Laserfiche WebLink
r ~~~ II~I~~~~~III~I~~ <br />SHEPHERD MILLER <br />RECEIVED <br />October 7, 1999 OC.~ O 7 SMI #100267 <br />1999 <br />~' ~r Minerab 8 Geology <br />Mr. James Dillie <br />Colorado Division of Minerals & Geology <br />1313 Sherman, Room 215 <br />Denver, Colorado 80203 <br />Subject: West Pit Water Management at the San Luis Project <br />Deaz Mr. Dillie: <br />Enclosed is a design drawing for the installation of a pipeline from the holding pond at the West <br />Pit Evaporation Area to the tailing pond at the San Luis Project in Costilla County, Colorado <br />prepared for Battle Mountain Resources, Inc (BMR[). The following is a summary of the design <br />details for the pipeline. <br />The pipeline will consist of 6-inch diameter HDPE SDR 17 pipe buried a minimum of 6 feet <br />below ground surface for freeze protection. The plan view and profile alignment of the pipeline <br />is shown on the attached drawing. Aself-primer centrifugal pump (60 hp -Power Prime) will <br />pump water from the holding pond to the tailings pond at a dischazge rate of approximately 250 <br />gpm and a dynamic head of approximately 95 feet (40 psi). The pipeline will stub-out from the <br />existing pipe that feeds the existing evaporator blowers at the evaporation area. The connection <br />will be configured so that the pipeline will drain back into the holding pond as shown on the <br />drawing. The pipeline is approximately 2.75 miles long with two relative low points and two <br />relative high points along the profile as shown on the attached drawing. An emergency drain <br />will be installed at the lowest point of the pipeline so that the pipeline can be drained into water <br />trucks if the need arises. BMRI would notify the DMG prior to draining the pipeline. Two <br />combination air/vacuum valves will be installed at the high points to alleviate pressure on the <br />pipe during filling and prevent collapse during draining. The pipeline will opBrate only as a <br />backup for the water management system. <br />If you have questions, please contact me at 970-223-9600 or Mr. Ron Zumwalt of BMRI at 719- <br />672-4122. <br />Enuironmrnta! d' Enginrrring Conmltanrr <br />3801 Automation Way, Suite 100 <br />Fort Collins, CO 80525 <br />Phone: (970)223-9600 <br />Fax: (970) 223-7171 <br />www.shepmill.com <br />