Laserfiche WebLink
To. DRMS Den Page 2 of 10 2017-12-08 22:31.10(GMT) 13032008630 From Greg Lewicki <br /> • <br /> 3375 West #ow& `i Circle Listiciott, CO t" O 1 23 <br /> November 29, 2017 <br /> Michael Cunningham <br /> Colorado Division of Reclamation,Mining, and Safety <br /> 1313 Sherman St, Room 215 <br /> Denver, CO 80203 <br /> RE: Detroit City Mine; DRMS File No. M-2017-003—Waste Rock Sample#2 <br /> Dear Mr. Cunningham <br /> Colorado Calumet Co,Inc. has conducted an early tunnel rock sampling and lab testing as it <br /> continues development of the access tunnel at Detroit City Mine. This sample was taken roughly <br /> 200 feet in„ The results of the whole rock analysis and acid-base accounting(ABA) are attached. <br /> As the Division can see, this sample shows acid-base potential at greater than 17 I CaCO3ikT. <br /> The location of this sample is further into the mine than the previous sample, and reflects the <br /> geologic conditions that were anticipated. Future samples are expected to be similar. The next <br /> rock sample will be the blast conducted roughly another 100 feet in. <br /> Please contact me if you have any further questions or concerns. <br /> Sincerely, <br /> V/4:7 <br /> Ben Langenfeld,P.L. <br /> Greg Lewicki and Associates <br /> Detroit City Mine _..°` ,�.:..,._ 'r .r:._'_`'.•........ <br />