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[rip-rap] /ˈrɪpˌræp/
a quantity of broken stone for foundations, revetments of embankments, etc.
a foundation or wall of stones thrown together irregularly.
verb (used with object), riprapped, riprapping.
to construct with or strengthen by stones, either loose or fastened with mortar.
Origin of riprap
1570-80; gradational reduplication of rap1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for riprap
  • riprap may be required along the base of the eroded area to prevent further undercutting of the bank.
  • Procedures are also presented for riprap protection at bridge piers and abutments.
  • Several riprap sizes will be evaluated in order to develop a predictive equation for riprap stability in a culvert.
  • The riprap is angular, quarried rock, and the bedding is rounded stream gravel.
  • riprap would also be placed on the downstream side of the ramp to protect it from eddies created from future flooding.
  • riprap should be natural stone, solid precast concrete blocks, or sound pieces of concrete.
  • Grouted riprap may break up in areas of freeze and thaw.
  • The riprap would be set into place by mechanical means until the dimensions shown on the plans have been met.
  • Water velocity will determine size and volume of riprap.
  • riprap must consist of clean stone or masonry material free of all potential sources of pollution.

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