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The Ann Arbor Railroad Technical & Historical Society was incorporated on August 3, 1978 by Dave Mueller, Duane Sumner, and Don Wilson. It continued under that name for several years, but went through a reorganization in the early 1980's and was renamed The Ann Arbor Railroad Technical & Historical Association. It continues under that name today.

The organization grew from three members to over 300 members by 2001, and operates on a budget of $10,150 per year. It operates as a non-profit corporation under the laws of the State of Michigan, and has a sales tax license application pending. It is hoped the organization will become a Sec. 501c(3) entity under rules of the United States Internal Revenue Service in by 2002, allowing for tax write-offs of money or items donated to the organization.

Board meetings scheduled for 4 times a year normally March, May, August, Decemeber usual the first Saturday of the month.