Consists mostly of Riverside Realty Company records (1917-1964) documenting the family development of a residential section of Grand Rapids. Most of the records are annotated plat maps but also included are several photographs, title abstracts and tax bills. Other records include those from the Russell Machine Company (1940-71), Mill Site Real Estate, Grand Trunk Railway Company property, the Dorgan plat, West Michigan Park Association correspondence concerning Russell's Ottawa Beach property, and stock certificates.