Lake Alajuela
Lake Alajuela () is an artificial lake in the Chagres River basin. The lake is bounded by the Madden Dam and linked to the Panama Canal. Lake Alajuela serves as a reservoir for the canal, which lies to the lake's southwest. 
It was created in 1935. The Chagres, Pequení, Boquerón, Salamanca, La Puente, Indio, Piedras, San Cristóbal and Escandaloso rivers flow into the lake. The rivers of Lake Alajuela contribute 45 percent of the total water for the canal.

The reservoir was formerly known as Madden Lake when the Canal Zone was under U.S. administration and was renamed after control of the canal reverted to Panama.

In early December 2010, Lake Alajuela reached its highest recorded water level, prompting authorities to close the Panama Canal for 17 hours. The canal reopened on December 9.
Q1408661
Chagres River
LOC
Q6726599
Madden Dam
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Q7350
Panama Canal
LOC
Q131681
reservoir
Concept
Q498979
Canal Zone
LOC
Q804
Panama
LOC
Q1416924
Lake Alajuela
LOC
Q1416924
Lake Alajuela
LOC
Q1416924
Lake Alajuela
LOC
Q1416924
Lake Alajuela
LOC
1935-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1935
DATE
2010-12-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
December 2010
DATE
+45^^http://www.w3.org/2001/XMLSchema#decimal
45
NUMBER
+17^^http://www.w3.org/2001/XMLSchema#decimal
17
NUMBER
+9^^http://www.w3.org/2001/XMLSchema#decimal
9
NUMBER
dam
lake outflow
instance of
country
lakes on river