PERMFILE124030

• Permit No: C1981034
• IBM Index Class Name: Permit File
• Doc Date: 9/9/1982
• Section_Exhibit Name: APPENDIX I Hydrology & Alluvial Valley Floor Report, Kaman Tempo 9/82
• Media Type: D
• Archive: No

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H a••~s D Sn e•~+an E.ecW i.e D~~ee~n~
~i l~ Ell L:1\ U (t F,c;1.:111.a'1'I(.-~
)23 Centennial Building, 131?.Sherman Street
Denver, Colorado 80203 Tel. [phone]~3GG7
Hamlet J. Garry, II I,
Director
January 18, 1987

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TO: Dan N.athews ~ ~/~{'
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FROM: Rou L. Cox (,'"
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SUBJECT: Technical Adequacy Review of the Grand Flesa Coal Company,
Red Canuon No. 1 and No. 2 Mines Perini[ Application and
Responses, File No. C-034-61
I have completed the technical adequacu review you requested on the ground-
water, water quality, monitoring and geoIocy sections of the Red Canyon No. 1
and No.•7 mines.• Permit Application and Responses to preliminary adequacy
questions. During this reviee.•, several serious concerns were identified.
Among the identified concerns are: 1) The on and off-site impacts of mining(Se(' $2CC10f1
activities on surface and groundwater rights; 7) The impacts of mining on IV dnd V)
surface and groundwater supplies to an alluvial valley floor (AVF); and 3)
The impacts of mining on renewable resource Iands (e.g., aquifers, areas for I
recharge to aquifers, areas for agricultural production of food, and pasture
lands). These concerns arise frc:~ the sensitivity of the lands to be under-
mined to changes in the quality and quantitu of ground and surface waters.
These concerns are no[ adequately dealt with within the hydrology sections of the
permit application, since they are not supported by enough site-specific data.
Also maps contained within the geologp and hydrology sections lack. legible contour I
lines, stream channels, and lack critical information such as springs, irrigation
systems, some monitoring well locations and drainage system boundaries. Written
findings have to be made by the Division before issuing a permit. These findings
can not be made aL this time Given the information presented in the permit
application and the information available to the Division. The following findings ~,
can not be made:
1) The applicant has provided to the Division adequate hydrologic information to
make an environmental assessment (Rule 1.07.6(2)(a));
1) The applicant's proposed mining operation is designed to prevent damage to
the hydrologic balance outside the proposed permit area (Rule ?.07.6(1)(c));
3) The applicant's proposed operation will not interrupt, discontinue or preclude
farming upon alluvial valley floors (Rule 1.07.6(7)(k)); and
4) The applicant has identified the extent to which the proposed mining activities
may proximately result in contamination, diminution or interruption of an under-
ground or surface source of water within the proposed permit and adjacent areas
for all legitimate beneficial use. If water rights will be impacted, the appli-
cant will provide an alternative water supply.
The Red Canyon No. 1 mine in the E-Seam and the proposed No. 7 mine in the D-Seam,
will undermine a major aquifer in the area, the "Glacial-Alluvial Aquifer". This
aquifer is composed of over ?50' of coarse grained unconsolidated deposits, and
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