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Water Resources of the Caribbean

Lago Cerrillos at Damsite - 50113950

Two USGS employees, George Arroyo and Wilfredo Garcia, in the process of installing a gage station at Lago Cerrillos Reservoir.  USGS photo archive, August 1997
Two USGS employees installing a gaging station at Lago Cerrillos Reservoir.  Photo from USGS archive.

Lago Cerrillos is located in the municipio of Ponce, and was finished in 1992 by U.S. Army Corp of Engineers.  The main purposes of the reservoir are flood control, water supply, and recreation.  The reservoir has a drainage area of 17.4 square miles (45.1 square kilometers).  The reservoir has a water storage capacity of about 47,900 acre-feet (59.1 million cubic meters).  This reservoir is an alternative of water supply to the population living in the south coast of Puerto Rico.

Lago Cerrillos Reservoir during it's construction phase.
Lago Cerrillos Reservoir during construction. Photo by Pedro Díaz, 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 Cerrillos at Damsite - 50113950

Additional Lago Cerrillos Reservoir real-time information:

Additional information about the Lago Cerrillos Reservoir is available from the U.S. Army Corps of Engineers, Jacksonville district  -  Water Management & Meteorology Section

Río Loco Basin Map

Click  on Lake symbol for combined real-time reservoir level and rainfall information

50113950 Río Loco Basin Map

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 the 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.

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