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I I I I I I I I I I I I I I I I I I I Mr. David L. Pope and Ms. Mary Louise Clay October 25, 2000 Page 2 o ':"'J ~ o -.J W river reaches where no replacements or only partial replacements were made to replace out-of- priority depletions to senior surface water rights in Colorado. Table 3 shows the remaining stream depletions caused by irrigation pwnping in excess of the pre-Compact entitlements which were not replaced by making replacements to senior surface water rights in Colorado. These stream depletions were computed using the wellhead depletions shown in Table 2 with the Ground Water Accounting Model. Please note that in Reaches II, 12, and 13, replacements to senior surface water rights in Colorado replaced 100% of the stream depletions caused by pwnping affecting those reaches since there was a call by a Colorado surface water right in those reaches on all of the days in August. Also note that in Reaches 14, 15, and 16, replacements to senior surface water rights in Colorado replaced 32% ofthe stream depletions caused by pwnping affecting those reaches since there was a call by a Colorado surface water right in those reaches on 10 days in August. The remaining depletions shown in Table 3 are the estimated stream depletions caused by irrigation pwnping in excess of the pre- Compact entitlements remaining after replacements were made to senior surface water rights in Colorado. Table 3 also shows the estimated depletions to usable Stateline flow which were calculated using the assumptions in paragraph 5.8 of the Resolution, and the replacements to Stateline flows which were made during the month. A delivery of water to the Offset Account was initiated during the month of July, 2000 by LA WMA using consumptive use credits from their ownership in the Highland Canal. This delivery netted 471.48 acre-feet of fully consumable water into the Offset Account during August, 2000. Also, a release of water from the Offset Account was initiated on July 28, 2000. This release was completed on August 1,2000 when the Offset Account was emptied. A total of 2504,17 acre-feet was released from the Offset Account by the end of July and 76.89 acre-feet was released on the fIrst day of August. As of August 31, 2000, there were 463.83 acre-feet being stored in the offset account. Please contact me if you have any questions or require additional information. Sincerely, 4//!dL Steven J. Witte Division Engineer Colorado Division of Water Resources cc: Mark Rude John Draper Dale Book Hal Simpson Dennis Montgomery Don Taylor Aurelio Sisneros Randy Hayzlett David Brenn Steve Miller Thomas R. Pointon James G, Rogers -