2022-11-07_PERMIT FILE - M2022001

• Permit No: M2022001
• IBM Index Class Name: Permit File
• Doc Date: 11/7/2022
• Doc Name Note: Cover Letter
• Doc Name: Adequacy Review Response
• From: Red Tierra Equities, LLC
• To: DRMS
• Email Name: PSH
• Email Name: JLE
• Media Type: D
• Archive: No

CIVIL RES-!DURCES, LLI
ENGINEERS 6 PLANNERS
November4th,2022 RECF11111=in
Mr. Peter Hays NOV 0 7 2022
Division of Reclamation,Mining, and Safety
1313 Sherman Street,Room 215 Colorado Division of Reclamation,
Denver,Colorado 80203 Mining and Safety
RE: Red Tierra Equities,L.L.C.,Section 20 Mine,File No.M-2022-001,112c Permit Application
Adequacy Review 5 Response
Dear Mr. Hays:
This letter addresses the Adequacy Review letter dated November 3rd,2022 regarding the Section 20
Gravel Mine 112 Construction Materials Reclamation Permit Application Package. Responses to your
comments follow:
The following items will need to be addressed to the Division's satisfaction prior to the decision date. If
you are unable to satisfactorily address any concerns identified in this review before the decision date,it
will be your responsibility to request an extension of the review period. if there are outstanding issues
that have not been adequately addressed prior to the end of the review period, and no extension has
been requested, the Division may deny this application. Exhibit C-Pre-Mining and Mining Plan Maps(Rule
6.4.3):
1. Please update the Exhibit C maps to show the underdrains and other potential groundwater
mounding/shadow mitigation structures discussed in the Groundwater Model.The Exhibit C maps have
been updated to show the underdrainsldewatering wells,manhole and infiltration pond discussed in
the full mitigation scenario with recharge. A recharge pond will be utilized to mitigate the
groundwater shadow effect and to receive water from the underdrains and or dewatering wells. The
infiltration pond will be constructed prior to the Cell 4 slurry wall.
Exhibit D-Mining Plan(Rule 6.4.4):
2. Please update the Mining Plan according to item 8 below. Included,see response to item 8.
6.4.18 Exhibit R-Proof of Filing with County Clerk and Recorder
3. Please provide an affidavit or receipt indicating the date on which the revised application
information required to address this adequacy letter was placed with the Weld County Clerk and
Recorder forpublic review, pursuant to Subparagraph 1.6.2(1)(c).
Exhibit N-Source of Legal Right to Enter(Rule 6.4.14)Attached.
4. The Applicant is proposing to install a solid discharge pipe through the Monarch DENM site during
Phase 2 of the proposed groundwater mitigation plan. Please provide documentation of the legal
right to enter to conduct mining and reclamation, for Owners of Record described in Rule
1.6.2(1)(e)(i). This may include a copy of a lease, deed, abstract of title, a current tax receipt, or a
signed statement by the Landowner and acknowledged by a Notary Public stating that the
Operator/Applicant has legal right to enter to conduct mining and reclamation.
Please note the inclusion of addition affected lands as defined by Rule 1.1(3)would require the
Applicant to submit an amendment to the application pursuant to Rule 1.8.1. In order to keep all
infrastructure inside the affected area the applicant proposes that water from the eastern underdrain
1 dewatering wells and the western underdrain will flow to a 5'manhole between Cell 5S and Celt 6.
The water collected in this manhole will flow into a 24"solid pipe to the Infiltration Pond north Cell 7.
8308 COLORADO BLVD • SUITE: 200 • FIRESTONE, COLORAD0 80504 • PHONE: [phone] • FAX:
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