2022-03-25_PERMIT FILE - M2022001

• Permit No: M2022001
• IBM Index Class Name: Permit File
• Doc Date: 3/25/2022
• Doc Name: Adequacy Review Response
• From: Civil Resources, LLC
• To: DRMS
• Email Name: PSH
• Email Name: JLE
• Media Type: D
• Archive: No

CIVIL RES'�URCES,LL�
ElVGINEERS & PLANNERS
�� ��L?��,���
r....�.��.
�t+°. r �� � �, ,
March 24�h,2022 �6t�� `' " ���
Mr. Peter Ha s DIVISIUN �� RE�CLAP�IATI�N,'
Y IVIINING ���FETY-MINERALS
Division of Reclamation, Mining, and Safety
1313 Sherman Street, Room 215
Denver, Colorado 80203
RE: Red Tierra Equities, L.L.C., Section 20 Mine, File No. M-2022-001, Requested Documents
From Site Visit
Dear Mr. Hays:
On March 3�d,2022, I met with you for a site visit of the proposed Section 20 Gravel Mine site.At the site
visit we discussed application deficiencies you had found in the adequacy review process up to that point.
This letter addresses those deficiencies and provides the documentation requested.
The following describes the deficiencies discussed and the action taken to address them:
• Weed Control Plan addition to Reclamation Plan—A weed control plan has been added to the
Exhibit E-1 Reclamation Plan.
• Groundwater mounding and shadow model—I am currently working on a groundwater model to
forecast the groundwater conditions after slurry wall construction.The results will be included in a
future letter.
• Send geostability exhibit—The slope stability analysis for the site has been attached to this letter.
• Update exhibit c-3(structures within 200')to include CWCWD water lines, Century Link Fiber
Optic,the SunShare Community Solar Solar Farm, and call out the DCP line in the southwestern
section of the property—Exhibit C-3 has been updated to include these structures.
• Add acreage for northern parcels in Exhibit A—The acreage for the northern parcels has been
included in Exhibit A.
• Commit to sending water data with annual report—The following language has been added to
Exhibit G (Water Information)Groundwater Level Monitoring and Mitigation Plan: "The monthly
measurements will be fabulafed and included with the DRMS annual report for the site."
• Update Exhibit M(Permits)to include SEO's SWSP—Exhibit M (Permits)has been updated to
include the Substitute Water Supply Plan.
• Update Exhibit D(Mine Plan)to commit to providing slurry wall design—The following language
has been incorporated into the attached Exhibit D (Mine Plan): "Prior to starting consfruction of any
slurry wall, a Technical Revision to update the sife bonding will be applied for and will include the
slurry wall design report."
In addition to the items discussed, I have also attached proof of mailing to the property owners and
structure owners within 200 feet of the affected land.
323 Fi�rH STREET• P.�. Bax 680 • FREDERICK, COLORADO 8053❑ • PHONE: [phone] • Fax: [phone]