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These wells are shown on Map 1 lA, Well Locations for Eastern Mine District. A review of the wells listed in this
<br />exhibit indicates that the wells are relatively shallow. This is important, because the wells are completed in a local
<br />sandstone (presumed to be the Fish Creek sandstone) which overlies the massive Marine shale. Subsequent
<br />development in the NMD and WMD will not impact any known existing wells that are not owned by TC.
<br />SPRINGS AND SEEPS
<br />A spring and seep survey was conducted by TCC in the Fish Creek drainage during May 1986. The survey identified
<br />all significant discharges to Fish Creek and delineated the specific stratigraphic interval of bedrock discharges, where
<br />possible. The locations of these discharges are shown on Map 37, Fish Creek Ground Water Inflow Survey. Selected
<br />locations were measured for flow, temperature, specific conductance, percent salinity, and pH. The field data
<br />collected during the survey is shown on Table 60, Fish Creek Stream and Inflow Investigation. Flows were measured
<br />using a portable 4 -inch cutthroat flume, or a bucket and stopwatch. Field water quality was measured using standard
<br />instrumentation.
<br />The only significant spring identified during the survey was 20 -14, which issues from the Twentymile Sandstone and
<br />is located in Section 11, T5N, R86W. This spring was eliminated from the overall Hydrologic Monitoring program in
<br />May, 2003 (TR03 -42).
<br />The spring and seep survey, previously referenced, indicated two springs or seeps that could be affected by planned
<br />mining operations. The two springs, located in the north half of Section 36, T5N, R87W, appear to issue from the
<br />Fish Creek Sandstone, and were undermined in the SWMD. Monitoring data indicates the springs produce limited
<br />discharge, typically discharging at a rate of 5 gpm or less, and were not affected by mining. These two springs were
<br />added to TC's Hydrologic Monitoring Plan, and were monitored during and following active mining, on a quarterly
<br />basis for quantity and quality. Exhibit 14 was modified to include these springs.
<br />NMD and WMD (Panels 17 -Right through 24 -Right and 12 -Left through 17 -Left, PR03 -06, PR06 -07, and
<br />PR09 -08)
<br />Supplemental Shrine and Seep Surve
<br />Supplemental spring and seep surveys of the TC Permit Area were conducted by TCC during May, in 2002 and 2003.
<br />The surveys included an investigation of the NMD and WMD areas to identify potential discharges to Fish Creek.
<br />The locations of these discharges and other historical discharges are shown on Map 37A, 2003 Spring Survey.
<br />Discharge locations were measured for flow, temperature, pH and conductivity when adequate pooled water was
<br />available. The field data collected during the survey is presented on Table 60. 1, Northern Mining District Spring and
<br />Seep Survey. Flows were measured using a portable cutthroat flume or a bucket and stopwatch. Field water quality
<br />was measured using standard instrumentation.
<br />Generally, groundwater migrates along bedding planes, faults, joints or fracture zones. Given adequate head pressure
<br />and recharge, if these zones of water migration intercept the ground surface, springs or seeps develop. The NMD and
<br />WMD are located within the Twentymile Park synclinal basin. The dominant near - surface lithologic unit, which
<br />occupies most of the basin is the Lewis Shale, which can be upwards of 700 feet thick. The lack of significant
<br />bedding planes, faulting, or fracture zones in this area, may account for a general lack of springs or seeps in the central
<br />basin. In general, as documented by Table 60. 1, any springs or seeps identified by the spring and seep survey in the
<br />central basin are characterized by seasonal, low- volume flows, that may vary significantly from year to year
<br />dependent primarily on snowfall levels and the rate of spring snowmelt. Given the survey data and field observations,
<br />essentially all of the identified springs and seeps probably result from infiltration of snowmelt, and resulting shallow
<br />ground water flows along zones of lower permeability, to the point where these zones daylight on the sides of hills or
<br />in the numerous small ephemeral drainages in the area. Flows are typically of limited duration, drying -up within 30 to
<br />60 days of snowmelt.
<br />TR13 -83 2.04 -25 11/03/14
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