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Mt: Peter Hays <br />Re: Sep Fer Pit, Adequacy Letter Response <br />August.1$ 2098 <br />Page:3 of 6 <br />5.: Please commit to provide the Division with. a copy of Town..of Windsor. Floodplain <br />Development Permit for the. SerFer Pit Project: <br />:..-Upon approval 'of the, Floodplain Development, Permit by the. Town of Windsor, a copy.. <br />. <br />will be submitted to the Division ofReelatnatign Mining anl5afety. <br />-6. Please commit to not, exposing groundwater until the well .:permit. and temporary <br />substitute water supply plan are obtained from the . SEO. Please commit to providing .the <br />Division with copies of the well permit and tefthporary substitute water supply plan once <br />approved.by.the State Engineers Office (SEO): <br />Connell Resources, Inc. will not expose.groundwater until the well permitgnd temporary <br />substitute, water supply plan are obtained from the State Engineer's. Off ce (SEO). -Copies <br />_of each wilt: be supplied to the. Division.of Reclamation Mining and Safety. upon approval . <br />from the SM..' <br />7.. The. applicant. states on page 4 of the Ser. er Pit, Groundwater. Monitoring Plan that <br />..baseline date will be collected from the piezometers on a monthly basis (collected prior to <br />dewatermg operations): Please commit .to, collecting and reporting five-(5) quarters.of <br />data prior. to starting dewafering operations. <br />Connell Resources, Inc, .will monitor, groundwater, elevations monthly in the established <br />monitoring wells. Ti igger points:if411 be based upon. the estimated groundwater depth as <br />well as actual observed groundwater depths identifled during the installation of the. <br />inonitoring.wells for this site. The trigger points will be set at. tv feet above or, below the <br />historic high or, loin elevations in each well., <br />Historical data. in the vicinity of the proposed site is:consistent with the, estimated depth <br />;. of 3:to:4 feet. According to the Su urface Exploration/Monitor Well Installation report <br />for, the Kyger Pit, located on the. northern boundary of the.SerFer Pit, groundwater <br />depths ranged f otn S to 10 feet..- The slight dif vrence in :groundwater height is to be <br />expected since the Setter Pit is located closer to the, Cache Ia Poudre ;River..: A copy. of <br />this report is. included as an attachment to this letter. <br />The property located on the eastern.border of the Kyger Pit and northeast of the SerFer. <br />Pit has three permitted 'iaells. on site. According to the' State. Engineer -Database, the <br />..:groundwater `depths .liege recorded as S feet, 6' feet, and 7 feet.: F'igitre..l; which is <br />attpched to:this letter, sho}vs the location.and.i•ecorded depth of these wells. <br />In order to protect against adverse effects on existinggrottndtivatei• conditions, the.trfgger <br />elevation for each:.mmnitoring well. will be trio feet above or below the elevation of the <br />observed and estimated level at each.well for. three consecutive months. It is important to <br />note that. the estimated level for the- site-is 3 to 4 feet Based-on.historicai data fi.om 1t,ells <br />that are in close proximity to the SerFer Pit, the groundwater elevation for the <br />southwestern.,tnonitoring well is expected to 'be approximately 3 feet below the sut face.