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SOIL ANALYSIS & PEPORTIN13 ( PEACOLATION REPORTS ' FOUNDATION DESISN I SEPTIC oEsISN <br />STRUCTURAL DESIGN I STRUCTURAL PLAN CHECK f RESIDENTIAL HOME DESIGN <br />HOME INSPECTIONS CONSTRUCTION INSPECTIONS ' PROFESSIONAL CONSULTATION <br />EXPERT TESTIMCNY ' LAND DEVELOPMENT PLANS I MATERIAL TESTING <br />CONSULTANTS <br />VISION I INNOVATION RESULTS <br />JUNE 27, 2009 <br />JOB NUMBER: 091-0116 <br />130YD ASTEMBORSKI <br />1220 WINDMILL AVE. <br />COLORADO SPRINGS, CO 80907 <br />RE: SITE INVESTIGATION - PROPOSED OPEN PIT MINE, Sl/2S'/4 OF SECTION 33, T9S, R77W OF THE 6TH <br />PM, FAIRPLAY, PARK COUNTY, CO <br />Deaf- Boyd, <br />At your request, i performed a site visit at the above mentioned address to determine if the proposed <br />open pit mining operations would impact surrounding Properties, to include a paved county road <br />bordering the north property line of this parcel of land and several residential properties adjacent to this <br />roadway. My analysis included a comprehensive site visit and review of previous geologic borings in the <br />area. The soils are Predominately glacial alluvium placers, silty sands interbedded with large round rock <br />and cobble structures. <br />Sidewall stability of these soil structures is relatively good, provided overburden pressures are *•,;n;n,;,Pd. <br />The most influential of these pressures are excessive moisture content of the embankment soils and good <br />grading and drainage operations are in place to prevent saturating the soil embankment and controlling <br />the spoils. It is recommended that daily inspections on operational areas are done by the pit foremen and <br />any hazards that are identified are immediately reported, Comprehensive monthly inspections of all areas <br />in and around the pit should be accomplished by site safety personnel. <br />I have attached a detail which illustrates the proposed operation at this site. The following elements are <br />critical to ensuring cut-slope stability: <br />- Maintaining setbacks from property lines and spoil rows <br />Controlling surface water runoff <br />- Controlling ground-water, if encountered <br />- Ensuring spoil rows do not exceed maximum dimensions <br />In conclusion, it is my opinion that the operation of an open pit mine at this location can be effectively <br />conducted without impacting surrounding properties. Strict adherence to spoil placement and safety <br />inspections will ensure a safe and stable embankment. <br />We appreciate this opportunity to serve you. Please do not hesitate to contact this office if you have any <br />questions. - - <br />Sincerely, 0 RE <br />Erik D. Mitchell, P.E. <br />`S'sic;IvaLE? <br />7 7 9 . 6 8 7 . 2 4 4 7 ( W W W. A E G- C. C O M <br />400 W. MIDLAND AVE., STE. 1 1 0 ( P.O. @OX 5307 1 WOODLAND PARK. COLORADO 801966