45 148 14,479 17.9
44 144 12,916 15.9
43 141 11,513 14.2
42 138 10,189 12.6
41 135 8,988 11.1
40 131 7,872 9.71
39 128 6,874 8.48
38 125 5,942 7.33
37 121 5,105 6.30
36 118 4,320 5.33
35 115 3,616 4.46
34 112 2,965 3.66
33 108 2,395 2.95
32 105 1,874 2.31
31 102 1,432 1.77
30 98.4 1,018 1.26
29 95.1  686 0.85
28 91.9 402 0.50
27 88.6 218 0.27
26 85.3 51.2 0.06
25 82.0 0.00 0.00


Lago La Plata Reservior.  Photo by Mathew Larsen, 1999
Up-stream Lago La Plata Reservoir.  Photo by Matthew Larsen, USGS.

 


Upper section of La Plata Reservoir under drought conditions. Photo by Matthew Larsen, USGS.
Upper section of La Plata Reservoir under drought conditions.  Photo by Matthew Larsen, USGS.


 
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Page Last Modified: Jan 18, 2008, 13:57