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DRAFT - 11 -05 -10 <br />ENVIRONMENTAL ACCOUNT <br />2011 WATER YEAR ANNUAL OPERATING PLAN <br />WATER YEAR 2011 PROJECTIONS AND EA RELEASE PRIORITIES <br />Water Year 2011 Projected Water Supply <br />The Districts provided the following predictions for SNI and Type -of -Year for WY11 to the EA <br />Manager on October 4, 2010. <br />Item <br />SNI, October through March <br />SNI, October through April <br />Type -of -Year <br />Prediction <br />480,000 of <br />570,000 of <br />Wet <br />The Type -of -Year is based on the predicted SNI (480,000 at) and Lake McConaughy carry -over <br />contents on October 1, 2010 (1,579,800 af). Predictions of SNI for WYl 1 are 130 -135% higher <br />than the actual values for WY 10. <br />If the WYl 1 predictions hold true and no EA releases are made, EA content by the end of <br />September, 2010 will be about 101,500 of (i.e., 10% SNI + Carry Over - Evap.& Seepage or <br />57,000 + 120,060 - 10,000 = 167,060). However, as explained in the sections below, EA <br />releases are planned during WY 11. <br />Water Year 2011 Projected District Operations <br />Based on the vast improvement from "Dry" to a "Wet" condition, predictions of normal South <br />Platte and above normal North Platte flows, the Districts have described operational keys that <br />include: <br />• Prepare for excess water from Wyoming (create room in McConaugy storage) <br />• Pre - irrigation season maximize hydropower generation <br />• Results in 1,700 cfs outflow from J -2 Return to Central Platte <br />• Outflow combines with natural flow and gains to equal c.a. 2,000 cfs <br />• Normal operation of Elwood <br />• Normal delivery of irrigation water (no allocation, but base -rate pricing structure) <br />Water Year 2010 Environmental Account Release Priorities <br />w y l 1 <br />EA Release Priorities for W*9 -(all periods not listed are prioiritized as "Low "): <br />Oct 1 —Nov 15 2,400 <br />Feb 16 — Mar 15 3,350 <br />Mar 23 — May 10 2,400 <br />May 11 — Sept 15 1,200 <br />Carry -over <br />whooping crane, waterfowl <br />system processes (e.g. pulse) <br />whooping crane, others <br />least tern, piping plover <br />Medium <br />High — 5 D4F <br />High <br />High <br />Medium <br />