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C).' fi?. <br />,/"F,7V- RPM, Inc. <br />RECEN <br />11AX 10 2011 <br />Di,Asisin of Reclamation, <br />R$:ning and SaMy <br />May 26, 2011 <br />? ?C, 10 5?, <br />RECEDED <br />MAY U 2 2011 <br />GMW JUNCTION FIELD OFFICE <br />RECLAMAT ON MINING NF& SAFM <br />,/bivision of Reclamation, Mining and Safety <br />Attn: Mr. Dustin Czapla <br />101 South 3rd, Suite 301 <br />Grand Junction, CO 81501 <br />RE: Resolution of the Brown's complaint concerning the Bettger Pit Amendment, File No. M <br />1976-051 <br />Dear Mr. Czapla: <br />Previously, I provided the DRMS a document titled, "What Coloradoans Need to Know about <br />Water Well Construction". That document emphasized a yield of a domestic household water <br />well is related to the estimated needs of a specific household and the ability of the well to deliver <br />the need over a 24 hour period. For example, a household of four individuals (assumes a two <br />bedroom house and therefore four individuals) requires the well to deliver 300 gallons of water <br />per day. (The standard used in the above referenced document is 75 gallons per day per <br />individual.) <br />The aquifer in question is a 3 foot thick gravel deposit, of low-yield. From the above cited <br />document, wells completed in low-yield aquifers are considered satisfactory if they are able to <br />provide the needs of the specified household through pumping and storage over a 24 hour period. <br />For example: <br />Well Yield Rate Over 24 <br />Hrs. Gallons Produced Over 24 <br />Hour Period Time Needed to Meet the <br />Water Needs of a Two <br />Bedroom House, Four <br />Individuals 300 gallons) <br />4.0 Gallons per minute 5760 1.25 hrs <br />3.0 Gallons per minute 4200 1.7 hrs <br />2.0 Gallons per minute 2880 2.5 hrs <br />1.0 Gallons per minute 1440 5.0 hrs <br />Therefore, we suggest the well test be run for any of the above time periods at a pumping rate <br />analogous to the corresponding yield. We maintain meeting any of the above rates producing <br />300 gallons in any one 24 hour period is adequate to meet the needs of a four person household. <br />This should demonstrate Duckels Construction has minimized impacts to the hydrologic balance <br />as to water quantity, the test required by the Act and regulations, for DRMS permitting <br />requirements. If 300 gallons in a 24 hour period can be satisfied, then the use of the aquifer by <br />the Brown's has not been injured. <br />RPM lne., 7425 Winter 13eri,v Lm, Castle Rack, CO 80108 Phone: (303) 854-7499 FAX; 303) 660-3852 Email: hlhmT?phriea2'a?cr?mcxxta?et