REV102795 - Laserfiche WebLink

Home Browse Search

iii iiiiiiiiuiii iii 999 STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Department 0l NaWr31 Resources 1313 Sherman 51., Room Z1 S Uenyer, Colorado BO?03 I'hone~ (3011 866-3 56 7 FAY: (303) 87?-8106 MEMO To: Kent Gorham From: Jane[ H. Binns Subject: Lorencito Cany ine -96-084 TR-02 Date: i March 5, 1998 ~~I6~ DEPAR]'MENT OF NATURAL RESOURCES Roy Romer Grnernor Limes 5. Lochhead rnecun.e L~nec~e, AL~hael B. Long Dmicion Director 1 have reviewed Lorencito Coal Company's revised pages; 2.05-59a, 2.05-60, 2.05-666, 2.05-66c, 2.05- 66d, 2.05-73, 2.05-73a, 2.05-74, 2.05-75 and Figure 2.05.5-19a. Technical Revision No. 2 was submitted in response to Stipulation No. I I to the permit. Stipulation No.l 1 required that Lorencito Coal Company incorporate a shrub establishment plan addressing concerns [he Colorado Division of Wildlife and the Division of Minerals and Geology identified in the original permit review. Lorencito Coal Company appears to have incorporated the majority of the CDOW's recommendations identified in the Division's letter dated June 5, 1997. These recommendations include locating concentrated shrub plots; near undisturbed edges, in drainages, with North vs. South aspect, flat vs. steep slopes, with proximity to water, and relate the type of shrub used to the area of establishment. Lorencito Coal Company has proposed a combination of mature transplant shrub "islands' and strip seeded shrub plots. Lorencito Coal Company appears to have placed shrub plots based upon aspect, topography, drainage Icxation, and closeness of "edge." Species chosen for the strip seeded plots are appropriate and representative of local species. Several items that require correction or clarification by Lorencito Coal Company include: 1 hz pagination of revised pages 2.05-666 and 2.05-66d seem incompatible with the approved permit pagination. The Division believes that revised page 2.05-666 needs to be numbered " 2.05- 65a" to allow for proper insertion into the permit. Likewise, revised page 2.05-66d should be renumbered "2.05-666." Please revise the page numbers as appropriate. 2. Revised page 2.05-666 (rev. February 13, 1998) describes hydroseeding the shrub seed mix on steeper slopes. How would hydroseeding fit with strip seeding? Would the grass/forb mix be combined in the hydroseeder with the shrub mix? Would hydromulching be conducted on hydroseeded areas and would it be carried out as a separate step? Please give additional information should hydroseeding be considered fur seeding of steeper slopes. 3. Clarification is needed in Lorencito Coal Company's discussion of sampling methods for determining vegetation success, found on pages 2.0>-73 and 2.05-73a. It is unclear if [he strip seeded shrub plots (seed mix Table 2.05.4-2 and 2.05.4-2a) will be sampled distinct from reclaimed areas seeded solely with [he Seed Mix shown in Table 2.05.4-2. Approved page 2.05-