Materials pertaining to the establishment and activities of the commission which was created upon ratification of the Susquehanna River Basin Compact by Pennsylvania, New York, Maryland, and the United States Congress (Chapter 391, Acts of 1967). The commission developed plans relating to water resources conservation and management in the basin. Series includes minutes, correspondence, annual reports, committee proceedings, budget information, publications, project applications and agreements, proposals, flood reports, evaluations, and hydrologic and water quality data. Also contains studies, reports, and comprehensive plans on the Conowingo Dam, Pond Hill project, Chemung River Basin, and Baltimore water supply. Arranged by subject. Series not fully processed.