What significant event regarding the Colorado River occurred in 1922?

The Colorado River Compact, established in 1922, was a pivotal agreement among seven U.S. states that rely on the Colorado River for water resources. The Compact was significant because it allocated the river's waters among the states, helping to manage and distribute this vital resource and laying the foundation for water rights and usage in the region.

This agreement came about due to increasing demands for water in the arid southwestern United States as populations grew and agriculture expanded. The Compact aimed to equitably share the river's water, recognizing the need for stability and sustainability in an area prone to droughts and water scarcity. It is a landmark event in the history of water resources management in the United States and has had lasting implications for water law and policy in the West.

While the construction of Hoover Dam and other events mentioned are important in the broader context of water management, they occurred after the Compact was established and were largely influenced by the agreements set forth in it. The East Bay Municipal Utility District and the flooding of Hetch Hetchy Valley relate to different aspects of water infrastructure and conservation issues specific to California and do not pertain to the specific event regarding the Colorado River in 1922.