40 CFR 257.3-1 - Floodplains.

§ 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 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]

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

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United States Code

Title 40 published on 10-May-2017 04:28

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR Part 257 after this date.

  • 2016-11-28; vol. 81 # 228 - Monday, November 28, 2016
    1. 81 FR 85732 - Hazardous Waste Generator Improvements Rule
      GPO FDSys XML | Text
      Final rule.
      This final rule is effective on May 30, 2017. The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of May 30, 2017.
      40 CFR Parts 257, 258, 260, 261, 262, 263, 264, 265, 266, 267, 268, 270, 271, 273, and 279
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