The Indus River basin lies between Pakistan and India, and has become a major point of contention between the two nations. The Indus River is the most important water supplier for the Punjab plains and is the foundation of all water supply for Pakistan. While India has upstream control of the Indus River, a treaty signed in 1960 by the two nations ensures that Pakistan will retain water from the river. Current issues about this river and the lands that it feeds include India's creation of dams and hydroelectric structures upstream that have started limiting Pakistan's access to water downstream.