Silver Bow Creek

Silver Bow Creek. It is a roughly 26-mile-long tributary of the Clark Fork River in southwestern Montana, originating near Butte and flowing northwest to its confluence near Ramsay. The creek's watershed has been profoundly shaped by over a century of intensive hardrock mining and smelting activities from the Butte mining district, leading to its designation as part of the largest Superfund site in the United States. Extensive environmental remediation efforts, managed by the EPA and the Montana Department of Environmental Quality, have been ongoing for decades to restore its ecological function.

Course and geography

The creek begins near the Continental Divide in the Rocky Mountains southwest of Butte, within Silver Bow County. It flows initially through the urban area of Butte, passing landmarks such as the Berkeley Pit, before continuing northwest through a valley alongside Interstate 90. The stream traverses the community of Ramsay and enters Deer Lodge County, where it converges with Warm Springs Creek to form the headwaters of the Clark Fork River. The surrounding terrain is part of the Northern Rocky Mountains physiographic province, characterized by semi-arid landscapes historically dominated by mining infrastructure and tailings.

Environmental issues and restoration

The creek is the namesake and central component of the Silver Bow Creek/Butte Area Superfund site, administered under the federal Comprehensive Environmental Response, Compensation, and Liability Act. Primary responsible parties, including the Atlantic Richfield Company and later BP, have been involved in cleanup operations following litigation by the United States Department of Justice. Major restoration projects have included the removal of millions of cubic yards of contaminated tailings and sediments, reconstruction of the stream channel, and restoration of floodplains. These efforts are coordinated with the Natural Resource Damage Program and guided by a Record of Decision from the EPA.

History and human impact

The discovery of rich mineral deposits, including copper, silver, and gold, in the Butte mining district in the late 19th century transformed the watershed. Intensive operations by companies like the Anaconda Copper Mining Company led to widespread construction of smelters, mills, and concentrators along its banks. The area was a focal point of labor history, including the Copper Kings feud and events surrounding the Butte, Montana labor riots of 1914. For much of the 20th century, the creek effectively functioned as an industrial drain, severely altering its hydrology and biology and impacting downstream communities like Ramsay and the Clark Fork corridor.

Water quality and pollution

Historic pollution is characterized by severe contamination from acid mine drainage, heavy metals such as arsenic, cadmium, copper, lead, and zinc, and elevated concentrations of sulfate. The primary sources were the Butte Hill mines and the Anaconda smelter complex. These pollutants caused aquatic life toxicity, degraded groundwater, and created hazardous conditions documented in studies by the United States Geological Survey. Ongoing water treatment, including facilities like the Metcalf Tailings Pond and the Butte Mine Flooding Operable Unit, aims to mitigate contaminant loading. Water quality is monitored under the Clean Water Act and Montana's state standards.

Recreation and access

Following decades of remediation, some segments of the corridor now support recreational use, primarily within restored areas like the Butte Greenway trail system. Activities include limited fishing in restored stretches, birdwatching, and hiking along paths that follow the creek. Public access points exist near Butte and Ramsay, often integrated with interpretive signage detailing the area's mining history and restoration. The creek remains part of a larger recovering ecosystem within the Upper Clark Fork River basin, with recreation balanced by ongoing Superfund site management and access restrictions in active cleanup zones.

Category:Rivers of Montana Category:Tributaries of the Clark Fork River Category:Superfund sites in Montana