2010-02-19_PERMIT FILE - M2009018

• Permit No: M2009018
• IBM Index Class Name: PERMIT FILE
• Doc Date: 2/19/2010
• Doc Name: Reply to Adequacy Review-06
• From: Varra Companies, Inc.
• To: DRMS
• Email Name: MAC
• Media Type: D
• Archive: No

Varra Companies, Inc.
Office of Special Projects
8120 Gaize Street Frederick Colorado 80516 Telephone [phone] Fax[phone]
Wednesday 18 February 2010
Michael A. Cunningham, EPS RF-CM
Colorado Office of Mined Land Reclamation (the Office)
19 2010
Division of Reclamation Mining and Safety FEB
1313 Sherman Street, #215 Division 01 'Je0at ,
Denver, Colorado 80203 Mining art's sd*
Subject: M-2009-018 - Heintzelman Project: Reply to Adequacy Review -06.
Dear Michael:
We trust you will find the following comments consistent with our conference of Tuesday 17
February 2010 with respect to your Adequacy Review -06:
1. The operator concurs with the options detailed by the Office in part 1 of its Adequacy
comments.
2. The operator prefers to perform all required groundwater monitoring on-site. To that
end, existing on-site wells and additional groundwater monitoring wells shown in the
attached maps - referencing the Northern and Southern portions of the Heintzelman
Project - will be utilized. The new groundwater monitoring well locations were
determined by CGRS. Their rationale is as follows:
a. The groundwater monitoring wells referenced in the included maps will be
permanent and not removed by the extraction operations (for clarity - the
established groundwater monitoring well [41200MH] in the Northern portion of
the project area will at some point be excavated - but may be utilized while in
service).
b. The groundwater monitoring wells designated in the included maps are located so
that as mining progresses, data can be utilized to compare predicted draw-downs
to measured draw-downs at both close and distal proximity.
c. The variations in draw-down as excavation approaches the various well locations
in time and space will be invaluable data for future draw-down predictions.
d. The groundwater monitoring wells are located in a manner to assure the necessary
access for the duration necessary.
3. The operator concurs with the options detailed by the Office in part 3 of its Adequacy
comments. Consistent with our conversation of 17 February 2010, the Office is open
to any other solution as may reasonably present itself as a remedy to the concerns
attendant to this item, were it evidenced it meets the standards of the Office, or the
Office of the State Engineer - Division of Water Resources, or both.
4. Proof of placement with the Clerk to the Board of Weld County for this
correspondents and related documents detailed under attachments, is included with
this submittal.