My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2011-09-26_PERMIT FILE - C1981012 (24)
DRMS
>
Day Forward
>
Permit File
>
Coal
>
C1981012
>
2011-09-26_PERMIT FILE - C1981012 (24)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/24/2016 4:43:23 PM
Creation date
11/3/2011 11:38:18 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981012
IBM Index Class Name
Permit File
Doc Date
9/26/2011
Section_Exhibit Name
EXHIBIT 08 HYDROLOGY AND GEOLOGY INFORMATION
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.
/
175
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 />31 <br />j Approximately 2 years of discharge data for the Allen and Maxwell Mines <br />• are tabulated in Appendix C, Table C1. The mean discharge from the Maxwell <br />` is 15 gpm which falls within the range shown in Table 4. The mean discharge <br />for the Allen Mine is 73 gpm. Comparison of the present Allen and Maxwell <br />discharges with those calculated in Table 4 suggests that a high degree of <br />confidence can be placed on the calculated discharges. This comparison also <br />indicates that the controlling hydraulic and geologic parameters at the <br />i Maxwell are very similar to those at the Allen. <br />Alluvial Studies <br />Investigation of the near-surface ground water along the Purgatoire <br />River in the study area was made by drilling 8 hales through the alluvium <br />to bedrock and the excavation of several backhoe pits. From the informa- <br />tion obtained, two cross sections, showing the alluvial and strath terraces, <br />were prepared and are shown on Plates 2 and 3 in the map pocket. The <br />locations of the sections are indicated on Plate 16. Of particular importance <br />to the hydrologic investigation is the fact that ground water was encountered <br />only in the alluvium directly in contact with the river and that the thickness <br />• , and lateral extent of this material is quite limited. <br />Three of the 8 holes were drilled and cased at the Allen htine and will <br />be discussed further in the context of the water quality investigations. The <br />remaining 5 holes were drilled at the Maxwell study area and three of these <br />wells were cased with perforated steel casing. The locations of the cased <br />wells are indicated on Plate 16 where it is shown that wells Al 3-3 and <br />AL 4-2 are on the upstream (west) and downstream (east) boundaries of the <br />Maxwell study area (respectively), immediately adjacent to the stream. Wells <br />AL 1-1, AL 1-2, and AL 2-1 are located in the immediate vicinity of the <br />active waste dump at the Allen Mine. <br />Auger hale tests were performed to determine the hydraulic onductivity <br />of the alluvial materials. The procedures for conducting and analyzing auger <br />hole tests are described in Bavel and Kirkham (1948) and in the National <br />Engineering Handbook, Section 16, United States Sail Conservation Service. <br />The auger hole data are presented in Appendix D, Table D1 through D3 and the <br />• ~ analyses are shown on figures 8 through 10. The hydraulic conductivity <br />
The URL can be used to link to this page
Your browser does not support the video tag.