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Cry`. [v'~ ~ a <br />''`` ,~ <br />LSm AFL ~~ K <br />NOV '? 1987 <br />~INhD LAND <br />':3ECLAMA~f!OiJ D1V~S!C`R <br />A hydrologic monitoring program was in <br />Somerset Mine located near Somerset, Colorado <br />This report includes data collected for the <br />August 26, 1987. Stations which were monitored <br />and H-10 and the Hubbard Creek surface station <br />ing data was collected onsite: <br />plemented at the <br />in January 1986. <br />Third Quarter on <br />include wells B-6 <br />H-1. The follow- <br />H-1 H-10 B-6 <br />Flow /water level 6.74 cfs 347.58 ft. No <br />Temperature 11.0 c 19.0 c Water <br />Conductivity 375 5200 <br />pH 8.7 8.4 <br />eH --- -1.34 <br />Ground water data was consistent with that collected over <br />the previous two quarterly samplings. No water was found in well <br />B-6. Additional water level measurements were attempted at well <br />B-7 to confirm the lack of water in that area of the mine, <br />however, the well casing was collapsed approximately 60 feet <br />below the surface and no measurement could be obtained. At well <br />H-10, water level increased by 0.09 feet from that measured in <br />June, 1987. Water quality remained consistent with previous <br />samplings. The water can be classified as a strong sodium- <br />bicarbonate type with elevated concentrations of dissolved <br />solids, alkalinity, and conductivity. The cation/anion balance <br />also indicated a highly mineralized water. Metal concentrations <br />of boron, fluoride, total iron and dissolved silica were also <br />elevated. The water was slightly turbid with small quantities of <br />oil and grease. <br />Water flowing in Hubbard Creek (Station H-1) decreased from <br />previous samplings indicating normal summer conditions. The <br />sampling was conducted following thunderstorms the previous day <br />which is reflected by the elevated levels of suspended solids and <br />turbidity. The water is a calcium-bicarbonate type with average <br />concentrations of nutrients. Metal concentrations were found to <br />be within normal ranges (with exception of total iron). <br />A sediment pond inspection is scheduled for September, <br />however, no discharges from any of the ponds has occurred over <br />the quarter to the date of this sampling. <br />