Text Box: DERIVATION OF WATER RATIONING TRIGGERS FOR THE MONTEREY PENINSULA WATER RESOURCE SYSTEM FOR WATER YEAR 2009 (All Values are in Acre-Feet)
 
   
   
   
   
                           
  PRODUCER MAY-SEPTEMBER CARRYOVER  TOTAL STORAGE  
  DEMAND STORAGE REQUIRED ON MAY 1  
   
  Percent of Annual Demand Water Rationing Stage   
  100% 67% 33% 0% 4 5 6 7  
   
  15% 20% 35% 50%  
  System-wide demand reduction   
  imposed if storage is less than  
  "Total" shown in boxed area below  
                           
   
  Cal-Am 7,477 14,747 9,880 4,867 0 22,224 17,357 12,343 7,477  
   
  Non Cal-Am 1,946 3,046 2,041 1,005 0 4,992 3,987 2,952 1,946  
   
  Total 9,423 17,793 11,921 5,872 0 27,216 21,344 15,295 9,423  
   
                           
  Text Box: Notes: 1. The May-September period refers to the remainder of the current water year. 2. Carryover storage refers to the volume of usable surface and groundwater that is in storage at the end of the current water year and is projected to be available for use at the beginning of the following water year. 3. Total storage refers to the combination of demand remaining from May 1 to the end of the current water year and carryover storage for the next water year that is required to avoid imposing various levels of water rationing. The values in bold type represent the storage triggers that would be used for the system in Water Year 2009. The values are based on the current production limit for California American Water (Cal-Am) from Carmel River sources (11,285 acre-feet per year) set by the State Water Resources Control Board in Order No. WR 95-10, the production limit for Cal-Am from the Seaside Groundwater Basin (3,462 acre-feet per year) set by the Court in its March 27, 2006 adjudication decision and adjusted by the Seaside Watermaster on May 7, 2009, and the production limit specified for non Cal-Am users from the Monterey Peninsula Water Resource System set in the District's Water Allocation Program (Ordinance No.87). 4. Cal-Am's production limit from the Seaside Basin is reduced by 387 acre-feet in Water Year 2009 to reflect the 10% reduction in basin operating yield that was ordered in the adjudication decision. 5. The rationing triggers are based on physical water availability and do not account for legal or environmental constraints on diversions from the Carmel River system.