The Michael Sullivan papers document two important historical preservation projects in the Bellingham and Whatcom County area, both conducted during Michael Sullivan’s tenure as Historic Preservation Planner for the Whatcom County Park and Recreation Board. The collection also contains various research and reference materials on Whatcom County pioneers and places gathered by Mr. Sullivan during his career.

Sullivan's papers include personal and official records generated during the Whatcom County Historical Preservation Survey. The project was planned and carried out during the years 1978-1980, and aimed at identifying sites in Whatcom County with historic significance to be considered for placement on the county register of historic places. Materials include the administrative records of the project’s advisory board, personal papers and notes of Michael Sullivan who directed the project, forms generated during the actual carrying out of the project, and various photographs and slides depicting buildings that were considered for historical designation in the Whatcom County area.

The collection also includes documentation of the Vintage Bellingham Survey organized by the Whatcom County Arts Commission and led by Michael Sullivan. These records contain informational materials distributed to participants of the survey as well as the completed forms from the following Bellingham neighborhoods: Lettered Streets, Sehome, South Hill, and the York District.

In the course of his work, Sullivan collected research and reference materials regarding Whatcom County pioneers. These materials comprise newspaper clippings and biographies of important Bellingham and Whatcom County characters, Sullivan's personal research notes, diaries and notes of Henry Roeder and extensive information on "Dirty" Dan Harris.

Research and reference materials on Whatcom County history includes newspaper clippings, correspondence, personal notes, photographs, and negatives.