Pursuant to the provisions of Title 10, United States Code, Section 2683, and notice thereunder from the Department of the Army to the Governor of Illinois by letter, dated 13 August 1975, that the United States relinquishes and retrocedes to the State of Illinois exclusive legislative jurisdiction over Tracts GC-10 and GC-11, formerly a part of the Granite City Engineer Depot, Granite City, Illinois, subsequently transferred, 28 April 1958, to the Chain of Rocks Canal, a civil works project of the United States, containing 116.6 acres, the State of Illinois hereby accepts retrocession of jurisdiction over all land described by metes and bounds and shown on the map included as a part of such letter of 13 August 1975.
5 ILCS 570/1