My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2010-05-07_PERMIT FILE - C2009087A (28)
DRMS
>
Day Forward
>
Permit File
>
Coal
>
C2009087A
>
2010-05-07_PERMIT FILE - C2009087A (28)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 4:11:41 PM
Creation date
6/3/2010 10:38:11 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C2009087A
IBM Index Class Name
Permit File
Doc Date
5/7/2010
Doc Name
DRAINAGE AND SEDIMENT CONTROL PLAN
Section_Exhibit Name
Exhibit 2.05.3-E2 Drainage and Sediment Control Plan
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.
/
29
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
Peabody Sage Creek Mine — Drainage and Sediment Control Plan <br />design/as -built plan hydrology /sedimentology demonstrations and pond and embankment <br />configurations can be found in the PAP as outlined in Table 2.05.3 -E2 -4, Index of Pond Design/As- <br />Built Demonstrations and Drawings. <br />All embankments will be less than 10 feet high (from the upstream toe of original ground to <br />emergency spillway invert elevation). Combined upstream and downstream side slopes of the <br />embankments are designed to be greater than 5H:1V, with neither slope steeper than 2H:1V. <br />Embankment top widths are generally 15 feet; all crests and outslopes will be vegetated with the <br />approved temporary seed mix. Pond 002 is completely incised — there is no embankment; it was <br />constructing by leaving a portion of the Wadge Pit highwall and letting the pit fill with water <br />PECOCO Pond was constructed by leaving a portion of the West Lennox Pit highwall open and <br />letting it fill with water; however, there is a low embankment of approximately five feet along the <br />northwest margin of this impoundment. <br />• <br />TABLE 2.05.3 -E2 -4 <br />Index of Pond Design/As-Built Demonstrations and Drawings <br />Pond /Sump <br />Hydrology / Sedimentology <br />Pond and Embankment <br />Demonstration <br />Configuration <br />002 <br />Appendix 2.05.3 -E2.A <br />Map 2.05.3 -E2.A Sediment <br />Pond 002 As -Built (2 Sheets) <br />003 <br />Appendix 2.05.3 -E2.B <br />Map 2.05.3 -E2.B Sediment <br />Pond 003 As -Built <br />004 <br />Appendix 2.05.3 -E2.0 <br />Map 2.05.3 -E2.0 Sediment <br />Pond 004 As -Built <br />PECOCO Pond <br />Appendix 2.05.3 -E2.13 <br />Map 2.05.3 -E2.D PECOCO <br />Pond Spillway Re-Design <br />Coal Stockpile Sumps <br />Appendix 2.05.3 -E2.E <br />Map 2.05.3 -E2.E Coal <br />Stock ile Sumps <br />Portal Area Sumps <br />Appendix 2.05.3 -E2.F <br />Map 2.05.3 -E2.F Portal Area <br />Sumps <br />The principal spillway for the Coal Stockpile Sumps are designed to safely pass the peak runoff <br />from the 10 -year, 24 -hour storm event. There will be no discharge through the emergency spillway. <br />The principal spillway will be protected by a wire -mesh trash rack. Combination (Pond 002 and <br />PECOCO) and emergency spillways (Coal Stockpile Sumps) were designed to safely pass the peak <br />flow from the 25 -year, 24 -hour storm event while maintaining a minimum of one (1) foot of <br />freeboard. The spillways are a trapezoidal open - channel and, with the exception of Pond 002, have <br />3H: IV side slopes. The combination spillway for Pond 002 is constructed in native material and has <br />side slopes of 2H: IV and 1H: 1V for the right and left side slopes, respectively. The Coal Stockpile <br />Sump emergency spillway design is conservative; it assumes the principle spillway(s) are inoperable <br />and the water level(s) are at the invert of the emergency spillway(s) prior to the storm event. The <br />Portal Area Sumps are a non - discharging system. There is a culvert structure that drains stored <br />water from Portal Sump #1 to Portal Sump #2. The top of the structure will be at approximately <br />6,675 feet — approximately 50 feet below the existing ground surface of the South Surface Facilities <br />Area. While the system does not need a spillway, the culvert linking the two sumps is designed for <br />• the 10 -year, 24 -hour precipitation event. A pump system will be installed to de -water the portal <br />area sumps to assure that there is adequate capacity to store runoff from the 10 -year, 24 -hour storm <br />event, as well as any mine water discharge. <br />2.05.3 -E2.10 <br />
The URL can be used to link to this page
Your browser does not support the video tag.