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
Loíza at Damsite - 50059000. |
Lago Loíza has a drainage
area of about 206.0 square miles (331 square kilometers). Originally,
the reservoir had a water storage capacity of 21,735 acre-feet (26.8 million
cubic meters), but by 1994 the capacity had been reduced by sediment infilling
to. During 1995, the Sergio Cuevas Filtration Plant produced 89
million gallons per day (337 million liters per day) of potable water
to supply more than 750,000 persons within the metropolitan area that
includes the municipios of San Juan, Trujillo Alto, Caguas, Gurabo, and
portions of San Lorenzo, Canóvanas, Loíza and Río Grande.
Loíza Basin Map
Click
on in the basin map
for combined real-time reservoir and rainfall information.
|
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 Loíza,
including:
Webb, R.M.T.,
and Soler-López, L.R., 1997, Sedimentation history of Lago Loíza,
Puerto Rico, 1953-94: U.S. Geological Survey Water-Resources Investigations
Report 97-4108, 18 p., 9 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 Loíza - 50059000 |
| Reservoir
elevation in |
Volume
in |
| meters |
feet |
million cubic
meters |
acre-ft |
| 41.14 |
135 |
14.19 |
11,504 |
| 41 |
135 |
13.80 |
11,188 |
| 40 |
131 |
11.37 |
9,218 |
| 39 |
128 |
9.19 |
7,450 |
| 38 |
125 |
7.23 |
5,861 |
| 37 |
121 |
5.48 |
4,443 |
| 36 |
118 |
3.91 |
3,170 |
| 35 |
115 |
2.72 |
2,205 |
| 34 |
112 |
1.79 |
1,451 |
| 33 |
108 |
1.08 |
876 |
| 32 |
105 |
0.58 |
470 |
| 31 |
102 |
0.30 |
243 |
| 30 |
98.4 |
0.18 |
146 |
| 29 |
95.1 |
0.09 |
73.0 |
| 28 |
91.9 |
0.04 |
32.4 |
| 27 |
88.6 |
0.02 |
16.2 |
| 26 |
85.3 |
0.004 |
3.24 |
| 25 |
82.0 |
0.001 |
0.81 |
| 24 |
78.7 |
0.0003 |
0.24 |
| 23 |
75.5 |
0.00 |
0.00 |
|
View
looking up-stream toward Carraizo Dam, under drought conditions
. Photo by Matthew Larsen, USGS
|
Lago
de Loíza Reservoir during Hurricane Hortense. Photo by Matthew
Larsen, USGS
|
|
|
U.S. Department of the Interior |
U.S. Geological Survey
Pedestrians walking along top of Lago Loíza Reservoir dam
in the 1950's. Photo from USGS archive.