Fonds is comprised of records created by or collected by Stephen Ogden documenting the Tiny Township Stop Dump Site 41 campaign. Dating 1979 through 2016, it represents a significant episode in Canadian environment activism and is comprehensive in scope. Among the materials included are: notes for speeches; transcriptions of government environmental assessments and WYE Citizens Group meetings; WYE Citizens Group press releases; maps and records of water well locations near Site 41; hydrological and geotechnical records pertaining to the watershed characteristics of the Site 41 area; MOE correspondence and statements relating to proposed dump site management, waste management and related technological considerations; Simcoe County “Corporate Services” records including meeting minutes and agendas, notifications, memorandum, notes, correspondence and emails, and media clippings; court proceedings and legal documents obtained through Freedom of Information requests made by Stephen Ogden; photographs, dossiers for exhibits; audio-visual materials including cassette tapes, VHS tapes, CDs and DVDs.

This addition to the fonds consists of articles and booklets written by Frank Morris; manuscripts and published articles by Douglas Sadler; correspondence, minutes of meetings relating to Sadler's involvment in environmental and naturalist issues and activities; correspondence relating to Teacher's College and several issues of the Young Naturalist.