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objcc~•G+r, le~lw- <br />~~~ <br />Ms. Kate Pickford <br />Division of Minerals and Geology <br />North Minerals Supervisor <br />1313 Sherman St. Suite 215 <br />Denver Colorado 80203 <br />Re: Platte Sand & Gravel LLC S&H Mine <br />~1LR$ Permit # 2000-158 <br />Technical Revision <br />Deaz Kate: <br />RECEIVED <br />JUL 13 20Q4 <br />Divisroa atMinerals and OasloaP <br />This letter is notice of objection to the amendment that has been filed with your <br />off ce. This amendment is asking to change the method of extraction from WET mining <br />to DRY mining. This would be a MAJOR change and could have a dramatic effect to the <br />current water tables in the surrounding properties. Currently there is an agreement with <br />adjacent property owners to protect their wells against the loss of water. There is also a <br />requirement to install 44001f. of rechazge channel with monitoring wells. To date <br />neither the channel or the wells have been constructed even though there has been an <br />excavation exposing ground water to evaporation for almost a yeaz. <br />My questions and concerns with a slung wall aze: <br />Who will install the wall? <br />Who inspects the installation? <br />Will there be monitoring wells? <br />Has there been an investigation at the actual wal] location to establish the depth of the <br />wall for 3 ft, penetration into the shale? <br />How do you test a slurry wall to know it has completely sealed out all surrounding <br />ground water? <br />Wiil the surrounding property owners have time to address concems after the hearing as <br />we do not have all the information? <br />What happens to the current agreement with property owners? <br />With these and other questions still unanswered we I would ask the Division to deny the <br />amendment. <br />Sincerely, <br />U~"'1- I <br />Stanley Odenbaugh <br />11100 WCR 38 <br />Platteville Colorado 80651 <br />