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<br />MEMORANDUM
<br />TO Hal Simpson, PE and Bill McIntyre, PE, Colorado State Engineer's Office
<br />Jim Hall, PE, Greeley Division Engineer's Office
<br />Grady McNeill, PE, Colorado Division of Wildlife (CDOW)
<br />FROM Jon Altenhofen, PE, Northern Colorado Water Conservancy District (NCWCD) and
<br />South Platte Lower River Group, Inc (SPLRG)
<br />DATE September 10, 2001
<br />REF Substitute Water Supply Plan for Tamarack Recharge Project
<br />Request for Extension to October 31, 2002 and Summary of Water Year 2001 Operations
<br />By letter from the State Engineer's Office dated March 16, 2000 with amendment dated March
<br />30, 2000, the Tamarack/Pony Express Substitute Water Supply Plan was approved through October 31,
<br />2001 with a 45 -day notice required for an extension Ten wells have pumped to recharge during Water
<br />Year 2001 as summarized in the following analysts The accretions from this recharge have provided
<br />replacement water for augmentation during this dry year and it is important that the Tamarack Substitute
<br />Water Supply Plan be renewed so these activities can continue
<br />We request that the Plan be renewed for another year under the same conditions as previously with one
<br />change to Condition 3 Condition 3 was modified by the March 30, 2000 letter to allow Well Nos 1, 2,
<br />or 5 to operate during periods of river call provided that accretions exceed depletions We would like
<br />Condition 3 to be changed so that any of the ten wells (Nos 1 thru 10) could be operated during_yenods
<br />of river call provided that accretions exceed depletions As the Tamarack project is developed on the
<br />CDOW Tamarack Ranch State Wildlife Area, additional features are being included such as wet
<br />meadows and wetlands, minnow habitat areas in ponds, streams and sloughs, and even the potential for
<br />an open water raceway hatchery These features would be supplied by some of the ten newly
<br />constructed wells and SPLRG /CDOW desire that some of the accretion credits be used to replace
<br />depletions associated with supplying water year round to these additional features As the following
<br />analysis shows, there are excess accretion credits to support these new activities along with providing
<br />augmentation waters for replacement of existing well depletions
<br />Summary of Water Year 2001 Operations
<br />The attached Tables 1, 2, 3 are the Water Commissioner (J T Hanrahan) Water Year 2001 records for
<br />Tamarack recharge well pumping through June 21, 2001 The ten wells permitted and approved through
<br />the prior Tamarack Substitute Water Supply Plans are all operational Permit numbers for these 10 wells
<br />are as follows Well 1, 47191F, Well 2, 49222F, Well 3, 53168F, Well 4, 53169F, Well 5, 50444F,
<br />Well 6,53336F, Well 7,53441F, Well 8,53538F, Well 9,53539F, and Well 10, 53540F Well l is
<br />part of Water Court Application Case No 96CW 1063 and Wells 2 through 10 are part of Water Court
<br />Application Case No 98CW463
<br />Table 1 is for Well Nos 1, 2, and 5 with a total acre -feet pumped of 2,897 acre -feet Table 2 is for Well
<br />Nos 4, 9, and 10 with a total acre -feet pumped of 1,153 acre -feet Table 3 is for Well Nos 3, 6 7,
<br />and 8 with a total acre -feet pumped of 777 acre -feet The total pumping for all ten wells for Water Year
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