PERMFILE53622

• Permit No: M2004078
• IBM Index Class Name: Permit File
• Doc Date: 4/8/2005
• Doc Name: 2nd Hydrology Review
• From: DMG
• To: DMG
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
7313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
DATE: Apri18, 2005
TO: Erica Crosby, Carl M/~o~t
FROM: Tom Schreiner ~~~~j
COLORADO
DIVISION O F
MINESRALS
GEOLOGY
0.ECLAMATION•MINING
SAf ETY•SCIENCE
Bill Owens
Governor
Russell George
Executive Director
Ronald W. Catlany
Division DlreC[Or
Natural Resource Trustee
RE: 2nd 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 March 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 I" = 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 compazable to the other mining plan maps provided, ie: I" = 300
feet. Asper Rule 6.2.1(2)(e), maps need to be clearly readable and prepazed at a scale not larger
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 discharged 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: Discharge
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 headcut[ing. Discharge 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" prepared in
Febmary, 2005 specified six (6) distinct phases of mining, M1 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, MI through M6, as
Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey