Why is the Balsas River important for hydroelectric power in Mexico?

The Balsas River is a vital source of hydroelectric power in Mexico because it is dammed at the points where it crosses the Sierra Madre del Sur.1

Although the river's 479-mile course is unnavigable due to frequent interruptions by rapids, this geography, combined with the river's flow through the Balsas Depression, allows for extensive utilization for energy generation. In addition to its role in power production, the river is also used significantly for irrigation in the region.2