Rip Rap

Riprap, as rip raprip-rapshot rockrock armour or rubble, is large, heavy rock that is strategically place along shorelines, streambeds, bridge abutments, pilings and similar structures to prevent natural weatherization or shoreline erosion. It is made from a variety of rock types, most commonly granite or limestone, and occasionally concrete rubble from building and paving demolition.

Rip Rap Uses

​Rock riprap is used where erosion potential is often high. It is also used to slow the velocity of concentrated runoff which in turn increases the potential for infiltration. Riprap is available in various sizes and has two primary purposes:

  • Erosion Control – It can be used to fortify any waterway or water containment where there is potential for water erosion.​ This includes lakes, rivers, oceans and ponds that experience a natural flux of water, which will cause the shoreline to erode over time.
  • Railroad Ballasts – Depending on the size, rip rap rock might also be used to divert water away from and provide enhanced stability for railroads.
  • Driveways –  Similar to other types of construction aggregate, this material can be used to construct roads in rural areas.

Rip Rap Benefits

  • It’s an easy-to-use method for decreasing water velocity and protecting slopes from erosion. It is simple to install and maintain.
  • It provides some water quality benefits by increasing roughness and decreasing the velocity of the flow, inducing settling.

Size Availability

  • 4×8
  • 8×12
  • 12×18
  • 18×24

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