Laserfiche WebLink
City of Greeley <br /> Community Development <br /> 1100 10th St., Suite 202 <br /> Greeley, CO 80631 <br /> • <br /> January 26, 2024 <br /> Re: Agreement for Compensation for Damage to Structures within 200 feet of mining <br /> activities <br /> To Whom It May Concern: <br /> W.W. Clyde & Co. (formerly IHC Scott) is the new operator of the former Broken Arrow <br /> Investments, LLC Derr Pit. W.W. Clyde & Co. are in the process of doing a succession of <br /> operator with the State of Colorado Division of Reclamation, Mining and Safety. One of the <br /> requirements for the succession of operator is to send out structure agreements for structure <br /> owners that are within 200 feet of the mining permit boundary. The State of Colorado Division of <br /> Reclamation, Mining, and Safety(DRMS) Reclamation Permit for the Derr Pit is M2008-078. <br /> The Colorado Mined Land Reclamation Act provides protection for your property, and specific <br /> protection for your structures located within 200 feet of the mining activities. Your property is <br /> adjacent to the mine property and within 200 feet of the mining activities. <br /> DRMS approval requires a notarized agreement between the applicant and owners of structures <br /> within 200 feet of the mining activities, providing compensation for anydamage_to the structure; <br /> or preparation of an engineering evaluation acceptable to the DRMS., demonstrating that such <br /> structure(s)shall not be damaged by the mining activities if an agreement cannot be reached. <br /> _ W.W. Clyde &_Co. has had an engineering evaluation performe4 to determine acceptable= <br /> setbacks from their mining permit boundary and mining limit to structures adjacent to the mining. <br /> The proposed mining slopes and setbacks were analyzed usirig:the;Galena v7.1 computer <br /> program. Galena was designed to analyze the slope stability of earth embankments subjected <br /> to several critical situations that may occur during the life of the embankment.The procedure <br /> searches for circular shear failures and automatically searches for the lowest safety factor. <br /> 5,000 separate failure surfaces were analyzed for each case.The required minimum safety <br /> factors are based on the current standards used by the Colorado State Engineer's Office (SEO) <br /> for high hazard embankment dams, and industry accepted standards for the evaluation of <br /> embankments during construction.The safety factors attained using the setbacks shown on the <br /> Mining Plan are greater than the required safety factors specified by the SEO for an earth <br /> embankment during construction, and an earth embankment subjected to earthquake loading, <br /> based on the United States Geological Survey earthquake peak acceleration factors for the <br /> area. This evaluation indicated that damage to structures adjacent to the mining should not <br /> occur, even during earthquake conditions, which are very unlikely to be present. <br /> 10303 EAST DRY GREEK ROAD, SUITE 300 1 ENGLEWOOD,COLORADO 80112 1 WWGLYOE,NET 1 303.790.9100 <br />