GENERAL35604

• Permit No: C1981038
• IBM Index Class Name: General Documents
• Doc Date: 7/21/1988
• Doc Name: PROPOSED DECISION & FINDINGS OF COMPLIANCE FOR RN1
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

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undermined or otherwise affected by CWI during this five-year (5) year permit
terns until the 1990's. Although CWI feels the existing studies including
aerial photographs are adequate to characterize these lands. the Division
disagrees and feels field verifications are needed. Therefore. the following
stipulation is imposed.
Stipulation No. 28
CWI SHALL COMPLETE THE ON-THE-GROUND FIELD VERIFICATIONS OF SURFACE
WATER RESOURCES ON THOSE LANDS FOR WHICH RIGHT OF ENTRY HAS NOT BEEN
OBTAINED. THE RESULTS OF THE SURVEY SHALL BE APPROVED BY THE DIVISION
PRIOR TO CWI UNDERMINING OR OTHERWISE AFFECTING THESE LANDS.
On-going monitoring consists of eleven surface water monitoring sites which
are monitored monthly for field parameters, as weather permits, and quarterly
for ma,)or cations and anions, In addition, twenty-five ponds are evaluated
monthly for field parameters and quarterly for mafor cations and anions to
document baseline conditions should there be any subsidence-related impacts.
In order to distinguish between natural and mine-related water loss, accurate
rainfall data evaporation rates are needed. The following stipulation is
imposed:
Stipulation No, 30
• CWI SHALL CONTINUE 70 MAINTAIN RAINGAGE AND EVAPORATION PAN MONITORING
AT OR NEAR THE CWI WELL FIELD. THE RAINGAGE SHALL RECORD DAILY AND THE
EVAPORATION MONITOR SHALL RECORD EVAPORATION MONTHLY WHEN NOT FROZEN.
In order to minimize water quality impact to water flowing through the Orchard
Valley Nest Mine area, water from East Roatcap Creek is diverted to Nest
Roatcap Creek. To verify that no water will be lost when the Overland Ditch
diversion is used. the Division requests the following stipulation.
Stipulation No. 31
CWI SHALL SUBMIT A PLAN TO MONITOR WATER QUANTITY CHANGES AS A RESULT OF
CHANGING THE OVERLAND DITCN POINT OF DIVERSION TO WEST ROATCAP CREEK
WITHIN THIRTY DAYS OF PERMIT ISSUANCE.
With acceptance of the above stipulations the information has been reviewed
and found to be 1n compliance with the requirements of this section.
VI. ALLUVIAL VALLEY FLOORS (2.06.8, 4.24)
The discussion of alluvial valley floors can be found on pages 5-6, Section
2.06 of Volume 1 and in the AYF Appendix, Volume 4.
Identification of Alluvial Valley Floors
. The general area in which the Orchard Valley Mine is situated contains several
deposits of alluvium. These alluvial deposits are derived from three
sources: 1) Flood-plain alluvium (Qal) along the North Fork of the Gunnison
River; 2) Valley-fill deposits (Qvf) along a portion of Steven's Gulch; and