2017-05-08_REPORT - C1982056 (3)

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saw values return to historical values. 2016 saw some spring spikes in total recoverable iron concentrations (e.g. sites 2 /A and 1003). This may be related to erosion from rapid snow irk It. TC will continue to monitor this. New surface sites SW -13, SW -14, and SW -15 (Tables 43-45, Figures 66-77) indicated elevated concentrations for total recoverable (TR) iron in early June 2003, however iron concentrations dropped dramatically (about an order of magnitude) by August 2003. This is typical for historical seasonal fluctuations, with spikes often seen during high runoff period, most likely relating to fresh erosion. Trout Creek: Three surface flow monitoring sites on Trout Creek are utilized. Site 301 is located on Trout Creek above the confluence with Middle Creek. Site 69 is located on Trout Creek below the confluence with Middle Creek. Site 1005 (established in 1994) is located downstream of the confluence with Fish Creek and is monitored in conjunction with alluvial well 008 -AT -1. Tables 46 through 48 provide summaries of the 2016 Water Year data collected at Trout Creek surface flow sites. Tables 46a and 48a provide historical summaries of collected data at sites 301, 69, and 1005. Figures 92 through 101 provide graphical representations of water levels and selected water quality parameters recorded at each site. For the most part, typical seasonal flow patterns were observed. Water quality parameters for these sites are typically within previously established ranges. Middle Creek: 2016 data for site 29, located on Middle Creek below the confluence with Foidel Creek, is provided in Table 49. An historical summary of water quality data is provided in Table 49a. Figures 106 through 108 provide graphical representations of water levels and selected water quality parameters recorded at site 29. Water quality parameters for these sites were typically within previously established ranges. TC anticipates making a revision request in 2017 to move the location of site 29 upstream. At this time bulls are kept in the area, and present a safety hazard. 3.4 Spoil Spring Monitoring Generally, groundw ter migrates along bedding planes, faIts, joints, or fracture zones. Given adequate head pressure, if these zones of water migration intercept the s rface, a spring or seep results. The TC spoil spring monitoring program was initiated in 1986 and is conducted Lnually. In accordance with the approved plan, the annual mine wide survey is conducted during May, with springs measured for flow and field parameters. If a spring is discharging at or above 35 gallons per minute, it is monitored for the next year in accordance with the monitoring plan. A few samples are typically collected each year eveniwhen the 35 GPM mark is not met. Two spoil spring sites, 7 (Twentymile Pit Pond) and 303 (in Fish Creek Tipple area), require monitoring under Exhibit 14-10. In addition to the spoil spring monitoring requirements, Spring 7 is monitored quarterly for field paraeters, and sampled on a semi-annual basis for water quality (if fl wing). In 2016, site 7 flowed the second third huarters of the 2016 water year. The 303 spring series (303-1 thrlough 303-3) are monitored/sampled semi- annually for field parameters and water qualm . The 303 springs series 303-2 and 303-3 were all dry in 2016, �nd have been dry since 2012, when the Fish Creek Tipple area was reclaimed. Tables 50 provides a summaries of the 2016 Water Year data collected at the 303 spoils spring site. 13