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Student Project: Interstate Water Compacts: Federal Law

This research guide explores Interstate Water Compacts in the United States at both the federal and state levels. Specifically, it will explore the law of California, Arizona and Colorado.


The National Center for Interstate Compacts "CSG's National Center for Interstate Compacts Database allows you to search more than 1,500 statutes for state-by-state interstate compact membership, serving as the most useful and innovative search tool for researching interstate compacts available."

Colorado River Compact: “Apportions the waters of the Colorado River Basin. Congress authorized seven states in 1921 to negotiate the compact. Six of them ratified the compact promptly, but Arizona did not join until 1944. An amendment was adopted in 1925 to waive the requirement that all seven states approve. Congress accepted the revision in the 1928 Boulder Canyon Project Act, which, however, required California's approval. California approved the amended compact in 1929.”


Federal Statutes

Federal Cases

Federal Regulations