My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2022-09-06_REPORT - C1982056 (3)
DRMS
>
Day Forward
>
Report
>
Coal
>
C1982056
>
2022-09-06_REPORT - C1982056 (3)
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
9/8/2022 12:42:23 PM
Creation date
9/7/2022 11:13:24 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
9/6/2022
Doc Name Note
2021 Annual Hydrology Report Text
Doc Name
Annual Hydrology Report
From
Twentymile Coal, LLC
To
DRMS
Annual Report Year
2021
Email Name
TNL
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.
/
31
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
Foidel Creek Mine C-82-056 2021 Annual Hydrology Report <br /> Mining related dewatering impacts were previously noted for the Fish Creek sandstone wells <br /> 91 M001 and 91 M004 (Figure 30), and the Ashley well (Figure 31). Wells 91 M001 and 91 M004 <br /> were undermined in 1995 and exhibited historic water level declines corresponding to mining <br /> activity. Water levels in these wells have subsequently stabilized, exhibiting only seasonal <br /> fluctuations. Two natural springs (SW-1 and SW-2) are monitored in the same vicinity as 91 M001 <br /> and 91 M004, although neither SW-1 nor SW-2 flowed during the report period. The Ashley well <br /> was undermined in 1999 and exhibited water level declines corresponding to mining activity. A <br /> water level could not be collected at the Ashley well during the 2021 report period. <br /> No unusual observations are noted with respect to Foidel Creek, Fish Creek, or Trout Creek <br /> alluvium groundwater levels. Water quality at the proposed point of compliance wells (008-AV-2, <br /> 008-AU-3, 008-AT-1) generally meet the agricultural use groundwater standards. The iron <br /> exceedances at well 008-AT-1 will be observed in the future. See Section 3.2 for additional <br /> discussion. <br /> Surface Water: <br /> Typical flow patterns were seen in Foidel Creek, Fish Creek, Middle Creek and Trout Creek in <br /> 2021, with spring runoff accounting for the peak flows. TC is still working to develop stream rating <br /> curves for the surface monitoring locations. No new flow meters were installed in 2021. TC <br /> implemented in house staff for stream gaging during 2017. <br /> Both Middle Creek site 29 and Foidel Creek site 900, upstream of point 29, had elevated field <br /> conductivities and TDS concentrations during the report period. It is unclear what caused this <br /> elevated reading. See Section 3.3 for additional discussion. Water quality at the other stream <br /> monitoring points was typically within the historic range observed at each of the sites and no other <br /> water quality impacts of concern were evident at the stream points during the 2021 report period. <br /> Spoil Springs: <br /> Spoil spring 303-1 (303 series). The 2012 reclamation at the Fish Creek Tipple, resulted in the <br /> loss of two smaller associated springs in the 303 series (303-2 and 303-3). Site 303-1 did not <br /> contribute a significant portion of discharge from the TC mine area and discharges from <br /> sedimentation ponds predominately occurred in conformance with applicable CDPS permit <br /> 28 <br />
The URL can be used to link to this page
Your browser does not support the video tag.