My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
REP42426
DRMS
>
Back File Migration
>
Report
>
REP42426
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/25/2016 12:44:18 AM
Creation date
11/27/2007 9:36:06 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981044
IBM Index Class Name
Report
Doc Date
7/1/1993
Doc Name
1991 ANNUAL HYDROLOGIC REPORT EAGLE 5 & 6 MINES PN C-81-044
From
DMG
To
BARBARA PAVLIK
Annual Report Year
1991
Permit Index Doc Type
HYDROLOGY 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.
/
3
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 />iii iiiiiiiiniiiiii <br />STATE OF O~LORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1313 Sherman Sl., Room 215 <br />Denver, CO 80203 <br />Phone: 1303) 866-7567 <br />FAX: (303) 832-8106 <br />Date: July 1, 1993 <br />To: Janet Binns <br />From: Barbara Pavlik <br />OF ~~Ip <br />R~ _ ~ <br />„~, b <br />`o <br />~ /8'16 ~ <br />Roy Romer <br />Governor <br />M¢hael B. Long <br />Drvmon Dnttlor <br />Re: 1991 Annual Hydrologic Report, Eagle 5 and 6 Mines, <br />Permit File No. C-81-044 <br />I have reviewed the groundwater portion of the above AHR and have <br />the following comments: <br />MONITORING HELLS <br />Groundwater Quantity <br />Trout Creek Sandstone - Groundwater levels in the Trout Creek <br />Sandstone have dropped approximately 25' - 50' from the baseline <br />levels but are beginning an upward trend. Past water level <br />declines may have resulted from previous mining in a downdip <br />section of the "F" seam when levels in the Trout Creek Sandstone <br />were higher. Pumping for water supply may also have: contributed to <br />the water level declines in this aquifer. Overall, the water level <br />declines observed in the Trout Creek Sandstone are consistent with <br />the PHC predictions. <br />operator to clarify how he arrived at this figure. <br />Middle Sandstone - Mining and associated subsidence have resulted <br />in a dewatering trend in the Middle Sandstone. The operator states <br />that the overall decline of water levels in this aquifer is <br />approximately 15'. Because of the extreme variation in water Level <br />declines throughout the Middle Sandstone, we may wish to ask the <br />In general, the water level fluctuations in the Middle Sandstone <br />appear to follow the migration of mining activitie~l. For example, <br />a 150' drop in the water level in Well 83-02 in 1989 appeared to <br />result from mine dewatering as mining approached tYle well. In the <br />same well, a 200' drop during late 1989 and early 1990 appears to <br />have resulted from subsidence. <br />The PHC predicted large areal declines of water levels in the <br />Middle Sandstone if fracturing connects the sanclstone with the <br />mine. It appears that this may be occurring in 'the vicinity of <br />
The URL can be used to link to this page
Your browser does not support the video tag.