My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
REP38906
DRMS
>
Back File Migration
>
Report
>
REP38906
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/25/2016 12:23:07 AM
Creation date
11/27/2007 8:13:28 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1980001
IBM Index Class Name
Report
Doc Date
7/11/2005
Doc Name
2004 AHR Review Memo
From
Byron Walker
To
File
Annual Report Year
2004
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.
/
9
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
minimize disturbance of the prevailing hydrologic balance in both the mine plan and adjacent <br />areas, and to prevent material damage to the hydrologic balance outside the pernsit area in <br />order to prevent long-term adverse changes in the hydrologic balance. <br />Information in the AHR indicates that surface (this mine is a surface mine) mining activities were <br />planned and conducted in compliance with this rule. The disturbance to the hydrologic balance <br />within and adjacent to the permit azea caused by mining and reclamation at the Edna Mine as <br />indicated in the AHR is the minimum that can be expected from a surface coal mining operation <br />at this location. Leachate discharges from the Edna Mine have occasionally elevated the <br />dissolved solids in Trout Creek. <br />Rule 4.05.1(2) Changes in water quality and quantity, in the depth to ground water, and in the <br />location ofsurface water drainage channels shall be minimized so that the approved postmining <br />land use of the permit area is not adversely affected. <br />The information in the AHR indicates compliance with this rule. The approved postmining land <br />use is rangeland [Permit Application Package (PAP) page 1.0-5]. <br />Rule 4.05.1(3) In no case shall Federal and State water quality statutes, regulations, standards, <br />or effluent limitations be violated. <br />This review indicates that the mine reclamation operation is in compliance with this rule. <br />Rule 4.05.12 Protection of Ground Water Recharge Capacity. <br />Surface coal mining operations shall be conducted in a manner that facilitates reclamation <br />which will restore approximate premining recharge capacity, through restoratiwt of the <br />capability of the reclaimed areas as a whole, excluding coal processing waste and underground <br />development waste disposal areas and fills, to transmit water to the ground water system. The <br />recharge capacity shall be restored to a condition which: <br />Information in the AHR indicates compliance with this rule. Coal was extracted by open pit <br />mining operations on the limb of a syncline. Premining bedrock units were exposed above the <br />area mined in cliffs and steep slopes formed by the Oak Creek valley. Premining recharge to <br />bedrock units was limited at these outcrops and relatively impervious near-surface units on a <br />mined synclinal limb. The mined overburden was backfilled to approximate original contour. <br />Recharge to groundwater has likely been enhanced, but to a small degree due to the impervious <br />nature of the seams and units, by sustained exposure of detained water in the bacl.<fill materials at <br />the interface with bedrock units at the mined pit low-walls and underlying bedro<:k unit. The <br />more gradual discharge of spoil springs, in lieu of the rapid premining surface runoff, likely <br />enhances rechazge of alluvial materials at the foot of the mined slopes. <br />Rule 4.05.12(1) Supports the approved postmining land use; <br />Page 2 <br />
The URL can be used to link to this page
Your browser does not support the video tag.