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<br />" <br /> <br />l <br /> <br />" <br /> <br />C;,~J <br /> <br />I <br />\......-t <br /> <br />. _........~~\ <br />-"I,); _ . <br />C:" vI I .'.7'0... <br /> <br />:1 <br /> <br />State of <br /> <br />Colorado <br /> <br />'.' <br /> <br />Project No. F-33-R-3 <br /> <br />Name Water Pollution Studies <br /> <br />] <br /> <br />Period Covered: March 1, 1967 to December 31, 1967 <br /> <br />J <br /> <br />>~bl <br /> <br />ABSTRACT <br /> <br />1 <br /> <br />This report cover. th~ results of studies on the pollution effect on <br /> <br />] <br /> <br />Colorado streams or rivers caused by effluents of the mining and milling <br /> <br />industry . <br /> <br />I <br />j <br /> <br />INTRODUCTION <br /> <br />Water resources in the State of Colorado are becoming more widely <br /> <br />utilized by industry, agriculture and recreation to keep pace with a rapidly <br /> <br />f <br /> <br />expanding population. As the demands of both industry and agriculture in- <br /> <br />crease, the use of water for fish production and fishing recreation are <br /> <br />I <br /> <br />diminished. In the State of Colorado, we nOH have many miles of streams <br /> <br />.' <br />, <br />, <br />. <br />~ <br /> <br />which are severely damaged by chronic pollution from industries. <br /> <br />. In the high mountain streams I 1-112 no't.J' have pollution from mines and <br /> <br />mills processing lead, zinc, gold, silver and other metals. The demand for <br /> <br />these metals, especially silver, has resulted in new interest and activity <br /> <br />1 <br />J <br /> <br />among silver interests to open some of the old mines which have been inact- <br /> <br />ive for many years. In a number of these areas, the streams have recovered <br /> <br />I <br /> <br />from past damage and nO'1 support a fine fishery. It is the concern of the <br /> <br />1 <br /> <br />Colorado Game, Fish and Parks Department to maintain these areas and prevent <br /> <br />their destruction by future pollutants. <br /> <br />Existing and operating mills are currently polluting many miles of <br /> <br />streams, and we have been annlY7.ing these wnters to determine the extent of <br />