32 Pa. Stat. § 673
The Department of Forests and Waters is hereby authorized and directed to make an investigation and reforestation survey, with flood control as the objective, of all private forest lands and all abandoned farm lands and submarginal lands, their location, availability for purchase, and their approximate purchase prices, together with all lands in any of the above classes on which the taxes imposed by political subdivisions are delinquent, or which have been sold to counties because of insufficient bids at tax sales.
The investigation and survey shall include the three watersheds of the Commonwealth, the Susquehanna watershed, the Delaware watershed, and the Ohio watershed, including lands draining, directly or indirectly, into the Susquehanna River and its North and West Branches and the Juniata River, the Delaware, the Lehigh and Schuylkill Rivers, and the Ohio, Allegheny, Monongahela, and Beaver Rivers.
32 P.S. § 673