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Ann Arbor, Michigan based hydraulic engineer known for his multiple arch dams, hydroelectric plants, and for developing the Hazen-Williams hydraulic tables, designed and consulted on numerous water power and dam projects. Papers include biographical files, material relating to construction of dams and power plants on the Huron River and elsewhere, and papers relating to Michigan Engineering Society.

The papers of Gardner Williams, 1900-1931, include biographical material; papers relating to the history of Michigan Engineering Society; project files detailing construction of Huron River power plants and dams at Argo, Barton, Geddes, Superior, and French Landing; other Michigan project files for dams and plants in Sault Ste. Marie and elsewhere; Detroit Edison consultation materials; engineering reports by, or including comments of, Williams; and photographs.

The Williams papers came from the offices of Ayres, Lewis, Norris and May, Ann Arbor engineering firm. Obviously a fragment, they cover only the period of 1900 to 1931, with photographs spanning the dates 1900 to 1945.

The collection begins with a folder of biographical material and a folder regarding the history of the Michigan Engineering Society. Except for these, the collection divides into four series: Power Plants and Dams, the Detroit Edison Company, Engineering Reports, and Photographs.

The Ludwig Family Papers document the lives of members of the Ludwig family from the time of their arrival in the United States of America in 1733, through 1985. This collection includes family histories, scrapbooks, and family photographs. Also included in the collection are both personal and professional papers of Claud Cecil Ludwig, Frederick E. Ludwig, and Ruby Newman Ludwig.

The Ludwig Family record group covers a period of time from the 1850s to the 1980s. The collection of information documenting the history of the Ludwig family includes family histories, ancestral charts, and a large collection of photographic materials. The diaries and scrapbooks included in the collection describe everyday life during the periods covered. The collection is particularly strong in documenting the lives of Claud Cecil Ludwig and Frederick E. Ludwig.