Bureau of Reclamation Lower Colorado Region Banner
Reclamation Home             Reclamation Offices             Newsroom             Library             Projects & Facilities

Lower Colorado River Water Accounting

More Info

History and Types of Reports

USGS Hydrologic Studies

Guidance Documents
     Inadvertent Overrun and Payback Policy
     43 CFR Part 417
     Unused Water Policy
     Yuma Area Water Accounting Policy Beginning in CY 2003

Forecasted Water Use - 2012

Actual Water Use - 2012



The Colorado River is the principal source of water for irrigation and domestic use in Arizona, southern California, and southern Nevada.

The Secretary of the Interior annually provides detailed and accurate records of diversions, return flows, and consumptive use of water diverted from the mainstream of the Colorado River below Lee Ferry (lower Colorado River) through the two reports below:



Note: All reports are formatted as Adobe Acrobat PDF files.

Decree Accounting Reports


These "Decree accounting reports", tabulate measured diversions, measured returns and consumptive use of each user taking water from the lower Colorado River:
new button 2013 (888 KB)
2012 (1.4 MB)
2011 (1.2 MB)
2010 (1.6 MB)
2009 (1.1 MB)
2008 (1.9 MB)
2007 (5.3 MB)
2006 (2.4 MB)
2005 (1.1 MB)
2004 (1.2 MB)
2003 (647 KB)
2002 (1.3 MB)
2001 (1.7 MB)
2000 (1.2 MB)
1999 (1.2 MB)
1998 (1.2 MB)
1997 (1.0 MB)
1996 (1.1 MB)
1995 (1.0 MB)
1994 (1.0 MB)
1993 (1.0 MB)
1992 (1.0 MB)
1991 (937 KB)
1990 (997 KB)
1989 (927 KB)
1988 (996 KB)
1987 (1.0 MB)
1986 (804 KB)
1985 (915 KB)
1984 (787 KB)
1983 (782 KB)
1982 (843 KB)
1981 (1.2 MB)
1980 (885 KB)
1979 (927 KB)
1978 (900 KB)
1977 (896 KB)
1976 (903 KB)
1975 (906 KB)
1974 (1.0 MB)
1973 (937 MB)
1972 (1.0 MB)
1971 (1.1 MB)
1970 (985 MB)
1969 (841 KB)
1968 (897 KB)
1967 (848 KB)
1966 (723 KB)
1965 (677 KB)
1964 (464 KB)

Contact: Paul Matuska at: pmatuska@usbr.gov.


LCRAS Reports


The "Lower Colorado River Accounting System Demonstration of Technology" reports document the consumptive use results that LCRAS can provide for the Decree accounting reports, and the data and calculations LCRAS uses to produce those results.

NOTE: Because of the large size of the reports, when the "View Report" option is selected, only the front page of the report will be displayed. This will contain highlighted, clickable links to the body of the reports and their associated appendices.

Contact: Nicole Everett at: neverett@usbr.gov.


Updated: May 2014