My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
REP10034
DRMS
>
Back File Migration
>
Report
>
REP10034
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 11:39:30 PM
Creation date
11/27/2007 12:18:15 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007
IBM Index Class Name
Report
Doc Date
8/21/1998
Doc Name
MOUNTAIN COAL CO AUGUST 1998 SEMI-ANNUAL SUBSIDENCE MONITORING REPORT PN C-80-007
From
DMG
To
JIM BURNELL
Permit Index Doc Type
SUBSIDENCE REPORT
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.
/
45
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
MOUNTAIN COAL <br />COMPANYL.L.t;. <br />A Subsidiary of Arch Western Resources, LLC <br />August 11, 1998 <br />Mr. Jim Burnell <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIVED <br />AUG 1 4 1996 <br />DIV. OF MINERALS <br />8 GEOLOGY <br />West Elk Mine <br />P O Boz 591 <br />5174 Highway 133 <br />Somerset, CO 81474 <br />(970)929-5015 <br />Faz (970)929-5595 <br />RE: 1998 Mid-Year Subsidence Report; West Elk Mine; Permit No. C-80-007 <br />Dear Jim: <br />Mountain Coal Company, LLC (MCC) completed the mid-year subsidence survey during August <br />1998. The information here-in provided is in the format approved by the Division as a result of <br />Minor Revision No. 96. Please find attached, two tables of the subsidence survey data for the <br />subsidence grid shown on Map 29 in MCC's permit. <br />The survey was conducted by Registered Land Surveyors of E. Schaaf and Associates, Inc., using <br />a Trimble 4000 Series Global Positioning System (GPS). Conventional survey equipment was <br />also utilized. <br />The results of the survey (see attached tables) show that very little movement has occurred since <br />the previous survey in October 1997. Maximum total subsidence continues to be within the range <br />of predicted subsidence (2.25 feet for F Seam, 7.97 feet for B Seam and 10.22 feet total) for F <br />and B Seam mining (Exhibit 60, Volume 13). <br />As reported previously and discussed with the Division, MCC intends to provide a revision <br />application to eliminate the grid shown on Map 29, as it is no longer providing useful data. MCC <br />has been surveying the Jumbo Mountain area and the two Northeast Panels using aerial <br />photogrammetric methods, as approved per PR #5. The aerial photo data collected for the Jumbo <br />Mountain mining area will be presented in the revision application as verification of the accuracy <br />of the photogrammetric methods. MCC plans to provide this revision application during <br />September 1998. <br />During the period October 1997 to August 1998, MCC completed longwall mining of the 1 ONE <br />and 11NE longwall panels (formerly known as the 1NE and 2NE panels). The longwall was <br />
The URL can be used to link to this page
Your browser does not support the video tag.