[2] The Carnegie Library was built in Watertown in 1906 through a grant from the Carnegie Foundation and functioned as a library until 1967 when operations moved to a new building further east in town next to what was then the newly built Watertown Senior High School.

A youth group briefly occupied the Carnegie Library building before its use by the Codington County Historical Society.

[3] The museum is maintained by the Codington County Historical Society.

[2] They put out a bi-monthly publication for paid members entitled the Codington County Courier.

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