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�II II�II� I�II I �I� <br /> • i <br /> Gilbert F. Rindahl, P.E. <br /> 999 <br /> C.Jay Silvernale <br /> Bruce G. Rindahl <br /> Rindahl& Associates 2305 S.Syracuse Way • Suite 217 Denver,CO 80231 (303) 696-6946 <br /> July 22, 1985 Q1'.jL ti <br /> 11NEOLANO RMAItl�AW1 <br /> Mr. David Berry .air, VC 1t.Wht8f3i Ra30::!Ce" <br /> Mined Land Reclamation Division <br /> 423 Centennial Building <br /> 1313 Sherman Street <br /> Denver, Colorado 80203 <br /> RE: Varra Companies, Inc. - Amendment; File No. M-74-52 <br /> Dear David: <br /> The following is additional information to the adequacy <br /> response letter submitted July 18, 19B5. <br /> The 100 foot setback from the St. Vrain Creek to the top of <br /> the shoreline, where the 3H:1V slope begins, will remain <br /> cp 1.ndisturbed. <br /> A new plan to insure no damage to the cottonwoods will be <br /> implemented. A monitor well will be installed within the 100 <br /> foot setback area, near a clump of cottonwoods, to gain a <br /> representative sample of any water fluctuation which may be a <br /> result of dewatering operations. <br /> This one well will be used to represent the entire dewatering <br /> operation. If the recorded data indicates irrigating is <br /> necessary when dewatering within that area, then the other areas <br /> of the 100 foot, setback will also be watered when dewatering <br /> takes place in those areas. This one well will be representative <br /> for the entire operation rather than installing several wells and <br /> creating more disturbance within the 100 foot setback area. <br /> By the time dewatering rears the St. Vrain Creek, sufficient <br /> monitoring data will be available to determine whether water <br /> fluctuations will be caused by mining operations. <br /> t•• : <br /> , <br /> ��,� Engineering&Environmental Services A •' <br />