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REP07464
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REP07464
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Last modified
8/24/2016 11:37:39 PM
Creation date
11/26/2007 11:37:15 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981044
IBM Index Class Name
Report
Doc Date
6/24/1994
Doc Name
1993 AHR Text & Appendices
From
CYPRUS EMPIRE CORP
To
DMG
Permit Index Doc Type
Hydrology Report 1993
Media Type
D
Archive
No
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Wyoming. The second river is the Williams Fork, which is a <br />• major tributary of the Yampa River. The Williams Fork River <br />joins the Yampa River on the mine property. Monitoring data is <br />collected for the Williams Fork River. Monitoring data is also <br />collected from one spring, the fl Strip Pit (NPDES site 022). <br />In 1993 there was no discharge from the sediment ponds. RIVERS <br />FIAWS The Williams Fork River flow data is collected by the <br />U.S. Geologic Survey at one continuous gaging station and one <br />staff gage. The Williams Fork River continuous gaging station <br />(WF-2) is near the confluence with the Yampa River, downstream <br />of the f5 Mine discharge. The staff gage (WF-1) is located <br />upstream of the mine discharge points. The flow data for <br />Station WF-2 for 1993 was taken from magnetic format data <br />provided by the USGS. A plot of daily mean flow versus time <br />• for the Williams Fork River for 1993 is presented in Figure <br />25. For the Williams Fork River at Cyprus Empire Corporation, <br />flows measured by the USGS during calendar year 1993 showed a <br />maximum daily flow of 2490 cfs and a minimum daily flow of 28 <br />cfs. Monthly minimum, maximum and mean flows are plotted for <br />each month of record in Figure 26. The flows in the Williams <br />Fork River during 1993 appear above normal for the period of <br />record. These flows including comparison between upgradient, <br />WF-1, and downgradient, WF-2, measured to date, do not show <br />any stream depletion impacts from mine dewatering. <br />u <br />~, <br />
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