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JWPROWS RS <br /> AGGREGATE <br /> OPERATORS <br /> 9485 County Road HH .5,P.O.Box 965 <br /> Lamar,CO 81052 <br /> Phone (719)688-4477 <br /> Barr H. Inman <br /> 1105 E. Maple St. <br /> Lamar, CO 81052 <br /> Aug. 23, 2018 <br /> Re: Agreement for Compensation for Damage to Structures within 200 feet of mining <br /> activities <br /> To Whom It May Concern: <br /> Prowers Aggregate Operators, LLC has applied for an amendment to their current State <br /> of Colorado Division of Reclamation, Mining, and Safety (DRMS) Reclamation Permit <br /> M2008-078 to allow sand and gravel mining on property within 200 feet of structures <br /> located on your property. The Colorado Mined Land Reclamation Act provides <br /> protection for your property, and specific protection for your structures located within <br /> 200 feet of the mining activities. <br /> DRMS Permit approval requires a notarized agreement between the applicant and <br /> owners of structures within 200 feet of the mining activities, providing compensation for <br /> any damage to the structure; or preparation of an engineering evaluation acceptable to <br /> the DRMS, demonstrating that such structure(s) shall not be damaged by the mining <br /> activities if an agreement cannot be reached. <br /> Prowers Aggregate Operators, LLC has had an engineering evaluation performed to <br /> determine acceptable setbacks from their proposed mining permit boundary and mining <br /> limit to structures adjacent to the mining. The proposed mining slopes and setbacks <br /> were analyzed using the SlopeW computer program. SlopeW was designed to analyze <br /> the slope stability of earth embankments subjected to several critical situations that may <br /> occur during the life of the embankment. The procedure searches for circular shear <br /> failures and automatically searches for the lowest safety factor. The required minimum <br /> safety factors are based on the current standards used by the Colorado State <br /> Engineer's Office (SEO) for high hazard embankment dams, and industry accepted <br /> standards for the evaluation of embankments during construction. The safety factors <br /> attained using the setbacks shown on the Mining Plan are greater than the required <br /> safety factors specified by the SEO for an earth embankment during construction, and <br /> an earth embankment subjected to earthquake loading, based on the United States <br /> Geological Survey earthquake peak acceleration factors for the area. This evaluation <br /> indicated that damage to structures adjacent to the mining should not occur, even <br /> during earthquake conditions, which are very unlikely to be present. <br />