My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2020-03-30_HYDROLOGY - M1981021
DRMS
>
Day Forward
>
Hydrology
>
Minerals
>
M1981021
>
2020-03-30_HYDROLOGY - M1981021
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
11/17/2021 3:07:19 PM
Creation date
3/30/2020 2:06:25 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1981021
IBM Index Class Name
HYDROLOGY
Doc Date
3/30/2020
Doc Name
Hydrogeology Report
From
Western Water & Land, Inc.
To
DRMS
Email Name
LJW
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.
/
77
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
SUNDAY MINE COMPLEX-HYDROGEOLOGIC REPORT <br /> measured at the SMC monitoring wells and water levels within the mines, and indicates a <br /> relatively flat hydraulic gradient exits for this groundwater system. <br /> 11.2 Groundwater Levels and Flow <br /> Groundwater level elevations are presented in Table 8-1 and in Graphs 8-1 thru 8-3. Initial water <br /> level measurements were associated with well development and completion. Later <br /> measurements were typically measured and recorded immediately prior to sampling at each <br /> well. Water level data indicate that confined conditions exist in MW-SUN1 and unconfined <br /> conditions exist at well MW-SUN3.The water levels in wells MW-SUN1 and MW-SUN3 indicate <br /> an initial drop in water levels during the period immediately after well construction, then a <br /> modest to significant rise in levels in the following months. Despite the data gap between <br /> September 24, 2014, and February 18, 2020, the levels imply that water levels have continued <br /> to rise since the wells were constructed. In well MW-SUN3, the early rise or oscillation in water <br /> levels is interpreted to be related to well development and purging associated with sampling <br /> events and reflects the slow recovery of the well. Water levels in wells MW-SUN1 and MW- <br /> SUN2 are similarly interpreted. Levels in wells MW-SUN1 and MW-SUN3 may still be rising; <br /> future monitoring may confirm this. Comparably, water levels in well MW-SUN2 appeared to <br /> have stabilized somewhat. Figure 11-1, prepared by EFR in 2013, is a cross section drawn <br /> through the three drill holes for MW-SUN1, MW-SUN2, and MW-SUN3. Note that the geologic <br /> units are shown within the drill holes and the lithology is shown in the cross section. <br /> With the available data and the hydrogeologic setting, the observed rise in water levels are <br /> interpreted to be related to well recovery in an aquitard of very low permeability. The relatively <br /> deep depth and confined nature of the Top Rim Sandstone of the Salt Wash Member precludes <br /> interaction with climatic influence in even a modest time period. The overlying Brushy Basin <br /> Member and underlying Summerville Formation are not expected to transmit significant <br /> groundwater to the Salt Wash units and lateral inflow is also expected to be small due to the <br /> somewhat hydraulically isolated nature of the study area. If water levels are related to recovery <br /> only, the extraordinary period of time involved (several years) further emphasizes the extremely <br /> low permeability of the Salt Wash Member <br /> Water levels in well MW-SUN2 appeared to have recovered to a relatively static level hundreds <br /> of feet higher in elevation compared to levels in wells MW-SUN1 and MW-SUN3. The levels do <br /> not appear to represent the Salt Wash Member. These water level elevations and the unusual <br /> inertia effects observed during slug testing indicate that well MW-SUN2 is probably hydraulically <br /> Western Water& Land, Inc. 40 <br />
The URL can be used to link to this page
Your browser does not support the video tag.