REP48116

• Permit No: C1981020
• IBM Index Class Name: Report
• Doc Date: 8/14/1987
• Doc Name: MUNGER AND MCCLANE CANYON MINES ANNUAL HYDROLOGIC REPORT
• From: MLRD
• To: TOM GILLIS
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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STATE OF COLORADO
Roy Romer, Governor
DEPARTMENT OF NATURAL RESOURCES
MINED LAND RECLAMATION DIVISION
DAVID C. SHELTON, Director
DATE: August 14, 1987
T0: Tom Gillis
FROM: Steve Renner
RE: Munger and McClane Canyon Mines Annual F(ydrologic Report
(Files C-80-004, C-81-021)
Per your request, I have reviewed the Salt Creek Mining Company Annual
Hydrologic Report (AHR) for the Munger and McClane Canyon Mines. This annual
report was submitted to satisfy conditions of the approved permit.
The McClane and Munger Mines remained essentially inactive during the
reporting period. Therefore, little change to previously reported conditions
has occurred. While the Munger Canyon Mine remains dry, the McClane Canyon
Mine realizes inflows of approximately 1.2 gallons per minute. Although there
is some question as to the inflow mechanics, the consequences of dewatering
into the mine remain negligible. The statement of probable hydrologic
consequences regarding ground water impacts remains valid for both operations.
Due to site inactivity, the surface water monitoring program is restricted to
quarterly monitoring of McClane Creek and Munger Creek. Water quality
analysis results demonstrate that each creek exhibits variable concentrations
of each sampled parameter as flow conditions change. No clearly discernable
pattern of parameter concentration is evident. Based upon the McClane Creek
water quality sample of January, 1987, it does not appear that the McClane
Canyon Mine discharge is significantly impacting McClane Creek. It appears,
therefore, that the statement of probable hydrologic consequences regarding
impacts to Salt Creek remains valid for both operations.
Although the report is very well done, it is suggested that future annual
hydrologic reports be structured around a water year (October 1 through
September 30) reporting period. Changing the actual period of time in which
data is examined will not impact the frequency or timing of data collection,
nor will it affect the submittal date for the report. Changing to the water
year format will allow both the Division and the operator to analyze data
within a logical period of time:base flow to baseflow. If the operator wishes
to discuss the mechanics of changing to this reporting period, please have
them contact me.
cc: Mike Savage
/bdc
1777E
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. [phone]