Laserfiche WebLink
STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866 -3567 <br />FAX: (303) 832 -8106 <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />SAFETY <br />RE: Greeley 35th Avenue Mine, DRMS File# M -1977 -036, Adequacy Review #3 <br />Amendment 01 <br />Dear Mrs. Hora, <br />The Division received your response to the 2 nd adequacy review for the Greeley 35 Avenue <br />Mine, DRMS File# M- 1977 -036 amendment application. There are still several issues that will <br />need to be addressed in order for the Division to approve the application. These items are <br />discussed below. Please remember the decision date for the amendment application is <br />December 31 2009. If you need more time to address these issues please request an <br />extension of the decision date. <br />Rule 6.4.6 Exhibit F — Reclamation Plan Map <br />1.) Page E -2 of the reclamation plan indicates slopes above the post mine water level will be <br />reclaimed to a 4H:1V (horizontal to vertical) ratio and slopes below the post mine water level <br />will not exceed a 3H:1V ratio. Given this commitment, there are several discrepancies on the <br />Reclamation Plan Map. For the West Pit and the two South Central Ponds, the majority of the <br />pit slopes are depicted with 3HAV reclaimed slopes from the bottom of the pit to the top of the <br />pit above the post mine water level. The southern pit slopes of the North Central Pit and the <br />eastern pit slopes of the Eastern Mining Cell are depicted to have 2.51-I:1V reclaimed slopes <br />above the post mine water level. Also, page 3 of the Reclamation Plan Map indicates the <br />typical pond slopes will be reclaimed to a 31-1:1V ratio for the entire length of the slope. Please <br />revise the maps to correspond to the proposed reclamation plan or revise the reclamation plan <br />to leave 31-1:1V slopes above the post mine water level. In either case, the slopes depicted for <br />the southern slopes of the North Central Pit and the eastern pit slopes of the Eastern Mining <br />Cell will need to be re -drawn to correspond to the proposed reclamation plan. <br />Office of <br />Mined Land'Reclamation <br />Denver • Grand Junction • Durango <br />Office of <br />Active and Inactive Mines <br />Bill Ritter, Jr. <br />Governor <br />Harris D. Sherman <br />Executive Director <br />December 15, 2009 <br />Ronald W. Cattany <br />Division Director <br />Natural Resource Trustee <br />Pamela Hora <br />Tetra Tech <br />1900 S. Sunset Street, Suite 1F <br />Longmont, Colorado 80501 <br />RE: Greeley 35th Avenue Mine, DRMS File# M -1977 -036, Adequacy Review #3 <br />Amendment 01 <br />Dear Mrs. Hora, <br />The Division received your response to the 2 nd adequacy review for the Greeley 35 Avenue <br />Mine, DRMS File# M- 1977 -036 amendment application. There are still several issues that will <br />need to be addressed in order for the Division to approve the application. These items are <br />discussed below. Please remember the decision date for the amendment application is <br />December 31 2009. If you need more time to address these issues please request an <br />extension of the decision date. <br />Rule 6.4.6 Exhibit F — Reclamation Plan Map <br />1.) Page E -2 of the reclamation plan indicates slopes above the post mine water level will be <br />reclaimed to a 4H:1V (horizontal to vertical) ratio and slopes below the post mine water level <br />will not exceed a 3H:1V ratio. Given this commitment, there are several discrepancies on the <br />Reclamation Plan Map. For the West Pit and the two South Central Ponds, the majority of the <br />pit slopes are depicted with 3HAV reclaimed slopes from the bottom of the pit to the top of the <br />pit above the post mine water level. The southern pit slopes of the North Central Pit and the <br />eastern pit slopes of the Eastern Mining Cell are depicted to have 2.51-I:1V reclaimed slopes <br />above the post mine water level. Also, page 3 of the Reclamation Plan Map indicates the <br />typical pond slopes will be reclaimed to a 31-1:1V ratio for the entire length of the slope. Please <br />revise the maps to correspond to the proposed reclamation plan or revise the reclamation plan <br />to leave 31-1:1V slopes above the post mine water level. In either case, the slopes depicted for <br />the southern slopes of the North Central Pit and the eastern pit slopes of the Eastern Mining <br />Cell will need to be re -drawn to correspond to the proposed reclamation plan. <br />Office of <br />Mined Land'Reclamation <br />Denver • Grand Junction • Durango <br />Office of <br />Active and Inactive Mines <br />