My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2010-02-02_REVISION - M1977211
DRMS
>
Day Forward
>
Revision
>
Minerals
>
M1977211
>
2010-02-02_REVISION - M1977211
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 3:59:14 PM
Creation date
2/3/2010 7:19:55 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977211
IBM Index Class Name
REVISION
Doc Date
2/2/2010
Doc Name
CGS Assessment
From
CGS
To
DRMS
Type & Sequence
TR14
Email Name
BMK
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.
/
4
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
STATE OF COLORADO <br />COLORADO GEOLOGICAL SURVEY- serving the people of Colorado <br />Department of Natural Resources <br />1313 Sherman Street, Room 715 <br />Denver, CO 80203 <br />Phone: (303) 866-2611 <br />Fax: (303) 866-2461 <br />DATE: February 2, 2010 <br /> <br />COLORADO <br />DEPARTMENT OF <br />NATURAL <br />RESOURCES <br />TO: Berhan Keffelew, Tony Waldron, David Berry <br /> Bill Ritter, Jr. <br /> Governor <br />FROM: Jon White, TC Wait <br /> James B. Martin <br /> Executive Director <br />SUBJECT: CGS assessment of a January 2010 Technical Revision of the Vincent Matthews <br /> <br />Pikeview Quarry Mine Plan Division Director and <br />State Geologist <br />At the request of the Colorado Division of Reclamation, Mining, and Safety (DRMS) the <br />Colorado Geological Survey (CGS) is providing this review of a proposed January 2010 <br />Technical Revision to the Pikeview Quarry mine plan. The purpose of the mine plan revision is <br />to permit the mine operator to remove unstable rock blocks. These blocks, shown as the south <br />and north blocks in Figure 1, did not fail completely in the December 2008 and September 2009 <br />rockslides. While definitely deformed and offset at the head scarp they have remained relatively <br />intact rock masses that have formed high, unstable cliffs that hang above the rockslide rubble <br />zone. A portion of the southern block is what failed in September 2009. Monitoring of the slide <br />by the operator from September 2009 into January 2010 indicates continued creep-type <br />Figure 1. Pikeview quarry rockslide after September 2009 reactivation (shown in red shading). <br />Dashed red line is the headscarp. Annotations are informal names of features referred to in this letter.
The URL can be used to link to this page
Your browser does not support the video tag.