silver bow creek/butte area

BUTTE TO MILLTOWN RESERVIOR

The boundary of the Silver Bow Creek/Butte Area site begins above Butte, near the Continental Divide, and extends westward along Silver Bow Creek to and including the Warm Springs Ponds (a treatment area). The site covers about 26 miles of stream and streamside habitat. Silver Bow Creek was used as a conduit for mining, smelting, industrial and municipal wastes for more than a hundred years. Vast mine tailings deposits are found along the creek. These deposits contain elevated levels of metals and have been dispersed over the entire flood plain. The site also includes the cities of Butte and Walkerville, as well as the Berkeley Pit and the interconnected mine workings. The Silver Bow Creek/Butte Area site is one of four contamination areas, jointly known as the Clark Fork Basin Sites. Others are Milltown Reservoir Sediments, Anaconda Company Smelter, and Montana Pole & Treating Plant. All are on EPA's National Priorities List.

Hazardous Ranking Score

64 / 100

A score of 28.5 or higher qualifies a site for the Superfund National Priority List.

Regional Contact

Region 8
Phone: (303) 312-6312

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Timeline

Discovery
Site Inspection
Preliminary Assessment
Final Listing On NPL
Removal

Contaminants & Health Effects

      Carcinogen
      Endocrine Disrupter
      Neurotoxic
      Sensitiser
      Reproductive Toxin
      Persistent, bioaccumulative and toxic
      VOC
      Mutagen

        Census

        White
        African American
        Asian
        American Indian and Alaska Native
        Native Hawaiian
        Other

        51

        People living
        within a 1 mile radius

        $85,320

        Average Income

        22

        Occupied homes

        Potentially Responsible Parties

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