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-2- <br />• no discussion or projections will be made in this report concerning this <br />data. This information is supplied for the sake of completeness only. <br />Ground Water Quality <br />Appendix IV contains all of the .quality data and field parameter data <br />for the following ground wells and springs: Hole No.l, Hole No.3, Hole No.4, <br />Hole D-lA, Hole D-2A, Loadout Well #1, Loadout Well #2, Loadout Well #3, <br />Spring SP-1 and Spring SP-2. <br />Last year the quality of water in Hole 1 was getting worse every time <br />it was sampled. As will be noted in Appendix IV, the quality of this water <br />on December 31, 1985, was still very bad. After talking with the Division, <br />it was determined that the sampling techniques that were being used to <br />obtain water from this well needed to be modified. In the past, approximately <br />10 to 15 tubes of water were taken from the hole prior to obtaining a sample <br />for the lab. Due to the extreme depth of this hole, this was not enough <br />water removal. Snowmass personnel devised a new sampling system that <br />allowed approximately 1} times the well volume to be evacuated in a very <br />short time. As can be seen on June 11, 1985, the water quality in this <br />well was very similar to the pre-permit mean data after proper evacuation <br />of the well. It appears that the mine is having no effect on this well. In <br />the future, Snowmass will continue to adequately evacuate all ground water <br />monitoring wells prior to obtaining a sample. <br />Diagramsl and 2 are attached to show Piezometer M-1 in relation to <br />mine workings in the Thompson Creek No. 1 and No. 2 Mines. Diagram 1 is <br />a portion of Map D-3-4 from the permit application. The mine workings in <br />the No. 1 and No. 2 Mines near M-1 are shown on this diagram. Diagram 2 is <br />a cross section through the mines and M-1 as noted by the cross section line <br />A-A on Diagram 1. Amine map of the No. 2 Mine shows all development higher <br />than the portals, therefore, the only water stored in the mine appears to be <br />at the portals where dirt was shoved in. The drill log on the hole shown <br />in Appendix 3-D of the permit application indicates that the water level may <br />be affected by any zone below the grouted surface plug. <br />In order to determine if Snowmass' refuse pile is having any effect <br />on the alluvial ground water, a comparison between the quality of water in <br />wells D-lA and D-2A needs to be performed. By doing this, it is apparent <br />that the levels of Calcium, Magnesium, Sulfate and Dissolved Solids are <br />higher in Well D-lA than in well D-2A. However, by looking at the pre-permit <br />mean data and standard deviations, all of these elements are consistent with <br />the data obtained prior to construction of the refuse pile. It appears that <br />the refuse pile is having no effect on the local ground water. <br />All of the data for the other monitoring wells is consistent with the <br />pre-permit data. <br />Mine Inflows <br />Appendix V contains data from this year's mine inflow study. Due to the <br />very wet winters we have experienced in the last few years, the No. 1 and <br />No. 3 Mines had their greatest inflows of water. This large inflow caused <br />flooding problems in No. 3 Mine and caused the abandoned "B" seam above the <br />