2015-10-14_REPORT - C1982056

• Permit No: C1982056
• IBM Index Class Name: Report
• Doc Date: 10/14/2015
• From: DRMS
• To: Twentymile Coal Company
• Annual Report Year: 2014
• Permit Index Doc Type: Hydrology Report
• Email Name: JLE
• Email Name: DIH
• Media Type: D
• Archive: No

UK
Table 10 of Exhibit 32 indicates for the 2009 to 2015 water
years, average Conductivity levels (umhos/cm) would be
934, 409 and 322 for lower Middle Creek, Lower Fish Creek
and Lower Trout Creek respectively. Data from Sites 29 for
Middle Creek, 1003 for Fish Creek and 69 for Trout Creek
indicate average conductivity levels (mg/L) of 1296.62,
924.07 and 649.06 respectively.
SAR Level:
Page 2.05-154 indicates water with an SAR below 10 is
considered low hazard. Foidel Creek, Fish Creek, Trout
Creek and Middle Creek; SAR levels were below 10. The
highest projected SAR level for Trout Creek below Fish
Creek was 2.4, during 2014 the SAR levels were below the
maximum projected levels.
Sulfate:
For Trout Creek below Fish Creek, Page 2.05-155 indicates
that during low flow period the sulfate level may exceed 250
mg/l sulfate material damage standard. On March 31, 2014
the report indicates site 1005 which monitors this segment of
stream was frozen and the sulfate levels were 290 mg/1. The
sulfate levels dropped below these levels as flow was
measured the rest of the year.
Table 10 of Exhibit 32 indicates for the 2009 to 2015 water
years, average Sulfate levels (mg/L) would be 366, 148 and
123 for lower Middle Creek, Lower Fish Creek and Lower
Trout Creek respectively. Data from Sites 29 for Middle
Creek, 1003 for Fish Creek and 69 for Trout Creek indicate
average Sulfate levels (mg/L) of 557.85, 298.30 and 216.30
respectively.
Total Dissolved Solids(TDS):
Table 10 of Exhibit 32 indicates for the 2009 to 2015 water
years, average TDS Levels (mg/L) would be 797, 402 and
314 for lower Middle Creek, Lower Fish Creek and Lower
Trout Creek respectively. Data from Sites 29 for Middle
UK