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O �L 0 R A D 0 Division of Reclamation, too r, Mining and Safety Department of Natural Resources 11)einveir, CO 80203 February 2, 2021 Steve O'Brian Environment, Inc. 7985 Vance Dr.#205A Arvada Co, 80003 RE: WSG-Hribar Pit, M-2009027, Amendment 01,Adequacy Review Dear Mr. O'Brian, The Colorado Division of Reclamation, Mining, and Safety ("'DRIVIS" or "Division"), received the above referenced application on December 07, 2020. The application was deemed complete and filed for review on December 21, 2020. The Division is required to issue a decision on the application by March 221 2021. The following adequacy review items will need to be addressed prior to the Division's approval of the application: 6.4.4 EXHIBIT D - Mining Plan 1. On page 7 it states "soil covering gravel averages 0 to 8 inches deep", however on page 8 it states "0 to 7 inches". Please provide a statement clarifing the depth of topsoil on site. 2. Is there a secondary commodity that will be mined? If not please provide a statement to this effect. 3. Does the Operator anticipate using explosives? If not please provide the necessary information required by Rule 6.4.4(i). 6.4.5 EXHIBIT E— Reclamation plan 4. On page 7 it is stated that there is currently 28,100 cubic yards of topsoil available. This amount is not enough to cover the entire 41.74 disturbed acres with eight inches of topsoil. For the remaining topsoil required, the Operator can do one of two things; provide a list of what additives/amendments will be used in the overburden to make it a suitable growth medium based upon a soil analysis or; The Operator may demonstrate that the overburden is of sufficient quality for use as a growth medium. 5. Will there be enough overburden to grade all slopes to a 3H:1V and provide enough cover material for topsoil, with a growth medium. Please provide a site wide estimate and if there is 1313 �h irim in t.ir IlRoo215, Denver,ver III .3 �- III,,,. m . 1 Ih-t-t ://ism-i in-i in . -t -t w ®u Jaired IlPoliGovernor 9 Dain Gibbs,P Executive Director Virginia IB it in in inY Iairectoir � h ak o o- ✓' ^ kFab m k;l;