2022-08-08_REVISION - M1977151

• Permit No: M1977151
• IBM Index Class Name: Revision
• Doc Date: 8/8/2022
• Doc Name: Request for Technical Revision
• From: Applegate Group, Inc.
• To: DRMS
• Type & Sequence: TR3
• Email Name: ECS
• Email Name: MAC
• Email Name: AWA
• Media Type: D
• Archive: No

Applegate
Group, inc.
Water Resource Advisors for the West
July 31, 2022
Mr. Eric Scott
Colorado Division of Reclamation, Mining, and Safety 1313 Sherman Street, Room 215 RECEIVED
Denver, CO 80203
AUG 08 2022
RE: Technical Revision No. 3 for Greeley Pit (M-1977-151) DIVISION OF RECLAMATION,
MINING &SAFETY-MINERALS
Dear Mr. Scott:
On behalf of the R.M. Hiner Construction Co. (Hiner), please accept the following technical
revision request for the Greeley Pit, Permit No. M-1977-151. This will be the third technical
revision of the permit and is intended to address the issues identified in your March 25, 2022,
inspection report for the pit and reiterated in your July 7, 2022, extension request approval.
The Greeley Pit is a permitted sand and gravel pit located in the NE '/4 of Section 36, Township 6
North, Range 66 West and the NW '/4 of Section 31, Township 6 North, Range 65 West of the 6th
P.M. as shown in Figure 1, attached. Past mining at the site has resulted in approximately 71.8
acres of exposed groundwater in three distinct water bodies. Of this amount, approximately 40.2
acres were exposed prior to 1981 and therefore do not require augmentation. The net exposed area
remaining not considered pre-1981 is therefore 31.6 acres. Pursuant to the current Substitute
Water Supply Plan (SWSP) for this site approved by the Colorado Division of Water Resources
(DWR) on May 13, 2022, the net evaporation rate is this area is 33.11 inches per year, totaling
87.19 acre-feet of evaporative loss per year from the net exposed groundwater area.
In order to comply with Colorado Division of Reclamation, Mining, and Safety (DRMS)
requirements for the protection of water resources, Hiner has adopted Approach No. 4 outlined in
the DRMS letter dated April 30, 2010. Hiner currently own 6.25 Greeley Irrigation Company
(GIC) shares, and a notarized affidavit dedicating these water rights to the Greeley Pit SWSP was
executed on April 1, 2020. Each share of GIC provides approximately 10.31 acre-feet of
consumptive use credit per year; therefore these 6.25 GIC shares provide approximately 64.44
acre-feet per year of consumptive use credit on average. The long-term net evaporative loss from
the current exposed area is 87.19 acre-feet per year as established in the current SWSP. Because
the 6.25 GIC shares are insufficient on their own to cover all long-term evaporative depletions,
Hiner intends to cover the difference (22.75 acre-feet per year) by backfilling portions of the
exposed area and acquiring additional GIC shares for dedication to the site(as such shares become
available).
www.applegategroup.com Denver • Glenwood Springs • Hotchkiss [phone]