9367 ‎(4)‎

• UCREFRP Catalog Number: 9367
• Author: Colorado Water Workshop.
• Title: Proceedings
• USFW Year: 1992.
• USFW - Doc Type: Colorado Water Workshop July 22-24, 1992.
• Copyright Material: NO

L 2drtment of Natural Resour, s
Colorado Water Conservation Board
Colorado River Basin
Basic Facts
The following information reflects a very simplified
presentation of Colorado River Basin data and facts and does
not necessarily reflect the final position of the State of
Colorado regarding these matters.
This presentation does not waive any position Colorado may
take in the future concerning any aspect on the interpretation
of the Law of the River.
Law of the River
1922 - Colorado River Compact
1928 - Boulder Canyon Project Act
1929 - California Limitation Act
1931 - California Seven Water Party Agreement
1940 - Boulder Canyon Project Adjustment Act
1944 - Mexican Water Treaty
1948 - Upper Colorado River Basin Compact
1956 - Colorado River Storage Project Act
1964 - Arizona v California - U.S. Supreme Court
1968 - Colorado River Basin Project Act
1970 - Long-Range Operating Criteria
Compact Apportionment
Lower Colorado River Basin States: 7,500,000 of of
75,000,000 per 10 yr. consumptive use per annum
California
Arizona
Nevada
4,400,000 of
2,800,000 of
300,000 of
7,500,000 of
Upper Colorado River Basin States: 7,500,000 at* of
consumptive use per annum; additionally the Upper Basin
States will not deplete the flow of the Colorado River at
Lee Ferry below 75 million of in any 10 year period.
Arizona 50,000 of
Colorado 51.75% - 3,079,000 of
New Mexico 11.25% - 669,000 of
Utah 23.00% - 1,368,000 of
Wyoming 14.00% - 833.000 of
6,000,000 of

* 1988 Bureau of Reclamation Hydrologic Determination:
Physical water supply available to Upper Basin States is only
6,000,000 of and this assumes that the upper Basin is
responsible for one-half of the Mexican Treaty obligation.
The Upper Basin States do not agree with this assumption
4035E*