Laserfiche WebLink
Appendix B <br />PROTECTION OF THE HYDROLOGIC BALANCE <br />BOWIE NO.2 MINE <br />COAL MINE WASTE DISPOSAL AREA N0. 2 <br />Notes for Calculations: <br />1. Pages 3 -10 present a spread sheet calculation of the required capacity of Sediment Pond F <br />based on the 10 year, 24 -hour event, and sizing of the emergency and embankment spillways. <br />Pages 11 -13 are SedCad pages which verify the water storage capacity required for Pond F. <br />Pages 14 -16 are the Structure Networking for the Pond F drainage area, and pages 17 -21 are <br />the Subwatershed Hydrology Details. <br />2. Page 23 shows the peak flow used to size the emergency and embankment spillways using <br />the 25 -year, 24 -hour event in the SEDCAD4 program. <br />3. Design points are shown on Figure 2. <br />4. Ditches were sized using SEDCAD4. Ditches were sized using the 100 year, 24 -hour event and <br />begin on page 24. <br />ENGINEER'S CERTIFICATION <br />The calculations and information presented on the following pages with dates of 07/13 were <br />prepared by me during the month of July 2013, and the information presented is true and correct <br />to the best of my knowledge and belief. <br />Tammeri <�SttglVer- Bisho Date <br />Registered % staaal► r <br />State of Colo I A <br />TR -81 App. B -1 07/13 <br />