My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
PERMFILE125331
DRMS
>
Back File Migration
>
Permit File
>
300000
>
PERMFILE125331
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 10:22:45 PM
Creation date
11/25/2007 1:47:46 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Revision
Doc Date
12/2/2004
Doc Name
Exhibit 18B Evaluation of Potential Groundwater Inflows Associated with E Seam Mining
Type & Sequence
PR10
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.
/
77
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
Mayo and Associates, LC <br />'~ <br /> <br />1 <br /> <br /> <br />~. <br />Sandstone channels inflows will likely be minor, but persistent inflows associated with <br />faults such as the 14HG could be as great at 250-500 gpm. Similar inflow rates occurred <br />from sandstone channels in the Co-Op mine in the Wasatch Plateau. West Elk Mine <br />does not have a history of prolonged roof inflows, even though the Bowie Sandstone is <br />only located 50 feet above B Seam workings. Roof inflows of about 1,000 gpm in the <br />BEM azea of the B Seam were likely associated with the Bowie Sandstone; however the <br />inflows only lasted a few days. Most roof inflows into the E Seam should not persist too <br />long. <br />Fault related inflow from the underling Bowie Sandstone could be as great as those that <br />have been associated with the Rollins Sandstone in B Seam workings. However, the <br />relationship between the responses of the Bowie and Rollins Sandstones to fault damage <br />zones encounter during B Seam mining suggests that lazge and persistent inflows will not <br />occur. It is likely that most of the up gradient water in the Bowie Sandstone has been <br />previously dewatered during B Seam mining; however some perched water may remain <br />in the Bowie Sandstone. <br />potential groundwater inflows aze summarized in Table 2. <br />Although appreciable groundwater inflows aze not anticipated during E Seam mining <br />Potential groundwater inflow associated with the Mount Gunnison intrusion as well as <br />unexplored faults located near the intrusion aze less certain and should be evaluated more <br />Evaluation of Potential Groundwater Inflows <br />Associated with E Seam Mining, <br />West Ells Mine, Somerset, Colorado <br />February 24, 2004 <br />
The URL can be used to link to this page
Your browser does not support the video tag.