WSP12636

• File Number: 8282.300
• Description: Colorado River Operations and Accounting - Lower Basin Administrative Procedures
• State: CO
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 8/1/1996
• Author: DOI-BOR
• Title: Description and Assessment of Operations-Maintenance and Sensitive Species of the Lower Colorado River - Volume II - Appendices-Etc - 08-01-96
• Water Supply Pro - Doc Type: Report/Study

I
I
I
I
I
I
I
I
I
I
I
I
'I
I
I
I
I
I
I

OD2528

digit alpha-numeric code energized by passing a magnet over tag.

Present perfected right or PPR: perfected rights defined by the Decree, existing as of
June 25, 1929, the effective date of the Boulder Canyon Project Act. Present perfected
rights are listed in the supplemental Court decrees entered January 9, 1979, and April 16,
1984, and in future supplemental decrees by the United States Supreme Court.

Reasonable beneficial use: the diversion, distribution, delivery, and use of Colorado River
water for a useful or beneficial purpose in an amount not to exceed that reasonably required
for such use or purpose.

Reclamation: the Bureau of Reclamation of the Department of the Interior.

Returns or return flow: Colorado River water diverted from the mainstream which flows
back to the mainstream either through surface or subsurface means and is available for
consumptive use in the United States or in satisfaction of the Mexican treaty obligation.

Riprap: an uncontained rock blanket placed for bankline protection.

Secretarial reserved entitlement: 1) an entitlement set aside for a Federal agency via notice
in the Federal Register, or 2) an entitlement established in an agreement between
Reclamation and another Federal agency.

Secretary: the Secretary of the Interior or a duly authorized representative.

Seven-Party Agreement: the agreement dated August 18, 1931, among the Palo Verde
Irrigation District, the Imperial Irrigation District, the Coachella Valley Water District, The
Metropolitan Water District of Southern California, the City of Los Angeles, the City of San
Diego, and the County of San Diego.

Southerly International Boundary: that portion of the boundary between the United States
and Mexico that is delineated by the border between Mexico and the State of Arizona that
extends southeasterly from the Colorado River. .

Subsurface water: water beneath the land surface.

Surface water: water at or above the land surface.

SUl:plus apportionment: the Colorado River water apportioned to the lower Colorado River
basin in any 1 year when the Secretary determines as part of the AOP surplus sufficient
water is available in excess of 7.5 maf of annual consumptive use in the lower basin. Article
II(B)(2) of the Decree provides that water available for annual consumptive use in excess of
7.5 maf shall be apportioned as follows: 50 percent for use in California, 46 percent for use
in Arizona, and 4 percent for use in Nevada.

206