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' lion of several elevated pH readings at various NPDES locations. All elevated pH <br />readings were reported to the Colorado Water Quality Control Division. <br />The continued dry conditions and summer drought have reduced the number of active <br />discharge sites after the spring runoff season. All surface water flows continue to <br />decrease. There was one storm event exceeding the intensity of a 10-year, 24-hour <br />event. Storm-related runoff associated with a precipitation event in July recorded 19.4 <br />cfs of water down Coyote drainage. However, due to the exceptional capacity of Coyote <br />Dam all runoff was contained with no discharge through our NPDES point. <br />Drainageway reconstruction and stabilization, plus other water channelization and <br />velocity decreasing practices have reduced the sediment loading and erosive potentials <br />across the mined areas at Trapper. <br />2.7 Spoil Spring Sampling <br />During 1989 we conducted the annual spoil spring inventory across our mined land <br />boundaries. This survey is required by Section 4.8.5.2a of the permit. The survey was <br />made April 17th-20th. <br />Results of the 1989 survey revealed no spoil springs that meet the 5 gpm criteria. In <br />1988 only one spoil spring (Cottonwood) exceeded the 5 gpm criteria. However, due to <br />lower-than-normal precipitation in 1989, even the Cottonwood spring flowed c 5 gpm. <br />~~ <br />2.8 Monitoring Well Abandonment <br />Trapper requests Division approval to abandon three inactive groundwater monitor <br />wells during 1990. Abandonment will comply with Colorado regulation (4.07.3(2,3} and <br />previously approved abandonment procedures specified in TR#32 (1987). <br />The wells proposed for abandonment were designated sites GA-3, GA-4 and GA-5. <br />These wells have been temporarily abandoned by Trapper since 1977. Wells GA-3 and <br />GA-4 were installed in October and December, 1974, as part of the EIS baseline pro- <br />gram. Well GA-5 was drilled in the spring of 1975. All three wells were drilled to moni- <br />tor the QR coal seam aquifer near the coordinates of 406,000 N and 1,417,700 E. Two <br />active monitoring wells (GA-1 and GA-2) are still monitored quarterly as per our <br />approved permit (Section 4.8.5.2a). <br />The reason for abandonment is to allow construction of a safety truck runaway ramp <br />above the haulroad switchback referred to as the "S-curve:' Construction is proposed <br />for 1990. <br />Wells GA-3 and GA-4 were replicates of Well GA-1. They were monitored from instal- <br />lation until August, 1977. See baseline quality data in Section 2.7.5.2. Well GA-5 was <br />never monitored as the initial drill hole collapsed above the zone of perforation prior to <br />~, caking installation. No data exists. <br />Trapper proposes the Division approve this abandonment as part of this annual report. ~ <br />