Under Agassiz's management, the Calumet and Hecla mines rapidly increased production, and by 1870 were producing over half of the United States' copper.

[4] What is now the village of Calumet was settled when Hulbert began mining operations in 1864; it was originally under named "Red Jacket",[7] after the Native American Chief of the Seneca tribe.

[8] The company turned to other mines, as well as reclamation of ore from mill sands to produce copper; however, the profits were never near what they were in the earlier boom years of the late 19th century.

[3] In 1899, according to the Commissioner of Mineral Statistics, Calumet and Hecla produced "as much power as is now being generated by the great electric plant at Niagara Falls.

The company built low-cost but sound houses for employees in Calumet, and provided services such as garbage collection, repair work, a fire department, and water supply free of charge.

[3] Calumet and Hecla also built a library and school for their employees, as well as a hospital, swimming pool, and other social and utilitarian services.

[3] The early mining community reflected Upper Peninsula immigration patterns from the 1840s: the dominant group were Cornish miners, with Irish, German, French Canadian, and a few Scandinavian families mixed in.

[3] Calumet & Hecla sunk fifteen shafts along the lode; although the shafthouses have all been removed, numerous other mine-related buildings still stand in the area.

Significant remaining business and social-related structures built by the Calumet & Hecla Mning Company or its officers include structures include the company office building, town library, Alexander Agassiz's home, the Miscowaubik club, the bathhouse, and the Calumet Village School.

The industrial buildings are of vernacular architecture, primarily constructed of sandstone or red brick with grey mine rock foundations.

[3] These buildings are primarily rectangular, and are embellished with stock metal cornices, terra cotta trim, and cast iron thresholds and columns.

[3] Although a few structures have been lost over time, the commercial section of Calumet retains much of its historical integrity, with unified streetscapes and well-preserved vistas.

Along Red Jacket Road between the commercial section of Calumet and the mine location stands a cluster of churches, as well as the Union Building.

Agassiz Park, a wedge-shaped area east of the downtown and bordering on the mine property, was originally an open commons based on the Boston model.

[3] Many of these company homes are 2+1⁄2-story wood-frame houses, sided with clapboard or shingling, sitting on mine rock foundations and having a gabled roof.

[3] Much of the residential housing stock is relatively unchanged from original construction, save the addition of other siding materials and front porch renovations.