My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
REV99861
DRMS
>
Back File Migration
>
Revision
>
REV99861
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/25/2016 3:23:41 AM
Creation date
11/22/2007 12:31:11 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981008
IBM Index Class Name
Revision
Doc Date
8/28/1996
Doc Name
NEW HORIZON MINE PR-04 ADEQUACY REVIEW C-81-008
From
DMG
To
WESTERN FUELS COLO
Type & Sequence
PR4
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
5
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
<br />33. Generally, SEDCAD+ calculations and pond design appeaz to meet the <br />requirements of the applicable Rules. However, pit pumpage is planned, yet no base <br />flow was used in the hydrology and sedimentology calculations. Given the rather <br />short hydrograph detention time (9 hours), the Division requires more information <br />on the volume and rate of pit pumpage and how this may affect the pond <br />performance. <br />34. the ditch inlets, as proposed to be located, would appear to require that the <br />SEDCAD+ modelling use a dead space input of 50% rather than the 30% used. <br />Again, since the detention time is relatively short, the operator should evaluate pond <br />performance with this increased dead space or relocate the ditch irilets to the pond. <br />35. Rule 2.10.3(1)(j) requires a map showing the affected area. <br />36. Page 2.05.3(3)-4 Paragraph 2 states the freeboard will vary from 0.0 to 5 feet for the <br />collection ditch. Minimum freeboard fora 25 year ditch is 0.5 feet, therfor the <br />permit needs to be changed. <br />37. The Two proposed stock pond designs need to include cross sections of the pond, <br />embankments and spillways. Please provide these on the drawings. <br />38. Section 3.02.2 -Please revise the bond estimate to refect a new worst case scenario <br />and include it into the permit and then replace the the existing bond with the new <br />one. <br />Should you have any questions or need additional information, please contact me. <br />Sincerely, <br />~~~. <br />Harry B. Ranney <br />Environmental Protection Specialist <br />
The URL can be used to link to this page
Your browser does not support the video tag.