
The International Smelting and Refining Company site was placed on the National Priority List in July of 2000. Atlantic Richfield Company, a potentially responsible party at the site, conducted studies to characterize waste on and around the site. Atlantic Richfield and the regulatory agencies evaluated a variety of clean up options.
In the early 1900's, when International Smelting and Refining (IS&R) began looking for a place to build a smelter, the mouth of Pine Canyon in the Tooele Valley was considered ideal. It was believed that predominant westerly winds would carry stack emissions up the canyon and away from Tooele City. It was also thought to be an ideal site because it was near large ore (copper) supplies. In addition, it was near the main-line railroad. Ore from the east side of Oquirrh Mountain was brought to the site by aerial tramway and the 4.36 mile long Elton Tunnel. The original IS&R operations consisted of approximately 1200 acres of land located on a broad bench at the mouth of Pine Canyon. The Carr Fork Milling Operations were located on 12.5 acres within Pine Canyon.
Copper, lead, and zinc ore mining and processing occurred over a period of about 70 years. Historically, the site included:
Mine workings |
Smelter area |
Mill site Tailings |
Slag pile |
Impoundment |
Settling pond |
Landfill area |
Isolation Cell |
Refining operations began in 1910. From 1910 through 1972, IS&R operated a copper and lead smelter. In the early years, tailings, slag, and flue dust were produced at an annual rate of 650,000 tons per year.
During this time, 326 acres of tailings were covered or disposed of on site. The copper smelter was closed in 1946. The lead smelter was closed in 1972, and was demolished during the years 1972 - 1974.
In 1974, Anaconda constructed and operated a copper mine and mill known as the "Carr Fork Operations". It was located just east of the IS&R Smelter Site in Pine Canyon. It was in operation from 1974 - 1981. (Atlantic Richfield purchased Anaconda in 1977.) As part of the Carr Fork Operation, a new tailings dam along the western edge of the original tailing site was constructed.
The mine stopped production in November 1981, while Anaconda waited for copper prices to rise. When this did not happen, the processing facilities were torn down, sold, and removed from the property in late 1984.
The Carr Fork Operation property was sold to Kennecott Copper in October 1985. This included the mine and mill along with several acres of land east of the smelter site. It excluded the settling and tailing ponds, currently owned by Atlantic Richfield. |