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REP20166
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Last modified
8/24/2016 11:48:46 PM
Creation date
11/27/2007 2:49:16 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Date
12/11/2001
Doc Name
1994 Annual Hydrology Report
Annual Report Year
1994
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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• <br />• <br /> <br />Fh~drologic Monitanng Arnvirics <br />Average daily flow measurements (including <br />mean, maximum, and minimum flows) for <br />the five MCC gauges are summarized in <br />Appendix A. One of the stilling wells froze <br />in October, three in November, and one in <br />December. Thawing began in February, but <br />it was mid-March before all stilling wells <br />had thawed. Nearly three months of flow <br />information was not acquired due to sedi- <br />ment below the flume in Sylvester Gulch. <br />Flow data are available from the two USGS <br />monitoring stations (these stations are on <br />Minnesota Creek downstream of the Dry <br />Fork, and on the Noah Fork of the Gun- <br />ttison River near Somerset, Colorado. The <br />North Fork station is located approximately <br />~/<-mile upstream of the mine site). Because <br />the USGS eauging stations are heated, they <br />were unaffected by freezing temperatures. <br />WY 1993 data for these sites are presented <br />in Appendix B and Appendix C, respec- <br />tively. <br />Seasonal (three times per year, scheduled <br />for start and peak spring runoff, and fall low <br />flow) water samples were planned to be <br />taken and analyzed for water quality at the <br />eight surface water monitoring stations. <br />Measured field parameters included pH, <br />conductivity, temperature, dissolved oxygen, <br />and turbidity. Samples were sent to a labo- <br />ratory and analyzed for pH, conductivity, <br />total dissolved solids, total suspended solids, <br />total iron, and total manganese. In addition <br />to these parameters from samples obtained <br />three times each year, field water quality <br />measurements of pH, conductivity, tempera- <br />ture, dissolved oxygen and turbidity were <br />taken during monthly flow measurements of <br />the MCC stations. Testing was accom- <br />plished by ACZ Laboratories, Inc. (Steam- <br />boa[ Springs). Water analyses report are on <br />file at the West Elk Mine. Sampling results <br />are summarized in Appendix D. Monthly <br />average minimum and maximum values for <br />the baseline monitoring period are compared <br />with WY 1993 data for the Sylvester Gulch <br />and North Fork Gunnison stations in Ap- <br />pendix E. <br />Spring Water Monitoring <br />Seven established spring stations were <br />monitored throughout WY 1993, and <br />baseline monitoring was initiated in the third <br />quarter of 1993 at 19 additional stations for <br />the collection of baseline data for the Jumbo <br />Mountain expansion. Monitoring of three <br />springs was renewed in Lone Pine Gulch at <br />the same time. The monitoring program for <br />these 26 spring monitoring stations is <br />summarized in Table 2. Their locations are <br />shown on Exhibits 1 and 4. All known <br />springs in the permit area are shown on <br />Map 34 in Volume 5 of the M and R Plan. <br />Seasonal (three times per year) samples <br />were scheduled at the seven springs. Field <br />measurements of flow, pH, conductivity, <br />temperature, dissolved oxygen, and <br />turbidity, and the results of laboratory <br />analyses for pH, conductivity, total <br />dissolved solids, total suspended solids, <br />iron, and manganese are presented in <br />AppendL~c F. Maximum and minimum <br />values for the baseline monitoring period are <br />compared with WY 1993 data in Appendix <br />E for the seven established springs. Bar <br />graphs depicting the seven spring flows from <br />1979 to the present are at Appendix G. <br />Baseline data for the nineteen new springs <br />will be established during the monitoring <br />period September 1993 through August <br />1994. <br />MCC informally monitors USFS water <br />resources shown in Exhibit 2. Table 3 <br />3 Revised October 9, 1996 <br />
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