PERMFILE63882

• Permit No: M2004078
• IBM Index Class Name: Permit File
• Doc Date: 4/8/2005
• Doc Name: Adequacy Review #2
• From: DMG
• To: SW TKO Joint Venture LLC
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: (303) 832$106
DATE: Apri18, 2005
COLORADO
D I V I S 1 0 N O F
MIN SRALS
GEOLOGY
0.ECLANATION•NI NINO
EAFETY•ECIENCE
- Bill Owens
Governor
TO: Erica Crosby, Carl Mount Russell George
Executive Director
FROM: Tom Schreiner ~ Ronald W. CaBany
'ITT~~~/ Division Director
Natuml Resource Trustee
RE: Znd Hydrology Review, Lupton Lakes Resource, SE TKO Joint Venture, File M-2004-078
Class: Permit
This memo contains 2nd adequacy review comments from the Division's Hydrology Review of
the Lupton Lakes Resource Regular 112 Application and Mazch 30, 2005 adequacy response,
File No. M-2004-078.
1. The "Well Location & Hydrologic Features Map" contains a variety of important
hydrologic information; however, the map was provided at a scale of 1" = 1,000 feet and some of
the detail such as well location and ownership is difficult to read. The Division would appreciate
a copy of such map at a scale comparable to the other mining plan maps provided, ie: 1" = 300
feet. Asper Rule 6.2.1(2)(e), maps need to be cleazly readable and prepared at a scale not lazger
than 1" = 50 feet nor smaller than 1" + 660 feet. Please respond.
Mining
2. The applicant has clarified that water from pit de-watering operations will be dischazged at a
rate of 45 cfs into two (2) concrete box culverts located in the northwestern comer of the permit
area. However, the revised "Mining Plan Map" shows a third point of discharge, ie: Dischazge
to Exist ROW. Also, based on the Division's pre-operation inspection on March 4, 2005 it
appears that the southern most point of discharge via historic drainage easement consists of a
badly eroded channel with potential for headcutting. Dischazge of pit waters at this location will
require stabilization of the eroded embankment prior to discharge. Please respond.
3. The revised "Mining Plan Map, 3 of 7"depicts 19 distinct units, each less than 25 acres in
size while the original "Mining Plan Map, 3 of 7" specified 17 distinct units, each less than 25
acres in size. Conversely, the "Groundwater Model -Lupton Lakes Project"prepazed in
Febmary, 2005 specified six (6) distinct phases of mining, Ml through M6, that were used in the
assessment of hydrologic impacts to groundwater during mining; and the assessment of impacts
to groundwater for these 6 phases was done incrementally rather than cumulatively. Further, the
applicant has not provided a map showing the boundaries of the 6 Phases, Ml through M6, as
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey