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2008-02-29_REPORT - C1982056
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2008-02-29_REPORT - C1982056
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Last modified
8/24/2016 3:23:51 PM
Creation date
2/29/2008 1:29:03 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1982056
IBM Index Class Name
REPORT
Doc Date
2/29/2008
Doc Name
2007 Annual Hydrology Report
From
Twentymile Coal Company
To
DRMS
Annual Report Year
2007
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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46) located near the Fish Creek Tipple. No unusual water level fluctuations were noted at any of these sites <br />during 2007. Similarly, conductivity values for these two sites were within historical ranges. <br />Trout Creek Alluvial Groundwater: There are two Trout Creek alluvial monitoring wells, 008-AT-1, and a <br />privately owned well (Jones well). Figures 48 through 51 provide graphical representations of water level and <br />field conductivity information to date. Tables 27 and 28 provide data for these wells. <br />Well 008-AT-1 is monitored in conjunction with surface water site 1005. Figure 48 depicts the water level <br />relationship between these two sites. Monitoring was initiated on Trout Creek Alluvial wells back in 1994. <br />Middle Creek Alluvial Groundwater: TCC has no active Middle creek alluvial wells. Two Middle Creek <br />alluvial wells (AVM-1 and AVM-2) were incorporated into the monitoring network during 1996, however, per <br />TR03-42, these wells were abandoned in the Fall of 2003. Refer to previous AHRs for earlier data. <br />3.3 Surface Water Monitoring <br />Monitoring/Samplin~ Requirements: Table 32 presents a summary of surface water monitoring frequencies, <br />which was last updated for Permit Revision 6 (PR 03-06 Exhibits 14-7 through 14-10) in March of 2004. Site <br />locations are shown on Figure 2 (a.k.a. Map 13A), Hydrologic Monitoring Plan of TR03-42 (as well as in Figure <br />2 of this AHR). Table A of Exhibit 14 specifies three seasonal monitoring episodes (i.e. October to February, <br />• March to May, and June to September), each of which are further divided into two general categories of sampling <br />frequency: 1) "Regular" monitoring that is done continuously, and 2) "Contingent" monitoring that is conducted <br />only when there is a discharge from underground mine pumping at surface discharge sites 109 and/or 115. Note <br />that discharge from these sites has not occurred in several years, and is not anticipated in the near future. <br />2007 surface water data is provided in Tables 33 through 49. Water quality parameters for these sites were <br />typically within previously established ranges, unless otherwise discussed below. An historical summary of data <br />has been provided in Tables 35a through Sla. <br />In the summer of 2007, TCC hired a contractor (Rivers Unlimited, Inc. of Steamboat Springs) to assist with re- <br />evaluating key stream bed locations, including rating curves for ongoing stream gaging. This study will continue <br />in the spring summer and fall of 2008. A discussion of the results will be included in the 2008 AHR. As noted in <br />several tables and figures, monitoring stream sites can be difficult due to continual damage of gage stations by <br />cows and other weathering effects. Many stations require repair on a regular basis. In 2008, TCC will be <br />upgrading many of these stations to better withstand damage. Flow meters may also be added at key locations. <br />Foidel Creek: Four surface flow monitoring sites on Foidel Creek (in the vicinity of the TCC 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 and is monitored in conjunction with alluvial well 001-S-5. Site 900 is <br />located further downstream on Foidel above the confluence with Middle Creek. Former site 304 was located <br />further downstream of 900. Site 304 was eliminated in 2003 per TR03-42. <br />9 <br />
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