1. Short title This Act may be cited as the Defense of Environment and Property Act of 2018 . 2. Navigable waters (a) In general Section 502 of the Federal Water Pollution Control Act ( 33 U.S.C. 1362 ) is amended by striking paragraph (7) and inserting the following: (7) Navigable waters (A) In general The term navigable waters means the waters of the United States, including the territorial seas, that are— (i) navigable-in-fact; or (ii) permanent, standing, or continuously flowing bodies of water that form geographical features commonly known as streams, oceans, rivers, and lakes that are connected to waters that are navigable-in-fact. (B) Exclusions The term navigable waters does not include (including by regulation)— (i) waters that— (I) do not physically abut waters described in subparagraph (A); and (II) lack a continuous surface water connection to navigable waters; (ii) man-made or natural structures or channels— (I) through which water flows intermittently or ephemerally; or (II) that periodically provide drainage for rainfall; or (iii) wetlands without a continuous surface connection to bodies of water that are waters of the United States. (C) EPA and Corps activities An activity carried out by the Administrator or the Corps of Engineers shall not, without explicit State authorization, impinge upon the traditional and primary power of States over land and water use. (D) Aggregation