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observed during the spring. Discharge from Pond F ceased by the first of May. Three springs with flows <br />greater than 35 gpm were recorded at Mine I and Eckman Park. Spring D Comp serves as a composite <br />sampling point for the A, B, and C series springs at Eckman Park above Pond A. The flow data indicates that <br />the spoil springs follow the same pattern as the surface runoff: very low flow during most of the year and a <br />very rapid increase in flow during the spring runoff followed by a moderately rapid decrease in Flow. <br />2000 water quality data for spoil springs which were sampled for water quality are presented on Tables 31 <br />through 40. Tables 31a through 40a provide period of record statistical summaries for the monitored sites and <br />Tables 316 through 40b provide period of record flow summaries for the sites. <br />The data for the Mine 1 spoil springs shows a maximum field conductivity value of 3036 umhos/cm (Spring <br />1861500) during the 2000 water year. Spring 114 is typically the dominant influence in [his area during the <br />Annual Spring Survey. However, at the time of [he survey this spring, like many others, was not flowing. The <br />data for the Eckman Park spoil springs show a maximum field conductivity value of 4050 umhos/cm <br />(OVBITD) during the 2000 water year. During the winter when Foidel Creek flows are dominated by spoil <br />spring discharges, the creek's conductivity level approaches that of the spoil springs. The conductivity of the <br />spoil springs shows temporal fluctuations that most likely reFlect spoil recharge events of low TDS snowmelt. <br />The lowest TDS concentrations in the spoil springs typically occur during the Spring snowmelt period. <br />Figure 70 indicates that the water quality in Foidel Creek (Site 8) is influenced by the water quality of the <br />discharge from Pond A. Pond A receives the discharge of the largest spoil springs. The spoil spring 114 <br />discharge, which feeds site 87 (Pond F) is characterized by high TDS, calcium, magnesium, sulfate and SAR <br />compazed with bedrock groundwater, other spoil springs and unaffected surface waters. Station 114 also <br />shows comparatively high manganese and high nitrate levels. <br />Spoil spring discharges as measured from Mine I and Eckman Park totaled approximately 1.06 cfs during the <br />spring survey of 2000. <br /> <br />EFFLUENT MONITORING <br />A number of sedimentation control structures at Mine 1 are monitored. Of these only Stations 39 (Pond A), <br />and 84 (Pond D) had significant flows during the 2000 irrigation season. Stations 57 (Pond H), and 87 (Pond <br />F) showed no flows or minor Flows only during the spring runoff. Most of the Eckman Park and Mine 1 ponds <br />are in the Foidel Creek drainage, only Pond H (Site 57) is in the Middle Creek drainage. Pond D (Site 84) <br />receives runoff from the waste rock disposal area as well as runoff from the surface mine. In addition, mine <br />water from the Foidel Creek underground mine is also pumped to Pond D <br />Flows <br />The flow rate data for the effluent stations are summarized on Table 41. The historic discharge data for the <br />ponds with significant 2000 water discharges at Mine 1 are presented in Figures 64 through 75. Discharges <br />from these ponds are affected by seasonal variation in surface runoff and spoil spring flows. All of [he plats <br />show the typical seasonal variation with high Flows during spring runoff. Historically, discharges from the <br />ponds ceased in the summer and did not begin again until the next spring. Three ponds, A (Site 39), D (Site <br />84) and F (Site 87), began discharging year round in late 1984. This is due to the spoil springs located in the <br />drainages of Ponds A, D, and F and the past underground mine discharge [o Pond D. Sites 114 did not <br />discharge during 2000, and 87 experienced extended periods of no discharge during 2000. <br />During the 2000 irrigation period, Pond A exhibited a mean flow of approximately 0.89 cfs, Pond D 0.14 cfs <br />and Pond F 0.00 cfs. Pond F did not discharge signitcant amounts in the 2000 irrigation season, and has <br />shown a decreased flow since 1991, due to periodic pumping of the pond and Spring 114 for mine use. The <br />discharge from Pond D is shown on Figure 73. Flows from these ponds have changed Foidel Creek from an <br />CYCC2000.doc I/31/O1 7 <br />