Rock Rip Rap

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Rock Rip Rap POLLUTANTS ADDRESSED: Nutrients and Organics, Salinity, Sediments

DESCRIPTION: Riprap consists of a layer of angular stone designed to protect and stabilize areas subject to erosion, slopes subject to seepage, or areas with poor soil structure. Riprap is used on streambanks where stream velocities are too great to successfully establish vegetative cover, on channel bottoms and slopes, stormwater structure inlets and outlets, slope drains, and shorelines.

ADDITIONAL BENEFITS: Riprap protects infrastructure from erosion and loss. ALTERNATIVE MANAGEMENT MEASURES: Brush Mattress Grazing Management Road Stabilization Rock Riprap Toe Rock Vertical Bundles

LOAD REDUCTION MECHANISM: Nutrients/Organics Management - By stabilizing banks, riprap reduces erosion and the transport of soil organics into adjacent stream waters. Salinity Reduction – Transport of soil salts into adjacent waters is also reduced. Sediment Reduction – Reduced bank erosion reduces the introduction of sediments into adjacent waters.

PERMITTING REQUIREMENTS: Permits are required under Sections 404 and 401 of the Clean Water Act if installed adjacent to a stream or wetland.

LAND USE CLASSIFICATION: Agricultural land Grazing land Urban areas Rural areas

Arid Southwest BMP

POTENTIAL TREATMENT AREAS: Agricultural lands Developed lands Streamside

Contact county regional control district.

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