2020-01-09_REVISION - M1977211

• Permit No: M1977211
• IBM Index Class Name: Revision
• Doc Date: 1/9/2020
• Doc Name: Adequacy Review Response #2
• From: Continental Materials Corporation
• To: DRMS
• Type & Sequence: AM4
• Email Name: TC1
• Media Type: D
• Archive: No

cmcCONTINENTAL MATERIALS CORPORATION
our original comment requested frequency criteria for both monitoring and reporting. Please commit to
all three types of monitoring and provide a frequency for each type of monitoring and commit to
reporting monitoring results to the DRMS quarterly for the first year. The DRMS will determine after the
first year of monitoring if the reporting frequency can be reduced.
Response: The text in Exhibit D has been revised to include monitoring using drones and reporting.
6.4.5 EXHIBIT E—Reclamation Plan
12.Topsoil Importation:The DRMS accepts your commitment to import and stockpile the additional
57,000 CY of growth media in 2020 for final reclamation. Please be aware the DRMS will need to hold a
bond for the importation of this growth media until a sufficient quantity is stockpiled on site.
The response requires additional clarification on the topsoil volume necessary for reclamation. Based on
the DRMS December 5, 2019 site inspection and a subsequent meeting with Pikeview personnel in
Denver on December 13, 2019,The DRMS understands additional area just north of the maintenance
shop and within the permit boundary is to be affected area. Will the new area be net neutral for topsoil
needs (i.e., will topsoil be stripped from this area prior to excavating borrow material, then replacing the
stripped topsoil) or will additional growth media need to be imported?
Response: Exhibit E has been revised with updated topsoil volumes.Topsoil from the increased
disturbance area will be salvaged and used for reclamation. The reclamation plan requires 56,000 cubic
yards of topsoil/growth media, which are currently not available onsite. Castle has included costs in
Exhibit L for mixing mulch with soil onsite to create the growth media.
6.4.6 EXHIBIT F—Reclamation Plan Map
15. Revegetation:The response requires an update. Based on the DRMS December 5, 2019 site
inspection and a subsequent meeting with Pikeview personnel in Denver on December 13, 2019,The
DRMS understands additional area just north of the maintenance shop and within the permit boundary
is to be affected area. Please update and resubmit Exhibit L, Worksheets No. 3 and No. 14A accordingly.
Response: See response to comment 6. Exhibit L has been revised to include the revised borrow
volumes and disturbance area.
6.4.6 EXHIBIT G—Water Information
17. Drainage Features: The response requires additional clarification. Some of the various drainage
features discussed in Exhibit G were not identified on the revised Exhibit G-1. Please address comments
17b and 17c:
Response: The comment requested additional information on item 17c, but we assume this meant 17e.
Pikeview Quarry Amendment 4, Response to Adequacy
January 7, 2020