REV00292

• Permit No: C1982056
• IBM Index Class Name: Revision
• Doc Date: 2/1/2000
• Doc Name: FOIDEL CREEK MINE C-82-056 PERMIT RENEWAL NO 3 ADEQUACY RESPONSE REVIEW
• From: DMG
• To: TWENTYMILE COAL CO
• Type & Sequence: RN3
• Media Type: D
• Archive: No

provide an explanation or injo~ma[ion suj~cient to verify compliance with the right to enter
requirements.
Twentymile Coal Company provided no response to Item 67(h) of DMG's 1/14/00 adequacy
letter. Please address this item, or discuss why a response is not necessary.
73 a) Item 73.a) has been resolved to the extent necessary for the approval of RN-03. Issues
previously raised pertaining to the direction of dip of the regional geologic faults, and the amount
of that dip, will be addressed in the Division's review of PR-O5. It should be noted that the
symbols for strike and dip shown on Map 5 (TCC response of 1/15/00) appear to be associated
more with a certain lithologic unit than with the faults discussed on existing permit page 2.04-14
(second pazagraph).
73.b) With regard to item 73.6), DMG, in its adequacy letter of Mazch 2, 1998, indicated at that time
that Maps 6, 6A, 10, and l0A may have needed updating, to reflect actual geologic conditions
encountered while mining in the Eastern Mining District. TCC's 11/12/99 response indicated
that these four maps were in the process of being updated, and that Maps 6 and 6A would be
consolidated into one new Map 6.
The copy of Map 6 that we have on file was certified 3/31/97. The copy of Map 6A we have on
file was certified 4/3/93. According to TCC's 1/15/00 response, Map 6 was updated on
11/18/99. We are unable to locate this 11/18/99 Map 6 in our set of materials. We would
appreciate receiving a copy of this map. Please also indicate whether this new Map 6 is a
consolidation of the old Maps 6 and 6A. If it is not, please provide us with an updated Map 6A
as well.
Please understand that once we receive the most recently-revised versions of Maps 6 and 6A, we
may have additional questions with regazd to the adequacy of the map(s), and with regard to the
relationship of the structural geology to the regional hydrologic regime of the area within and
adjacent to the Foidel Creek Mine permit boundary [Rules 2.04.6(1)(a), (c), and (d)].
Maps 10 and l0A were consolidated into a new Map ] 0, certified 1 /30/98. This new Map 10
was approved in conjunction with PR-04, and as such, is adequate.
With regazd to Figure 1 B, we apologize for not having seen the comment in TCC's 12/15/99
adequacy response letter that Figure IB will be replaced by Map 8. As we indicated in our
RN-03 adequacy letter, dated January 14, 2000, Map 8 has been adequately updated, and Figure
1 B is no longer an adequacy item.
With regard to Exhibits 10 and 11, DMG indicated in our 3/2/98 RN-03 adequacy letter that
these exhibits may have needed revising with regard to the Northern Mining District. Now that
we are reviewing an application (PR-OS) for TCC to expand into the Northern Mining District,
we will address the adequacy of Exhibits 10 and 11 in conjunction of our review of PR-O5. We
consider the matter pertaining to Exhibits 10 and 11 resolved with regard to the application for
RN-03.
Additional items that were identified in the Division's January 14, 2000 letter as needing correction:
C:\J H B\C82056\RN03\020100resp. doc