Oliver Iron Mining Company's first location at Soudan, St. Louis County

Oliver Iron Mining Company's first location at Soudan

Oliver Iron Mining Company’s first location at Soudan, St. Louis County, 1884.

Tower-Soudan Mine, lower level

Tower-Soudan Mine, lower level

Soudan Mine, lower level, 1963.

Walker Art Gallery; T.B. Walker standing on Grand Stairway, Minneapolis

Walker Art Gallery; T.B. Walker on Grand Stairway

T.B. Walker standing on the grand staircase of the Walker Art Gallery, Minneapolis, c.1925.

T.B. Walker Art Gallery, 807 Hennepin Avenue, Minneapolis

T.B. Walker Art Gallery

T.B. Walker Art Gallery, 807 Hennepin Avenue, Minneapolis, c.1890.

Thomas B. Walker

Thomas B. Walker

Portrait miniature of T.B. Walker, c.1920. Artist: W. Patterson.

Hydro Plant near Hennepin Island, Minneapolis

Hydro Plant near Hennepin Island, Minneapolis

Hennepin Island Hydro Plant, designed by William de la Barre, January 22, 1908.

Lower Dam Hydro Plant and Lower Dam, St. Anthony Falls

Lower Dam Hydro Plant

Lower Dam and Lower Dam Hydro Plant, St. Anthony Falls, designed by William de la Barre, c.1898.

Newly constructed Lower Dam Hydro Plant, Minneapolis

Newly constructed Lower Dam Hydro Plant

Newly constructed Lower Dam Hydro Plant, designed by William de la Barre, December 9, 1896.

West side canal at St. Anthony Falls during construction, Minneapolis

Canal at St. Anthony Falls during construction

West side canal, engineered by William de la Barre, under construction, c.1890. Photographer: Henry R. Farr.

Washburn A Mill, Minneapolis

Washburn A Mill, Minneapolis

Photograph of the Washburn A Mill, designed by William de la Barre, c.1882. Photographer: Henry R. Farr.

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