REV15871

• Permit No: C1981035
• IBM Index Class Name: Revision
• Doc Date: 12/14/1993
• Doc Name: PR REVIEW OF GEOLOGY AND HYDROLOGY ISSUES NATIONAL KING COAL C-81-035
• From: DMG
• To: HARRY RANNEY
• Type & Sequence: PR4
• Media Type: D
• Archive: No

• • III IIIIIIIIIIIII III
999
STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman SI., Room 215
Denver, CO BO?03
Phone: [phone]
FAX:[phone]
December 14, 1993
To: Harry Ranney /lj~ /)
FM: Bhaxn smith '` ~/
Re: PR Review oY Geology and Hydrology Issues
National Riag Coal (C-81-035)
Dear Harry:
pF' COQ
•T.
• • X8'!6
Roy Romer
Governor
Michael B. Long
Division Drteaor
I have finished reviewing the Permit Revision materials for the
National King Coal Mine. Below are my comments.
The following resources were used in the review:
Findings Document 1989 and 1992
NOV History
Permit volumes I-III (current)
8ectioa 2.04.6: Geology
To National King Coal's credit, the Geology section has greatly
been improved with the revised pages of Section 2.04.6 submitted
for review. The stratigraphic and structural information clearly
and thoroughly explains the relationship between the formations,
the water table and mining operations. One editing comment: on
page 4, under Coal ouality, the second sentence, "Coal analysis as
well as..." should be deleted since it is repeated in the next
paragraph.
No additional comments on this section.
8ectioa 2.04.7: Hydrology
Issues•
1. The permit does not have a Probable Hydrologic Consequence
section. With the revision, Appendix 4(6), "Effects of Mining
on Ground Water" was submitted and may be edited for this
purpose. Additionally, Section 2.04.7, page 6, first
paragraph ("As all mine workings..") could also be prefaced
with "PHC". However, alone these two edits are not enough to
comprise a sufficient PHC.
What is needed in the permit is documentation utilizing
baseline (if possible) and present monitoring results to both