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(Table 52), no new maximum or minimum values were recorded. At site 1005 (Table 53) one new maximum <br />• value was recorded for total recoverable zinc. <br />Middle Creek: Two surface sites on Middle Creek were historically utilized for monitoring flow. Site MC-1 is <br />located upstream of any mining activities and site 700 is located downstream of any mining activities. Flows at <br />site 700 (former USGS Station 09243700) were monitored by TCC in 2003. Note that sites MC-1 and 700 were <br />both eliminated from monitoring in early 2003, per TR03-42. Refer to previous AHRs for POR data. <br />Site 29, located on Middle creek below the confluence with Foidel Creek, continues to be monitored. 2003 data <br />is provided in Table 73. Figures 110 through 112 provide graphical representations of water levels and selected <br />water quality parameters recorded at site 29. <br />The historical summary of flow rate data for selected surface sites is presented as Table 59. This table also <br />provides flow summary information for discharge sites 62, 109, and 115. <br />3.4 Spoil Spring Monitoring <br />General]y, 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 TCC spoil spring <br />monitoring program was initiated in 1986 and is conducted annually. In accordance with the approved plan, [he <br />e• 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. Two spoil spring sites, 7 and the 303 series (303-1 through 303-3), require monitoring under <br />Exhibit 14-10. In addition to the spoil spring monitoring requirements, Spring 7 is monitored quarterly for field <br />parameters, and satnpled on asemi-annual basis for water quality (if flowing). The 303 Spring series is <br />monitored/sampled semi-annually for field parameters and water quality. During the 2003 Water Year, flow was <br />observed for approximately 3 days (in late May) at spoil spring 7 (Table 60). <br />Tables 61 through 63 provide summaries of the 2003 Water Year data collected at each 303 series (303-1 through <br />303-3) spoils spring. Table 61a provides a period of record statistical summary of collected data at site 303-1. <br />Figure 113 provides a graphical representation of period of record field conductivity for spoil spring 303-1. 2003 <br />water quality parameters for series 303-1 are typically within previously established ranges. <br />3.5 Natural Spring Monitoring <br />One natural spring, 20-14, was eliminated from any further monitoring requirements per TR03-42. Monitoring at <br />the site was initiated in 1987 and flows have historically been minor, and have been nonexistent for the past few <br />years. As such, no 2003 data table has been provided for this site. POR data may be found in previous AHRs. <br />• Two natural springs, SWl and SW2, located over previously mined areas in the Southwest Mining District <br />required monitoring during 2003. Per TR03-42, semiannual flow, field parameters, and water quality samples are <br />13 <br />