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GENERAL44650
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Last modified
8/24/2016 8:13:21 PM
Creation date
11/23/2007 1:12:27 PM
Metadata
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Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
General Documents
Doc Date
7/1/2004
Doc Name
Collum Work Plan
Permit Index Doc Type
General Correspondence
Media Type
D
Archive
No
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Work plan D R A F T <br />3.2 Surface water hydrology <br />9 <br />Previous work in the Collom area has been conducted to characterize local streams, <br />springs, and seeps including: <br />• Colowyo Alluvial Valley Floor Analysis Report by Dames and Moore, <br />December 1995. <br />• Jurisdictional Waters Report Executive Summary, Seep and Spring <br />Survey Wetlands and Waters of the US Survey, Good Spring Creek <br />Jurisdictional Wetlands Survey and Riparian Habitats Survey, Study <br />Area C by JBR Environmental Consultants, September 1998. <br />Information from these studies will be used for surface water baseline. Additional work <br />will include installation of Parshall flumes at upstream and downstream locations near <br />the alluvial wells to measure streamflow. Crest stage gages may also be installed to <br />help identify peak flows. Preliminary surface water monitoring locations are shown on <br />Plan 1. Table 3.3 shows preliminary flume sizes for each of the monitoring locations. <br />Table 3.3 Preliminary flume sizes for surface water monitoring sites <br />Station Drainage Throat Depth Max Min <br /> area width flow flow <br /> (sq mi) tin) (in) (cfs) (cfs) <br />Upper Straight 6.3 12 18 5.6 0.35 <br />Lower Straight 7.0 12 18 5.6 0.35 <br />Upper Collom 4.0 12 18 5.6 0.35 <br />Lower Collom 5.1 12 18 5.6 0.35 <br />Lower Little Collom 2.9 12 18 5.6 0.35 <br />Upper West Jubb 0.5 9 15 3.1 0.07 <br />Lower West Jubb 1.6 9 15 3.1 0,07 <br />Surface water quality analytes are summarized below in Table 3.4. Field parameters <br />including flow, pH, EC, Dissolved Oxygen (DO), and temperature and will be measured <br />monthly on perennial streams and perennial springs and seeps. Water quality samples <br />will be collected quarterly from perennial streams, springs, and seeps. Surface water <br />samples will be analyzed for both total and dissolved metals for the first year. <br />2572-R7 Colowyo Coal Company, L.P. <br />Wa[er Management Consultants <br />
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