Lago Guajataca at Damsite - 50010800
Photo of Lago Guajataca
by Senén Guzmán-Ríos, USGS.
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Lago Guajataca is located in the municipio of
Quebradillas and was constructed by the Puerto Rico Electric
Power Authority (PREPA)
in 1929. The dam was originally intended for public water
and irrigation water supply. In 1995, about 52 percent of the
water was used for public water supply and 48 percent for
irrigation.
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
Guajataca at Damsite - 50010800 |
Guajataca Basin Map
Click on  for combined
real-time reservoir and rainfall information
|
The Lago Guajataca has a drainage
area of 24.6 square miles (63.7 square kilometers).
Originally, the reservoir had a water storage capacity of 39,286
acre-feet (48.5 million cubic meters), but by 1999 the capacity
had been reduced by sediment infilling to 34,276 acre-feet (42.3
million cubic meters). During 1995, the reservoir had a
withdrawal of about 48 million gallons per day (182 million
liters per day); 23 million gallons per day (87 million liters
per day) were used to agricultural irrigation purposes, and the
other 25 million gallons per day (95 million liters per day)
were used to supply potable water to a population of about
179,000 persons among the municipios of Aguadilla, Isabela, Moca,
Aguada, and Quebradillas.
The U.S. Geological
Survey, in cooperation with PREPA, has produced a number of
reports regarding effects of sediment infilling on storage
capacity of Lago Guajataca, including:
Soler-López,
L.R., 2000, Sedimentation survey of Lago Guajataca,
Puerto Rico, January 1999: U.S. Geological Survey
Water-Resources Investigations Report 00-4044, 20 p., 1 pl.
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
Guajataca - 50010800 |
Reservoir
elevation in |
Volume
in |
meters |
feet |
acre-ft |
million cubic
meters |
| 196.9 |
646.0 |
34,276.83 |
42.28 |
| 195.9 |
642.7 |
31,544.34 |
38.91 |
| 194.9 |
639.4 |
28,892.59 |
35.64 |
| 193.9 |
636.2 |
26,328.47 |
32.48 |
| 192.9 |
632.9 |
23,837.17 |
29.40 |
| 191.9 |
629.6 |
21,469.46 |
26.48 |
| 190.9 |
626.3 |
19,228.13 |
23.72 |
| 189.9 |
623.0 |
17,147.54 |
21.15 |
| 188.9 |
619.8 |
15,193.27 |
18.74 |
| 187.9 |
616.5 |
13,395.80 |
16.52 |
| 186.9 |
613.2 |
11,712.18 |
14.45 |
| 185.9 |
609.9 |
10,220.44 |
12.61 |
| 184.9 |
606.6 |
8,821.63 |
10.88 |
| 183.9 |
603.3 |
7,539.25 |
9.30 |
| 182.9 |
600.1 |
6,336.94 |
7.82 |
| 181.9 |
596.8 |
5,253.55 |
6.48 |
| 180.9 |
593.5 |
4,247.89 |
5.24 |
| 179.9 |
590.2 |
3,375.11 |
4.16 |
| 178.9 |
586.9 |
2,586.13 |
3.19 |
| 177.9 |
583.7 |
1,942.06 |
2.40 |
| 176.9 |
580.4 |
1,368.67 |
1.69 |
| 175.9 |
577.1 |
912.99 |
1.13 |
| 174.9 |
573.8 |
510.67 |
0.63 |
| 173.9 |
570.5 |
291.66 |
0.36 |
| 172.9 |
567.3 |
130.25 |
0.16 |
| 171.9 |
564.0 |
58.33 |
0.07 |
| 170.9 |
560.7 |
13.80 |
0.02 |
| 169.9 |
557.4 |
0.00 |
0.00 |
|
Oblique
aerial view of the Lago Guajataca
Reservoir. Photo by Matthew Larsen, USGS.
|
Photo of Lago
Guajataca by Ramon Carrasquillo, USGS.
|
|
|
U.S. Department of the Interior |
U.S. Geological Survey
