Clark Fork Reclamation 



Demonstration Project 3-53 



Anaconda Minerals Company 



Reclamation 3-55 



SURFACE WATER QUALITY 3-56 



Introduction 3-56 



Historical Surface Water Quality Problems. . 3-56 



Silver Bow Creek 3-57 



Clark Fork 3-58 



Recent and Current Surface Water 



Quality Monitoring Programs 3-60 



Current Surface Water Quality 3-64 



Heavy Metals 3-65 



Suspended Sediment 3-74 



Other Water Quality Parameters 3-78 



EUTROPHICATION AND NUTRIENTS 3-84 



Excessive Algal Growth 3-8 4 



Nutrient Concentrations and Loading 3-86 



Silver Bow Creek 3-86 



Warm Springs Ponds 3-87 



Upper Clark Fork 3-88 



Middle Clark Fork 3-89 



Lower Clark Fork 3-91 



Aquatic Macrophyte Problems 3-91 



Additional Monitoring Efforts 3-91 



NONPOINT SOURCE POLLUTION 3-92 



Introduction 3-92 



Agriculture 3-93 



Silviculture 3-93 



Construction 3-95 



Urban Runoff 3-95 



Resource Extraction, Exploration, 



and Development 3-95 



Land Disposal 3-95 



Hydromodif ication 3-96 



NPS Problems in the Clark Fork Basin .... 3-96 



Upper Clark Fork Basin 3-96 



Middle and Lower Clark Fork Basin . . . 3-96 



Current NPS Programs 3-97 



DHES-Water Quality Bureau 3-97 



Silviculture Programs and Activities. . 3-98 



Agriculture Programs 3-100 



Resource Extraction Programs 3-101 



IV 



