40 CFR 257.3-1 - Floodplains.

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There is 1 rule appearing in the Federal Register for 40 CFR Part 257. View below or at eCFR (GPOAccess)
§ 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]

Title 40 published on 2014-07-01.

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-04-17; vol. 80 # 74 - Friday, April 17, 2015
    1. 80 FR 21302 - Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities
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      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on October 14, 2015.
      40 CFR Parts 257 and 261

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United States Code

Title 40 published on 2014-07-01

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

  • 2015-04-17; vol. 80 # 74 - Friday, April 17, 2015
    1. 80 FR 21302 - Hazardous and Solid Waste Management System; Disposal of Coal Combustion Residuals From Electric Utilities
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on October 14, 2015.
      40 CFR Parts 257 and 261