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Leonard Rice Cons'dlting Water Engineers, Inc. HLeonard <br /> arodf B'shop <br /> (303)455-9519/ 2785 Norlfi Speer Boulel/ard l Denver,Colorado 8M 1 Marianne McGoniane <br /> w, <br /> - - OFFICES IN , <br /> * > Denver,Colorado. i <br /> Albuquerque,N.N. <br /> June 24, 1974 <br /> Mr. *.Robert Brand <br /> Rocky Mountain Consulting Engineers, Inc. <br /> 1775 North 'lain Street <br /> Longmont, �oicrado 80501 <br /> Dear Bob: <br /> In our meeting with you and Mr. Milt Nelson on June 21, 1974 <br /> in Flatiron's offices in Boulder , a plan for mining a por- <br /> tion of Mr. Milt Nelsons property for gravel was discussed. <br /> The purpose of this letter is to outline a Plan of Augmenta- <br /> tion to insure Boulder Creek water users are adequately <br /> protected from injury by the operation. Mr. Nelson's land <br /> is in Sections 20, 29 and 30, Township 2N, Range 68W of Weld <br /> County, Colorado. It is adjacent to Boulder Creek in Water <br /> District No. 6 , Division 1 . <br /> The water evaluation is based on available data of precip- <br /> itation in Boulder and evaporation recorded at Fort Collins, <br /> discussions with Mr. Nelson, a site visit of the property <br /> irrigated by the ditch, and a review of data on file at the <br /> State Engineer 's office. <br /> The gravel mining operation is discussed in separate docu- <br /> mentation provided by the Flatiron Sand & Gravel Company. <br /> Briefly, it envisions a three-stage development in which <br /> three areas will be mined for gravel. The first area consists <br /> of approximately 51 acres of which a pond of approximately 38 . 5 <br /> acres will be formed from the resulting mining operation. <br /> The second mining area is 49 acres , of which a pond of 32. 2 <br /> acres will be formed. A possible third site is located still <br /> further south and will be approximately 35 acres, with a <br /> resulting pond of 21 . 6 acres. Due to the phased development of <br /> the mining plan, the water-related aspects have also been <br /> = phased to conform with the gravel operation. <br /> The process of mining gravel from the area will result in open <br /> bodies of water which were not in existence prior to the mining <br /> operation. The basic goal of this Plan of Augmentation is to <br /> ensure that the historic pattern of operation is not changed <br /> due to the mining operation. This is accomplished by balancing <br /> the before and after water use . Irrigation water is taken from <br /> the Godding , Daily and Plumb Ditch and will be returned, as it <br /> 1 <br /> Hydrology <br /> Water Rights <br /> Environmental Analysis <br /> Urban Drainage <br />