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REV11657
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REV11657
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Entry Properties
Last modified
8/25/2016 1:22:37 AM
Creation date
11/21/2007 10:25:06 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019
IBM Index Class Name
Revision
Doc Date
7/6/1999
Doc Name
COLOWYO COAL CO LP C-81-019 MR 62 RESPONSE TO CDMG 04/16/1999 ADEQUACY LETTER
From
COLOWYO COAL CO
To
DMG
Type & Sequence
MR51
Media Type
D
Archive
No
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<br />Pond Name Q(cfs) V(fps) Depth of Flow(ft.) <br />Stockpond G 0.1 0.19 0.38 <br />Stockpond H 0.09 0.18 0.37 <br />Stockpond I 0.09 0.18 0.37 <br />Stockpond J 0.19 0.27 0.46 <br />Stockpond K 0.17 0.25 0.45 <br />Stockpond L 0.29 0.34 0.53 <br />Stockpond M 0.34 0.37 0.55 <br />As one can see, even with an analysis using a much narrower channel bottom, the design flows <br />are very minimal in terms of flow volume, flow velocity and depth of flow. According to the <br />model, the spillways can readily handle the design flows and will not overtop the structures. The <br />surface area of the ponds are minimal and overtopping by waves should present no problem as <br />wave action should be very minimal to non-existent. The slopes of the stockponds will be <br />covered with vegetation to reduce the potential for erosion. <br />Item 4 -Livestock access <br />The attached Permit page 4.05.8 has been modified to reflect the availability of 4h:1v areas for <br />livestock access. <br />Item 6 - As-Built Table <br />A copy of the most recent summary table (dated September 15, 1998) is included herein for <br />inclusion into Exhibit 7, Item 11 -Small Depressions/Tanks. The summary table will be updated <br />and submitted to the Division within 45 days after the new ponds are constructed. The updated <br />table will include the depth of the emergency spillways. <br />Colowyo would be pleased to discuss this revision with the Division at your convenience should <br />you so desire. Please contact me if you have any questions. <br />Sincerely <br />~U <br />J mes A. Kier <br />Attachments <br />xc: S. Hinkemeyer <br />Moffat County Clerk and Recorder <br />USDI, BLM, Little Snake Resource Area <br />files <br />
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