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2.13 During the normal <br />the quantity of "low flow" month <br />water diverted has of August, <br />varied from <br /> a low of l~.i~ cfs in 1974, 1976. 1977, and 1979 <br /> to a high of U.4U!i cfs in 197'x. The 30 year <br /> average is ~~.1~• c fs during July. The diversion <br /> records do not indicate any detect able impact <br /> as a result of mi ne inflows in 1981 and 1982. <br /> 2.2 Deertrail Ditch <br />x.21 The Deertrail Ditch has a decreed capacity of <br />J,BJ cfs and a diversion capacity of 3.S~~cfs. <br />2.~2 The 1972-I9H2 diversion records of the Division <br />of Water Resources indicate a year round use <br />of ci to 1.5 cfs and an irrigation season requirement <br />of approximately 1.0 to 4.ii cfs (including year <br />round use). <br />2.~3 The diversion quantity varied from a high of <br />5.0l~ cfs recorded in May of 1974 to a low of <br />i~.Q in August 1977. The records show that the <br />ma::imum diversion of water occurs during the <br />hiyh flow months of May and June with decreasing <br />quantities during July, August, and September. <br />During the "dry" years of 1976 and 1977 the volume <br />• of water diverted was e::tremely low due to a <br />lacL: of creel: water caused by two successive <br />dry years. The ~ 4Jest Main entries did not e:<tend <br />under Hubbard Creel; until 1981 and could not <br />have had any irt~pact during these "dry" years. <br />Examination of the diversion records for both ditches show <br />that the water diverted from Hubbard Creel:: varies considerably <br />within the irrigation season and widely from year to year. <br />The amount of water diverted appears to be related to the <br />available water stored in the snowpacl: in the higher elevations <br />and the rate of snow melt. Any impact from the underground <br />worLings would be minimal compared to variations in the <br />available water. <br />3. Hubbard Creel; has a fairly steep gradient 1n the area overlying <br />and near the mine workings, Measurements by U. S. Steel <br />Mining Co. indicate an average velocity of 104 ft, per <br />minute in the some ~!i!i0 ft. of creek 1n this area. based <br />on this measured velocity the water in the stream would <br />have a "dwell time" of '~9 minutes in the area near the <br />mine workings. This short "dwell time" near the mine workings <br />reduces the opportunity for diversion of water to the under- <br />ground warV.ings. <br />• It is the Operator's opinton that an enterception of the Hubbard <br />Greek flow into the mine would result in a mayor increase of <br />the inflow to the mine in this area and the chemical water analysis <br />2 <br />