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August 26, 2013 <br />Weld County <br />Planning and Building Services <br />918 10th Street <br />Greeley, Colorado 80631 <br />RECEIVED <br />SEP 10 2013 <br />ly-eld GREY r,dnnin <br />EL�y OF., aft`W <br />Re: Agreement for Compensation for Damage to Structures within 200 feet of <br />mining activities <br />To Whom It May Concern: <br />Loloff Construction, Inc. has a Weld County (County) Use by Special Review Permit <br />AMUSR- 690, and a State of Colorado Division of Reclamation, Mining, and Safety <br />(DRMS) Reclamation Permit M1985 -112 to allow sand and gravel mining on property <br />within 200 feet of structures located on your property. The Colorado Mined Land <br />Reclamation Act provides protection for your property, and specific protection for <br />your structures located within 200 feet of the mining activities. <br />DRMS Permit requires a notarized agreement between the permit holder and owners <br />of structures within 200 feet, providing compensation for any damage to the structure; <br />or preparation of an engineering evaluation acceptable to the DRMS, demonstrating <br />that such structures shall not be damaged by the mining activities if an agreement <br />cannot be reached. <br />Loloff Construction, Inc. has had an engineering evaluation performed to determine <br />acceptable setbacks from their proposed mining permit boundary and mining limit to <br />structures adjacent to the mining. The proposed mining slopes and setbacks were <br />analyzed using the XSTABL v5.105a computer program. XSTABL was designed to <br />analyze the slope stability of earth embankments subjected to several critical <br />situations that may occur during the life of the embankment. The procedure searches <br />for circular shear failures and automatically searches for the lowest safety factor. <br />2,000 separate failure surfaces were analyzed for each case. 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 attached Mining Plan are greater than the <br />required safety factors specified by the SEO for an earth embankment during <br />construction, and an earth embankment subjected to earthquake loading, based on <br />the United States Geological Survey earthquake peak acceleration factors for the <br />area. This evaluation indicates that damage to structures adjacent to the mining <br />should not occur, even during earthquake conditions, which are very unlikelv to be <br />present. <br />2013 -2861 <br />Loloff Construction, Inc. P.O. Box 518 Kersey, Colorado 80644 <br />