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David Berry <br /> October 8, 1990 <br /> Page Four <br /> MLRD CONCERN: <br /> Water Quality <br /> 1. The salt levels in Foidel, Middle and Trout Creeks are of <br /> concern, Increases may or may not be due solely to low runoff. <br /> The possible trend will be assessed as more data becomes <br /> available. The Division will also be evaluating appropriate <br /> threshold levels for salinity values for the surface waters <br /> of northwest Colorado. <br /> CYCC Response: <br /> Cyprus believes that the recent small increase in dissolved solids <br /> and conductivity are due to causes unrelated to Cyprus' mining <br /> activities. They are instead due to regional climatic patterns. <br /> Please note that there have also been small increases in dissolved <br /> solids and conductivity at the upstream sites on Trout Creek <br /> (Station 301) . Middle Creek (Station 700) and Fish Creek (Station <br /> 16) . <br /> MLRD CONCERN: <br /> 2 . Please submit a revised Figure 19, which more clearly labels <br /> the symbols being used. <br /> CYCC Response: <br /> A revised Figure 19 is enclosed. <br /> Should you have any questions concerning this submittal , please <br /> contact me at your convenience. <br /> Sincerely, <br /> Marcus A. Middleton <br /> Environmental Specialist <br /> MAM:dg <br /> Enclosures <br />