N.J. Stat. § 30:9-12.1
The board of chosen freeholders of any county having a population in excess of 400,000 may establish, erect and maintain a county hospital or hospitals for sick, disabled, or aged persons, for the mentally ill, and for persons suffering from communicable diseases, and for that purpose shall have power to:
Purchase and lease real property therefor or acquire such real property by condemnation pursuant to the provisions of chapter 1 of Title 20 of the Revised Statutes (Eminent Domain s. 20:1-1 et seq.);
Erect all necessary buildings and make all necessary improvements, plans and alterations, the plans first to be approved by the State Department of Health;
Appropriate money for the purchase of a site and for the construction or reconstruction of all necessary buildings, including the original furnishings and equipment therefor, and borrow funds therefor on the credit of the county and issue county obligations therefor in like manner as for other county purposes;
Accept and hold in trust for the county any grant or devise of land or any gift or bequest of money or other personal property or any donation and apply the same in accordance with the terms of the gift.
N.J.S. § 30:9-12.1