GENERAL40636

• Permit No: C1982057
• IBM Index Class Name: General Documents
• Doc Date: 8/8/1985
• Doc Name: PROPOSED DECISION AND FINDINGS OF COMPLIANCE
• Permit Index Doc Type: FINDINGS
• Media Type: D
• Archive: No

IX. Assessment of Probable
umu attve y ro ogtc
•
logic Consequences of Minino and
(c)
This Cumulative Hydrologic Impact Study (CH IS) fora portion of the Yampa
River basin has been prepared by the Colorado Mined Land Reclamation Division
(CMLRD) pursuant to Rule 2.07.6(2)(c). This CH IS assesses the projected
cumulative hydrologic impacts of all anticipated mining operations in the
general area of the proposed Seneca II-W surface mine. The cumulative impacts
include both surface and ground water impacts, however, the general area as
defined for surface and ground water basins do not coincide. The surface
water general area includes the cumulative effects of anticipated mining in
the upper Yampa River Basin to Hayden, Colorado (see Figure No. 2).
1) Sunland Mining Corporation -Apex No. 2 Mine, CMLRD Permit No.
C-011-81
2) Pittsburg and Midway Coal Company -Edna Mine, CMLRD Permit No.
C-001-80
3) Colorado Yampa Coal Company -Energy Mine No. 1 and No. 2, and the
Eckman Park Mine „ CMLRD Permit No. C-79-177
4) Colorado Yampa Coal Company -Energy Mine No. 3, CMLRD File No.
C-84-062
5) Twentymile Coal Company - Foidel Creek Mine, CMLRD Permit No. C-056-82
6) Peabody Coal Company - Seneca II Mine, CMLRD Permit No. C-005-80
7) Peabody Coal Company - Seneca II-W Mine, CMLRD Permit No. C-057-82
8) Sun Coal Company - Meadows No. 1 Mine, CMLRD File No. C-029-81
9) Rock castle Company - Grassy Gap Coal Mine No. 1, CMLRD Permit No.
C-039-81
Structural basins strongly influence the direction of ground water flow in
contiguous regional aquifers and thus, these basins define the limits of the
area considered hydrogeologically adjacent. The Seneca II-W Mine lies on the
western flank of the Sage Creek Anticline, a minor component of the regional
Sand Wash Ground Water Basin. Due to structural limitations and the size of
the Sand Wash Basin cumulative impacts with adjacent mines will not occur.
Further discussions of this is included in later portions of this section.
Mining operations include both surface and underground mining operation. All
mines listed are currently permitted operations except the Seneca II-W Mine.
The Meadows No. 1 Mine is currently in a phase of reclamation only. Foidel
Creek and Apex No. 2 are underground mines.
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