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Forrest Luke <br />Page 2 of 4 <br />17 April 2020 <br />All Rules referenced within this document are contained within the Regulations. <br />Rule: 2.05.3(6) Operational Plan <br />2020 February DRMS: DRMS finds the submitted revised pages address this rule adequately with <br />the exception of the following: <br />4. No overburden volumes nor swell factors were included in the Reclamation Plan <br />discussion on revised pages 3-15b and 3-15c. Please include this information in the <br />discussion. This is question 4 <br />Trapper Response: Overburden swell factors used at Trapper can be found on page 3-49 of Trapper's <br />permit. A discussion of the redisturbed spoils in A pit has been added to Section 3.1.5, page 3-15b and is <br />enclosed. <br />2020 March DRMS: DRMS finds Trappers response adequate and understands that the swell <br />factor for the redisturbed spoil is 10% compared with original swell of 25%. DRMS has <br />requested TMI's Agapito report. Once DRMS has the opportunity to assess stability conclusions <br />DRMS will proceed with volumetric verification. Thus adequacy question 4 remains <br />outstanding. <br />6a. Please provide updated profiles for any crossections affected by PMT changes, and specifically <br />crossection E142600. <br />2020 April DRMS: <br />DRMS finds Trappers response of 1 April adequate for post mining topography adequate. <br />2020 April 17 DRMS: <br />The Division deems it appropriate for the proposed operation to request any maps and associated <br />cross section drawings for the N Pit temporary spoil pile. Per Rule 2.05.3(6), if appropriate for <br />the proposed operations, each plan should include the subsections of Rule 2.05.3(6), including <br />Rule 2.05.3 (6)(b). The Division understands that the spoil is a temporary stricture and is requesting this <br />information for the Divisions analysis of stability, and volumetrics analysis for compliance with the above <br />stated rule. <br />(b) As proposed, spoil during the initial box cut for the proposedNighthawk Pit (N Pit) will be temporarily <br />placed "west and slightly above the pit" as stated under the proposed Section 3.5.4. Per this section of the <br />Rule, [djescriptions, including appropriate maps, prepared according to the standards of 2.10, and cross <br />section drawings, of the proposed disposal site and design of the spoil disposal structures according to <br />4.09. As proposed, no maps or designs have been included for the temporary spoil pile associated with the <br />N Pi. t. <br />DRMS ADQ 3 TR124 17 April 2020 <br />Prepared by: R. Reilley <br />