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WATER RESOURr"-''~'""^''LTANTS, LLC <br />999 <br />July 20, 2000 <br />Mr. Kent Crofts <br />IME <br />POB 270 <br />Yampa, CO 80483 <br />RE: Proposed Camilletti Milner Pit No. 2 <br />Opinion of Impact of the Piton Streamflows in the Yampa River and Trout Creek <br />Dear Kent, <br />As requested I am providing an opinion regarding the impact the proposed Camilletti Milner Pit <br />No. 2 may have on the adjacent Yampa River and Trout Creek. <br />In summary, it is my opinion that the mining operation will have no noticeable impact on either <br />the Yampa River or Trout Creek. <br />BACKGROUND <br />• The Camilletti Milner Pit No. 2 is a proposed gravel and aggregate mining operation. It is <br />located on the south bank of the Yampa river immediately south of Milner, Colorado (Figure <br />1). Trout Creek, which is much smaller than the Yampa River, runs along the south side of the <br />property. <br />The ability of a gravel bed to cant' water depends on several factors. Namely, the slope of the <br />land and the transmissivity, or water producing capacity, of the soils dilate how much water <br />can move through a particular soil. However, the flow of water is likely very, very small. <br />Currently the topography and surface geology is such that very minor amounts of water may <br />flow underground from the Yampa River towards Trout Creek. The topography appears to be <br />nearly flat with a minimal slope of approximately one-tenth of one percent (0.1%) from the <br />Yampa River towards Trout Creek. The au~cial geology is favorable to some limited <br />movement of water, as it is composed of alluvial gravels which typically have enough open <br />spaces, or porosity, in them to allow water to move slowly through the silts, sands and gravels. <br /> <br />244 Hutton Ave., Rifle, CO 81650 PH /Fax (970) 62x5433 pcunier@bwn.net <br />