Laserfiche WebLink
<br />David Berry <br />October 8, 1990 <br />Page Six <br /> <br />1. In general, the water quality analysis provided in the AHR is reasonable. We are <br />concerned that the possible trend of increasing salts on Foidel Creek may not be <br />due solely to lower than normal flows. The slight increase on Trout Creek is also <br />of interest. Future monitoring results will be evaluated as they become available. <br />CYCC Response: <br />Cyprus believes that recent small increases in dissolved solids and conductivity are due <br />to causes unrelated to Cyprvs's mining activities. They are instead due to regional <br />climatic changes. Please note that there have also been small increases in dissolved solids <br />and conductivity at the upstream sites on Trout Creek (Station 301, Middle Creek <br />(Station 700), and Fish Creek (Station 16). <br />MLRD CONCERN: <br />The appearance of an artesian condition at Well 006-82-74C is interesting. [t is also <br />interesting to note that the water quality (total dissolved solids) resembles that of spoil <br />spring water. <br />Please provide a more detailed analysis of this well. [s there any relationship between <br />this well and pumping into the Area 2 pit? Are there any water quality data for the <br />years prior to 1987, if so please submit the information. Are there any water level data <br />for the 1984-1987 gap? If so, please provide it. Is there any chance that completion <br />problems are allowing the well to intercept a shallower groundwater system? <br />CYCC Response: <br />Since 006-82-74C is completed in the Wadge Overburden immediately down-gradient of <br />spoils it has been affected by the high dissolved solids plume migrating down gradient <br />from the spoils. This was predicted in the permit. <br />The artesian conditions are due to the low topographic position of the well and its <br />proximity to upgradient resaturated spoils. <br />MLRD CONCERN: <br />3. The water quality analysis (Page 7) states that the applicable stream standard for <br />manganese is 1000 mg/1, (total recoverable). In fact, the Classifications and <br />Numeric Standards, Upper Colorado River Basin and North Platte River (Planning, <br />region 12), Triennial Review, September 5, 1989, indicate a standard of 1.0 mg/1 <br />