In 1983, this entire area was designated as a Superfund site by the Environmental Protection Agency, because of land, water, and air contamination resulting from a century of mostly unregulated silver and gold mining.

The company was capitalized with 1,000,000 shares, surrounding claims were acquired, and Edward F. Moffitt made manager.

In 1913, Hecla started sending ore to International Smelting and Refining Company in Tooele, Utah.

[2] In Oct. 1908, Frank Upman was elected president, he was succeeded by McCarthy in Oct. 1911, and the east ore body was discovered in Feb. 1912.

On 23 Sept. 1915, Hecla stock was listed on the New York Curb Exchange, and monthly dividends paid since March 1904, became quarterly in 1918.

In 1933, Hecla started developing the Polaris mine with a shaft, while buying the surrounding property, which included the Chester in 1936, and Silver Summit in 1935.

By 1948, Hecla owned 50% of Sullivan, 63% of Polaris (now merged with Silver Summit), and 33% of the Resurrection Mining Co., located east of Leadville, Colorado.

Randall worked on consolidating Hecla's balance sheet, selling its interest in Sullivan to Bunker Hill in exchange for stock, becoming the largest shareholder at 17.37% in 1955.

Hecla also sold off the Pend Oreille Lead Zinc Co. stock it had bought in 1945, while relinquishing Rock Creek claims, located southeast of Wallace, it acquired in 1946.

[2]: 117–118, 120–125 In 1958, Hecla started purchasing shares in Lucky Friday Silver-Lead Mines, eventually becoming the major owner at 38%.

In 1967, Hecla purchased 14% of Day Mines, Inc., becoming the largest stockholder, and reached an agreement to develop the Hunter Ranch through the Lucky Friday shaft.

Hecla thus acquired the Knob Hill gold mine near Republic, Washington, besides owning all of the Lucky Friday.

In 1986, Hecla opened its new corporate office north of Coeur d'Alene and Arthur Brown became president.

Settlement funds will be dedicated to restoration and remediation of natural resources in the Coeur d’Alene Basin.

The agreement, which was lodged in federal district court in Idaho today, brings closure to that lawsuit and establishes a strong basis for future cooperation between Hecla and the governments in the Coeur d’Alene Basin.

Due to COVID-19 in 2020 the site production decreased significantly, and was only able to produce about 2.0 million ounces[8] of silver that year.