GROUND WATER QUALITY 3-102 



Introduction 3-102 



Historical Ground Water Quality Studies. . . 3-102 



Current Ground Water Quality 3-104 



Upper Silver Bow Creek Area 3-105 



Warm Springs and Opportunity Ponds. . . 3-108 



Floodplain Mine Wastes 3-109 



Warm Springs to Milltown Data 3-109 



Milltown Area 3-110 



Missoula Area 3-112 



Lower Clark Fork Basin 3-113 



FISHERIES, RECREATION, AND AESTHETICS 3-113 



Effects of Surface Water Quality 



Degradation 3-113 



Effects from Existing Hydropower 



Development 3-118 



Effects from Irrigation Projects 3-121 



Large Storage Projects 3-121 



Other Irrigation Projects 3-125 



Other Water Uses 3-127 



CHAPTER 4 FUTURE WATER NEEDS AND 



ACTIVITIES 4-1 



WATER RESERVATIONS 4-1 



Introduction 4-1 



Consumptive Water Needs 4-1 



Instream Flow Reservation Needs 



in the Basin 4-2 



Forest Service Instream Flow Needs 4-3 



IRRIGATION 4-4 



MINING 4-5 



New Butte Mining, Inc 4-5 



Pegasus Gold Corporation 4-6 



Cable Mountain Mine, Inc 4-7 



Sunshine Mining Company 4-8 



Montana Mining and Timber Company 4-9 



Mark V Mines, Inc 4-10 



American Eagle Mining Company 4-10 



ASARCO, Inc 4-11 



U.S. Borax 4-12 



FOREST PRODUCTS 4-13 



WATER AVAILABLE FOR FUTURE DEVELOPMENT 4-14 



Surface Water v. . . . 4-15 



Hydropower Water Rights 4-15 



Existing Water Rights 4-17 



