My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2024-06-25_PERMIT FILE - C1980007A (4)
DRMS
>
Day Forward
>
Permit File
>
Coal
>
C1980007
>
2024-06-25_PERMIT FILE - C1980007A (4)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
3/14/2025 12:49:14 PM
Creation date
7/30/2024 9:59:11 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980007A
IBM Index Class Name
Permit File
Doc Date
6/25/2024
Doc Name
pg 2.05-101 to 2.05-199
Section_Exhibit Name
2.05.5 & 2.05.6 Post-Mining Land Uses and Mitigation of Surface Coal Mining Operation Impacts
Media Type
D
Archive
Yes
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
52
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
West Elk Mine <br /> <br />2.05-113 Rev. 06/05- PR10, 03/06- PR10, 05/06- PR10, 11/060- TR107, 04/07- TR108, 09/07- PR12, 02/08- PR12; 11/10- MR372; 10/20- MR-452; <br /> 12/20- TR149; 12/21- TR150, 1/24-TR152 <br />Springs, Aquifers, and Ground Water Wells <br />Map 37 and Exhibits 71 and 71A provide information on the springs located within the mining <br />areas. Most springs likely have sources from local aquifers in surficial material (debris flows, <br />colluvium, and possibly alluvium). <br />In contrast to surface water containment structures, such as reservoirs, ponds, streams and <br />ditches, springs and aquifers may have water sources that are either in bedrock beneath the <br />blanket of clay-rich surficial material (debris flows, alluvium, and colluvium), or have a source <br />from within the surficial material. Subsidence may affect a spring or aquifer source located in <br />bedrock, whereas effects may or may not be expected where the spring source is within the <br />surficial material. Tension cracks produced in sandstone bedrock during the subsidence process, <br />for example, may divert water to a lower rock layer and therefore change the flow location. <br />However, local aquifers in permeable zones, which are interlayered with clay-rich zones <br />(Wasatch clays) in the surficial deposit, may yield to tensile stresses without cracking. There is <br />no field documentation known to Mr. Dunrud to either support or refute this statement. Annual <br />Hydrology Reports submitted to the CDRMS each year provide monitoring data and note <br />potential impacts from mining. <br />Springs <br />Decreed Spring 21 is located within the areas of mining influence of longwall panels LWE5, <br />LWE6, and LWE16 in the NE¼ of Section 5, (Township 14 South, Range 90 West). Maximum <br />tilt and strain is expected to occur in this area, because it is located above the projected <br />haulageway and barrier pillar to the haulageway. The overburden depth at this spring site to the <br />E seam is about 650 feet. <br />Springs mapped in the South of Divide mining area, which have been found flowing at every site <br />visit, include: 1) a spring located 800 feet west, southwest of the Minnesota Reservoir dam - <br />outside the area of any planned mining influence; 2) a spring located along Dry Fork 700 feet <br />west of the confluence of Poison Creek and Dry Fork, above longwall panel E2 in about 650 feet <br />of overburden to the E seam; 3) Deep Creek Spring over Panel E3; 4) the 96-2-2 Spring over <br />Panel E4; and 5) a spring located south, and outside of the area of influence of longwall panel <br />E8. <br />Of the springs mapped, Deep Creek Spring over Panel E3, the 96-2-2 Spring over Panel E4, the <br />decreed Spring 21, and the spring located along Dry Fork and above longwall panel E2 (J-7), <br />were projected to be impacted by longwall mining. The source of decreed Spring 21 may be a <br />local aquifer in bedrock of the Mesaverde Formation, whereas, the source of the spring along <br />Dry Fork (above longwall panel E2) is likely to be a local aquifer in colluvium or alluvium <br />derived from debris flows. The Deep Creek Spring and the 96-2-2 springs are in colluvium in <br />Deep Creek. <br />Aquifers <br />Horizontal strain produced during subsidence could impact local water-bearing bedrock beneath <br />the blanket of clay-rich surficial material. It also may impact local aquifers in surficial material, <br />where permeable and saturated zones are stratigraphically positioned in zones of tensile strain. <br />Impacts may occur for long periods of time where the aquifer is located above mined boundaries
The URL can be used to link to this page
Your browser does not support the video tag.