REV92109

• Permit No: C1980007
• IBM Index Class Name: Revision
• Doc Date: 5/10/2006
• Doc Name: Request for Support and Responses Memo
• From: Byron Walker
• To: Tom Kaldenbach
• Type & Sequence: PR10
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Departmepr~(Jalurotjr~ps 2006
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
Interoffice MEMORANDUM
to: Tom Kaldenbach
from: Byron G. Walker 'W
cc: Kent Gorham, Dan Hernandez, Sandy Brown (all a-mail)
subject: Request for Support, West Elk (C-80-007) PR 10 Responses
date: May 10, 2006
COLORADO
DIVISION O F
MIN SRALS
GEOLOGY
RECLAMATION•MINING
SAf ETT•SCIENCE
Bill Owens
Governor
Russell George
Executive Director
Ronald W. Cattany
Division Director
Natural Rewurce Trustee
Tom, this memorandum is a review of Kent's comments as to how well the questions proposed
convey my concerns as expressed in my memorandum of April 25, 2006.. I recommend
rewording and additional wording as follows in bold. These comments were discussed with Kent
on May 9, and with Henry Barbe on May 10, 2006. Henry and I agree that all these issues were
discussed and courses of action agreed curing the telephone conference call held on May 9.
Therefore, no additional written correspondence is necessary with regard to this memorandum.
To item 86a, change the first sentence to read: A map showing the proposed workings,
location and configuration of structures and renewable resource lands, and each survey
monument is required. Rule 2.05.6(6)(c)(ii). This map is a good place to show the areal
extent of predicted subsidence related phenomena within the permit and adjacent area as
well [Rule 2.05.6(6)(e)(i)(F)(IV)].
To item 86b, add: The lists of structures and renewable resources that exist within the
proposed permit and adjacent areas are not consistent. Lists or items are presented on
pages 2.05-109, 2.05-143, 2.05-146, 2.05-148, and pages 19, 21, and 23 of Exhibit 60B. Please
reconcile the lists, or make one list with references to the single list at other times. Please
consider removing landslides and rockfalls from the lists of structures and renewable
resources, and treat them as areas of special interest for monitoring. Rule 2.05.6(6)(a)
West Elk is going to monument and monitor landslides and rockfalls.
Item 18. I disagree with Kent to some extent. The Monument Dam is a structure in an adjacent
area of the permit. As it is on the list of structures, Rule 2.05.6(6)(b) requires a description of the
worst possible consequences which subsidence, if it occurred, could have on the structure. The
statement that mining will not affect the Minn Res. is part of the subsidence control plan. [Rule
2.05.6(6)(f)(iii)(B)(III)] Iwould omit this comment.
Office of Office of Colorado
Mined Land RExlama[ion Active and Inactive Mines Geological Survey