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order of magnitude) by August 2003. This is typical for historical seasonal fluctuations, with spikes often seen <br />during high runoff period, most likely relating to fresh erosion. <br />Trout Creek: Three surface flow monitoring sites on Trout Creek are utilized. Site 301 is located on Trout <br />Creek above the confluence with Middle Creek. Site 69 is located on Trout Creek below the confluence with <br />Middle Creek. Site 1005 (established in 1994) is located downstream of the confluence with Fish Creek and is <br />monitored in conjunction with alluvial well 008 -AT -1. <br />Tables 46 through 48 provide summaries of the 2018 Water Year data collected at Trout Creek surface flow sites. <br />Tables 46a and 48a provide historical summaries of collected data at sites 301, 69, and 1005. Figures 92 through <br />101 provide graphical representations of water levels and selected water quality parameters recorded at each site. <br />For the most part, typical seasonal flow patterns were observed. Site 301 exhibited a historical low conductivity <br />value of 150 during 2017. Water quality parameters for these sites are typically within previously established <br />ranges. <br />In August 2018 a Call was placed on the Yampa River. This resulted in irrigation being turned down or off and <br />flows in Trout Creek increased substantially. <br />Middle Creek: 2018 data for site 29, located on Middle Creek below the confluence with Foidel Creek, is <br />provided in Table 49. An historical summary of water quality data is provided in Table 49a. Figures 106 through <br />108 provide graphical representations of water levels and selected water quality parameters recorded at site 29. <br />Water quality parameters for these sites were typically within previously established ranges. TC anticipates <br />making a revision request in 2019 to move the location of site 29 upstream. At this time bulls are kept in the area, <br />and present a safety hazard. <br />3.4 Spoil Spring Monitoring <br />Generally, groundwater migrates along bedding planes, faults, joints, or fracture zones. Given adequate head <br />pressure, if these zones of water migration intercept the surface, a spring or seep results. The TC spoil spring <br />monitoring program was initiated in 1986 and is conducted annually. In accordance with the approved plan, the <br />annual mine wide survey is conducted during May, with springs measured for flow and field parameters. If a <br />spring is discharging at or above 35 gallons per minute, it is monitored for the next year in accordance with the <br />monitoring plan. A few samples are typically collected each year even when the 35 GPM mark is not met. Two <br />spoil spring sites, 7 (Twentymile Pit Pond) and 303 (in Fish Creek Tipple area), require monitoring under Exhibit <br />14-10. In addition to the spoil spring monitoring requirements, Spring 7 is monitored quarterly for field <br />parameters, and sampled on a semi-annual basis for water quality (if flowing). In 2018, site 7 flowed the second <br />third quarters of the 2018 water year. The 303 spring series (303-1 through 303-3) are monitored/sampled semi- <br />annually for field parameters and water quality. The 303 springs series 303-2 and 303-3 were dry in 2018, and <br />have been dry since 2012, when the Fish Creek Tipple area was reclaimed. <br />Tables 50 provides a summaries of the 2018 Water Year data collected at the 303 spoils spring site. <br />