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.• ~ STATE OF COLORADO • ISION OF MINERALS AND GEOLOGY ,~yry~ arimem of Natural Resources /1 er~ G~V~S "" S 7 Sherman 51., Room 21 5 J Y` ~/ _ J ~-p JI~ ver, Colorado 80203 ~'(/ I ne: 1303) 8663567 IA/~ 13031 832-8106 ~ S DEPARTMENT OF To: i entGorham MEMORAho~ From: anet H. Binns Subject: Lorencito Mine, I , 1997 Adequacy Response Roy Romer Governor Date: July 25, 1997 lames 5. Lochhead Executive Director I have com leted m review of Lorencito Coal Com an s res onses to the Division's Michael B. Long P Y P Y P Division Director adequacy letter dated May 27, 1997. Outstanding items of concern that I reviewed were in relation to adequacy concerns No. 57,59,190, 191, 192, and 195. Responses regarding reclamation liability estimates are still being considered. Revised page No. that were reviewed include Pages 2.04-44, 2.04-45, 2.04-49, 2.04-50, 2.04-51, Map 2.04.10- I , 2.05-33, 2.05-33a, 2.05-33b, 2.05-34, 2.05-35, 2.05-59, 2.05-59a, 2.05-61, 2.05-66, 2.05-66a, 2.05-71, 2.05-73, 2.05-73a, 2.05-80, Map 2.05.3-3e, and Exhibit 10 pg. 5 & 7. 57) Lorencito Coal Company revised page 2.04-45 to commit to sampling the mountain • shrub and Pinyon/uniper communities prior to conducting any Mine related disturbances in these vegetation types. This response is appropriate. 59) Page 2.05-71 was revised to eliminate the last statement on the page as requested. 192) Page 2.05-73 has been revised to describe the methods employed in baseline woody plant density data collection and how this data will be collected at reclamation success determination. This response is appropriate. 195) Lorencito Coal Company revised Table 2.05.4-2, Seed Mixture for the Grassland Community, to incorporate additional warm season grass species. The species included are appropriately adapted and palatable for the post-mining land use. These three species are small seeded so the resulting small overall quantities of seed, 0. I - 0.2 pounds seed /acre results in a signifcant increase in the number of PLS/Fiz. The nature of many of the warm season grass species finds that the seed may remain dormant in the ground years after seeding. Therefore this apparently high seeding rate would not be detrimental. Of small note Sporobo/us airoides was misspelled on page 2.05-66. Items no. 190 and 191 involve re-establishment of shrubs and determination of Woody Plant Density (WPD) success. This item was not addresses in Lorencito Coal Company's July I , • 1997 submittal. This item remains outstanding. The Division will attach a stipulation to the permit to resolve the shrub establishment success criteria. ^ <,..