53 Pa. Stat. § 2801
From and after the passage of this act, whenever the burgess and town council of any borough or the councils of any city within this commonwealth shall deem it essential to the preservation of health, or to the interest and welfare of any borough or city and the inhabitants thereof, to vacate, change, alter or relocate the course or channel of any creek, run or natural waterway, other than navigable streams, the said burgess and town council, or the councils of any city, shall have full power and authority, by ordinance duly passed, to vacate, change, alter or relocate the course or channel of any creek, run or natural waterway, other than navigable streams, or any part thereof, within the limits of such borough or city, and for this purpose to enter upon, condemn and take such property and materials as may be necessary to effect such change, alteration or relocation.
53 P.S. § 2801