[Code of Federal Regulations] [Title 40, Volume 22] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR257.3-1] [Page 370-371] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 257--CRITERIA FOR CLASSIFICATION OF SOLID WASTE DISPOSAL FACILITIES AND PRACTICES--Table of Contents Subpart A--Classification of Solid Waste Disposal Facilities and Practices Sec. 257.3-1 Floodplains. (a) Facilities or practices in floodplains shall not restrict the flow of the base flood, reduce the temporary water storage capacity of the floodplain, or result in washout of solid [[Page 371]] waste, so as to pose a hazard to human life, wildlife, or land or water resources. (b) As used in this section: (1) Based flood means a flood that has a 1 percent or greater chance of recurring in any year or a flood of a magnitude equalled or exceeded once in 100 years on the average over a significantly long period. (2) Floodplain means the lowland and relatively flat areas adjoining inland and coastal waters, including flood-prone areas of offshore islands, which are inundated by the base flood. (3) Washout means the carrying away of solid waste by waters of the base flood. [44 FR 53460, Sept. 13, 1979; 44 FR 54708, Sept. 21, 1979]