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REP17983
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REP17983
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Entry Properties
Last modified
8/24/2016 11:46:55 PM
Creation date
11/27/2007 2:16:50 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
Report
Doc Date
7/2/2004
Doc Name
2003 Annual Hydrology Report
From
Twentymile Coal Company
To
DMG
Annual Report Year
2003
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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Alluvial deposits containing groundwater are monitored in the Foidel Creek, Fish Creek, Trout Creek and Middle <br />Creek drainages. In the Foidel Creek drainage, sites both upstream and downstream of the TCC portals and <br />support facilities are monitored. In [he Fish Creek Drainage, sites upstream and downstream of the Mine 2 area <br />and the Fish Creek Borehole mine dewatering facilities are monitored. <br />Foidel Creek Alluvial Groundwater: During 2003, five Foidel Creek alluvial wells, 009-5-10, 001-S-5, 008- <br />AV-2, FO-1, and FO-4, required monitoring for water levels and field parameters on a monthly basis, and water <br />quality sampling on a quarterly basis. An additional well, 008-AV-1 requires monthly monitoring only for water <br />levels and field parameters. Per TR03-42, field monitoring for wells 009-5-10, 001-5-5, 008-AV-1, and 008-AV- <br />2 was reduced to a quarterly basis, and water quality sampling to asemi-annual basis. Also approved under <br />TR03-42, wells FO-1 and FO-4 were deactivated and subsequently abandoned in September 2003. All <br />monitoring requirements were met at these sites. Tables 21 through 26 provide summaries of the 2002 Water <br />Year data collected at each site. Tables 21a through 26a provide POR statistical summaries of collected data at <br />each site. Tables 21b through 26b provide period of record water level summaries for each site. Figures 29 <br />through 37 provide graphical representations of water levels and selected water quality parameters recorded at <br />these sites. <br />Water levels during 2003 remained generally consistent with established ranges and patterns and showed the <br />typical seasonal variability of elevated water levels in the spring. Well 009-S-10 provides data for the alluvial <br />aquifer upgradien[ from the mine portals. Water levels in 009-S-10 for 2003 (Figure 29) are consistent with <br />• observed historical seasonal fluctuations. Conductivity values at well 009-5-10 (Figure 30) remain consistent <br />with historical values. <br />Well 001-S-5 is located just downgradient from the mine portals and surface facilities location, and is monitored <br />in conjunction with surface water monitoring site 8. Water levels in 001-5-5 for 2003 (Figure 31) are consistent <br />with observed historical seasonal fluctuations. Conductivity values at well 001-S-5 (Figure 32) had exhibited a <br />general increase since 1979, but appears to have leveled out since 2000. Figure 33 is indicative of the general <br />relationship between the alluvial groundwater elevations and surface water elevations at these two sites. <br /> <br />Wells 008-AV-1 and 008-AV-2 are monitored in conjunction with surface water site 304 at a point on Foidel <br />Creek approximately 1000 feet upstream of the confluence of Foidel and Middle Creeks. Figures 34 and 35 <br />provide POR conductivity data for these wells respectively. 2003 data was consistent with historical values. <br />Figure 36, provides POR TDS data for 008-AV-2. 2003 TDS values remain within historical ranges. Water <br />levels in these wells and the stream show the typical seasonal interrelationship of relatively rapid increases and <br />declines associated with spring runoff (Figure 37). The longer-term trends in water levels at these sites generally <br />parallel the Fluctuations observed in annual stream flows. <br />Field conductivity measurements in general at well 001-S-5 (on order of 2000 in 2003) were again noted to be <br />higher than the upgradient site 009-S-10 (on order of 1100 in 2003). Moving downgradient, field conductivities <br />at wells FO-1 and FO-4 were on the order of 2800 and 2700 respectively for 2003. Further downgradient, field <br />conductivities at well 008-AV-2 was on the order of 1700. Conductivity values at well 009-S-10 fluctuated <br />within previously established ranges during 2003. The generally increasing field conductivity trend, noted in <br />8 <br />
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