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<br /> <br />, ,:= <br /> <br /> <br />o <br /><,' <br />c., <br />(t) <br />(.0., <br />"'-J <br /> <br />State and federal representatives in both the Upper and <br />Lower Colorado Regions agreed that the salinity improvement <br />programs outlined in the Upper and Lower Colorado Framework <br />Study documents would be part of a basinwide approach to <br />salinity management. The program outlined in this appendix, <br />therefore, is for that portion of a basinwide program that <br />could be located in the Upper Colorado Region. The salinity <br />improvement program suggested in this appendix consists of <br />a salt load reduction program which maintains concentrations <br />at Lees Ferry at about 600 mg/l during the study period. <br /> <br />Wastewater Treatment <br /> <br />f~: <br /> <br />Many improvements in municipal and industrial waste- <br />water treatment have occurred in recent years, especially <br />in the period from 1965 to 1970. Even with this progress <br />there still remains a need for further improvements in <br />wastewater treatment to control existing sources of <br />pollution. There is also a significant need for improved <br />operation and maintenance of existing wastewater treatment <br />systems, As a result of the expected population growth <br />and economic expansion, future discharges to municipal <br />and industrial wastewater treatment works are estimated <br />to triple--as measured by BOD--during the 1965-2020 period. <br /> <br />~ <br />k <br /> <br />':' <br /> <br />The sprawling construction of recreation homes and <br />commercial enterprises has resulted in the proliferation of <br />individual and small community disposal systems in some <br />recreation areas. Because of the rapid growth in recreation, <br />detailed basinwide water quality planning is urgently needed <br />in these areas. <br /> <br />i: <br /> <br />One of the most vexing problems in water quality <br />management is the overfertilization and alteration of the <br />aquatic system that results from the additions of excessive <br />amounts of nutrients, principally nitrogen and phosphorus <br />compounds. Although some nutrients reach waters from <br />agricultural runoff, municipal wastes contribute the <br />major load. Some problems have been noted in recreational <br />lakes of the Region where stringent control over the dis- <br />charge of nutrients may be required. <br /> <br /> <br />Mine Drainage <br /> <br />Drainage from abandoned and active mines is estimated <br />to eliminate some 120 miles of fisheries by pH reduction <br />and inflow of toxic minerals. The Animas River, Red <br /> <br />- ii - <br />