Alaska-Gastineau Mining Company

The Alaska-Gastineau Mining Co. had its offices in 25 Broad St., New York City, New York, USA. It was the operating company for the Alaska Gold Mines Co. in Alaska, USA. It worked the Alaska-Gastineau Mine/Perseverance Mine in the Silver Bow Basin, approximately 4 miles (6.4 km) from Juneau and processed its ore at an old remodeled mill and crushing plant at Sheep Creek. The property of the Alaska Juneau Gold Mining Co. adjoined the Alaska Gastineau on the west.

Around 1900, Joseph Gilbert bought the Perseverance claims and, with the assistance of Col. W. J. Sutherland, formed the Alaska Perseverance Mining Co. Their mill began operations in 1907. In 1910, the Alaska Perseverance Mining Co. was reorganized under the name of the Alaska-Gastineau Mining Co. The company incorporated in New York in 1911. In 1912, the Alaska Gold Mines Co. was organized as a holding company to finance the Alaska-Gastineau Mining Co., and large scale development of the mine commenced in July, 1912.

The mill was constructed in Thane. It was designed by George Bradley, who also designed the Utah Copper Company mill. Robert Semple began excavating for the foundations in November, 1913. Construction was under the supervision of Daniel C. Jackling, the original company's managing director. After 1910, Bartlett L. Thane, the mining engineer who pioneered hydroelectric power in Juneau, Alaska, became managing director. Charles E. Bruff was superintendent of machinery installation, while Charles Hayden was the company President.

The average number of employees during 1913 was 900. It was announced on Nov. 21, 1914, that the first section of the company's reduction works would be in operation after January 1, 1915. The first unit started up on February 18, 1915. By June 30, 1915, 4000 tons of ore were being crushed daily. The Alaska Juneau Mining Company purchased all of the Alaska-Gastineau Mining Co. properties and assets in 1934.