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2012-03-12_REPORT - C1982056 (2)
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2012-03-12_REPORT - C1982056 (2)
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Last modified
8/24/2016 4:55:04 PM
Creation date
3/12/2012 10:47:19 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
3/12/2012
Doc Name
2011 Annual Hydrology Report (1 of 2)
From
Twentymile Coal Company
To
DRMS
Annual Report Year
2011
Permit Index Doc Type
Hydrology Report
Email Name
JDM
DIH
Media Type
D
Archive
No
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at the back of this AHR. In 2008 and 2010 the consultants assisted with the temporary repair of some gage <br />stations. In 2011, four protective enclosures were constructed at historic flow meter recorder locations. New <br />recorders will be installed and activated at these locations in the spring of 2012. Additional flow meters may also <br />be added in 2012. <br />Foidel Creek: Four surface flow monitoring sites on Foidel Creek (in the vicinity of the TC mine portals and <br />facilities areas) are utilized. Site 800 and site 14 are located upstream of the portal. Site 8 is located a short <br />distance downstream of the portal area. Site 900 is located further downstream on Foidel above the confluence <br />with Middle Creek. Former site 304 was located further downstream of 900. Site 304 was eliminated in 2003 <br />per TR03 -42. <br />Tables 33 through 36 provide summaries of the 2011 Water Year data collected at each site. Tables 33a, 34a, and <br />35a provide POR statistical summaries of collected data at each site. Figures 52 to 59 and 102 to 105 provide <br />graphical representations of water levels and selected water quality parameters recorded at each site. Typical <br />flow patterns were exhibited at these sites with spring runoff periods accounting for the peak flows observed. At <br />all of these sites, the inverse relationship between flow and field conductivity continues to be evident. Water <br />quality parameters for these sites were within previously established ranges. An increase in conductivity at site 8 <br />has been noted over the last two years. This is attributed to increased discharge from Pond D, resulting from <br />overflows from the Area # 1 Pit (via DRMS site 7), which is partially fed by mine water as part of mine <br />dewatering operations for the old WMD and EMD. TC has been considering alternate treatment options for 10 <br />RT mine water. This may not occur until 2013 or later, depending on available funding. <br />Fish Creek: Nine surface flow monitoring sites are utilized on Fish Creek. Site 16A replaced site 16 in 2000, <br />and is located upstream of the Fish Creek Borehole discharge site 115. Historical data for site 16 may be found in <br />previous AHRs. Site 307 is located approximately one mile downstream of the Fish Creek Borehole mine <br />dewatering site and is monitored in conjunction with alluvial well 006 -AZ -3. Site 302 is located approximately <br />two miles downstream of the Fish Creek Borehole mine dewatering site. Site 305 is located upstream of the Fish <br />Creek Tipple and is monitored in conjunction with alluvial well 008 -AU -3. Site 27A is located immediately <br />upstream of the Fish Creek Tipple discharge (a.k.a. CDPS discharge site 62). Site 1003 is located downstream of <br />the Fish Creek Tipple site 62. <br />Monitoring requirements at sites 307 and 305 require monthly water level measurements (March through <br />September), and semi - annual field parameters. However, per PR03 -06, site 305 now requires semi - annual water <br />quality testing. <br />Three relatively new surface sites were added in conjunction with the new Fish Creek Alluvium well sites (AVF - <br />13, AVF -14, and AVF -15), in order to evaluate potential subsidence impacts in the area. These are surface sites <br />SW -13, SW -14 (both added in August 2001), and SW -15 (added in June 2002). These sites require quarterly <br />water level measurements (March through September), and semi - annual field parameters and water quality <br />sampling. May of 2011 saw Fish Creek overflowing its banks in many areas. Significant flooding occurred in the <br />area of these three wells, preventing access to the wells for water quality sampling and field measurements. <br />11 <br />
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