The Hoy-Scott Watershed Society fonds consists of the records created and received by the Hoy-Scott Watershed Society and reflects its hatchery operations, salmonid enhancement and environmental stewardship programs, events, and environmental advocacy initiatives in the larger Coquitlam Watershed.

The fonds consists of administrative records, reports, correspondence, event planning files, newspaper clippings, newsletters, publications, plans, a scrapbook, promotional materials, and photographs documenting the activities of the Hoy-Scott Watershed Society and the operations of the Hoy Creek Hatchery in Coquitlam.

The fonds was arranged into four series by the archivist. See the Physical condition and Arrangement note below for more information.

This series consists of records that were original personal fonds and collections acquired and preserved by the Riverview Hospital Historical Society's during its existence. It contains the personal collections of nurses, doctors, general staff, British Columbia's first Provincial Botanist, and a patient at Riverview Hospital. Each file includes records such as study notes, photographs, ephemera, correspondence, newspaper clippings and pamphlets.

The series consists of 15 files, each corresponding to its original creator or donor: Ken Baker, Loretta Barnet, Ultan Patrick Byrne, Jean Campbell, Edna Colvin, John Davidson, Sheila Dumore, William Headridge, Alyce Hockin, Lois Kaldestad, Catherine Murray, Judy Pendry, Dorothy Pocock, Hazel Shepard, and Georgina Bernice Petty.

The series consists of photographs predominantly depicting events held by the Hoy Scott Watershed Society, including Salmon Come Home, Salmon Leave Home, Fry Releases, Trail Clean Ups, and field trips. The series also documents the habitat of Hoy and Scott Creek during different seasons as well as construction, excavation, and changes to the hatchery and rearing ponds.

Record types include a scrapbook, silver gelatin negatives in large format cellulose acetate sheets, silver gelatin DOP prints, chromogenic colour negative film strips, slides, and prints.

The collection consists of records gathered by Walter Bruce MacDonald as research materials and content for a biography of Roderick Charles (R.C.) MacDonald. Records include collected photographs of R.C. MacDonald and his family as well as newspaper clippings, photographs, pamphlets, programs, scrapbooks, reports, speeches, certificates, drawings, correspondence, and copies of the book and digital manuscripts for Walter Bruce MacDonald's biography of R.C. MacDonald entitled, "Catch-as-catch-can."