Laserfiche WebLink
Page 2 of 2 <br /> which now reads"...resulted in a minimum non-circular FS of 2.8...." Based on the included figure and table <br /> this appears to be a circular failure surface. <br /> The second item requiring clarification is the inventory of faults utilized for the PSHA. The PSHA calls out the <br /> nearby Mosquito Fault, in addition to the Gore Range Frontal and Sawatch Faults as the largest contributors to the <br /> hazard to the 5 Dam TSF; however no mention is made of the Tenmile,Kokomo,or Mayflower faults which are <br /> shown by the USGS geologic map to directly underlie(or very nearly) the TSF structures. Were these other <br /> named faults, as well the number of unnamed faults shown in the area of the TSF,evaluated for their <br /> contributions to the overall seismic hazard as part of the PSHA? <br /> This concludes the Division's second adequacy review of TR23. This letter shall not be construed to mean that there <br /> are no other technical issues in the submittal. Other issues may arise as additional information is supplied. As stated <br /> previously,DRMS is committed to working with Climax to implement a"best available practice"approach for the <br /> TSFs at this site that will allow mining to continue while implementing all reasonable protections in compliance <br /> with DRMS rules. As stated previously,DRMS is open to additional meetings with Climax if it would be useful to <br /> help resolve any remaining issues. <br /> If you have any questions,please contact me at(303) 866-3567 x8140. <br /> Sincerely, <br /> Eric Scott <br /> Environmental Protection Specialist <br /> cc: Bill McCormick <br /> Division of Water Resources—Dam Safety Branch <br /> 7405 US Hwy 50 <br /> Salida CO 81201 <br />