My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2009-04-22_PERMIT FILE - C1981019A
DRMS
>
Day Forward
>
Permit File
>
Coal
>
C1981019A
>
2009-04-22_PERMIT FILE - C1981019A
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 3:45:47 PM
Creation date
5/11/2009 1:52:46 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981019A
IBM Index Class Name
Permit File
Doc Date
4/22/2009
Section_Exhibit Name
2.05 Operations and Reclamation Plans
Media Type
D
Archive
Yes
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
44
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
View images
View plain text
RULE 2 PERMITS <br />Sedimentation pond removal is discussed in Section 4.05. <br />The location of all proposed sedimentation ponds and diversion structures to be constructed within the <br />permit area are shown on the Hydrology - North Map (Map 11) and the Hydrology - South Map (Map <br />12). These maps also show the locations of watershed boundaries from which, along with other sources, <br />the design criteria were established. Generally, ponds and spillways were sized and placed according to <br />such hydrologic factors as required sediment storage volume, rate of flow and volume of flow for the <br />appropriate storm event. <br />Pond embankments, slopes, spillways and construction methods have been designed according to such <br />engineering factors as structural integrity and stability, slope and surface stability; adequacy in height, <br />size and shape to provide sufficient volume for sediment and detained water and selection of proper <br />spillways and outlet devices, passing of design storm events and proper outflow rates. All ponds have <br />been designed under the direction of a qualified, registered professional engineer. <br />The purpose of the sedimentation ponds is not only to provide a final measure to prevent additional <br />contributions of sediment outside the permit area, but also to provide a means of <br />compliance with all applicable effluent limitations, especially with respect to total suspended solids or <br />settleable solids, as required. <br />The effluent quality is regulated by Section 4.05.2 and by the National Pollutant Discharge Elimination <br />System (NPDES) Permit. The NPDES Permit was issued by the State of Colorado Department of Health <br />under the National Pollutant Discharge Elimination System, established as a result of the Clean Water Act <br />(33 U.S.C. Section 1251, et. se a•). A copy of the approved NPDES Permit is found in Exhibit 7, <br />Hydrology Information. <br />The engineering parameters for the various sedimentation ponds are included in Exhibit 7, Hydrology <br />Information. The engineering design parameters for the various diversion ditches are also included in <br />Exhibit 7, Hydrology Information. Cross sections for the sedimentation ponds and the designs for the <br />emergency and primary spillways are shown in Exhibit 7, Hydrology Information. <br />With the construction of the Streeter Fill and the future development of the West Pit, the original <br />drainages have been relocated as shown on the Post Mining Topography (Map 19). The details of these <br />permanent diversions are set forth in Exhibit 12, Experimental Practice Information, and Exhibit 7, <br />Hydrology Information. Note that for continuity the "Experimental Practice" information in the permit is <br />left intact to provide a historical record of the Streeter Fill which is now an excess spoil fill built to meet <br />the standards of Rule 4.09 <br />Rule 2 Permits 2.05-10 Revision Date: 6/23/08 <br />Revision No.: MR-91
The URL can be used to link to this page
Your browser does not support the video tag.