AND (Ft.) 580 candidate species and their habitats, whenever possible. Treatment(s) used to stabilize and protect of streams or constructed channels, and shorelines Treatments applied shall seek to avoid adverse of lakes, reservoirs, or estuaries. effects to archaeological, historic, structural, and traditional cultural properties, whenever possible. To prevent the loss of land or damage to An assessment of unstable streambank or land uses, or facilities adjacent to the banks shoreline sites shall be conducted in sufficient of streams or constructed channels, detail to identify the causes contributing to the shoreline of lakes, reservoirs, or estuaries instability (e.g. livestock access, watershed including the protection of known historical, alterations resulting in significant modifications archeological, and traditional cultural of discharge or sediment production, in channel properties. modifications such as gravel mining, head To maintain the flow capacity of streams cutting, water level fluctuations, boat-generated or channels. waves, etc.). Reduce the offsite or downstream Proposed protective treatments to be applied effects of sediment resulting from bank erosion. shall be compatible with improvements being planned or installed by others. To improve or enhance the stream corridor for fish and wildlife habitat, aesthetics, Protective treatments be compatible with the recreation. bank or shoreline materials, water chemistry, channel or lake hydraulics, and slope characteristics above and below the water line. This practice applies to streambanks of natural End sections of treatment areas shall be or constructed channels and shorelines of lakes, adequately anchored to existing treatments, reservoirs, or estuaries where they are terminate in stable areas, or be otherwise susceptible to erosion. It does not apply to stabilized to prevent flanking of the treatment. erosion problems on main ocean fronts, Protective treatments shall be installed that beaches or similar areas of complexity. result in stable slopes. Design limitations of the bank or shoreline materials and type of measure installed shall determine steepest permissible General Criteria Applicable to All Purposes slopes. Treatments shall be in accordance with all Designs will provide for protection of installed applicable local, state and federal laws and treatments from overbank flows resulting from regulations. upslope runoff and flood return flows. Treatments applied shall seek to avoid adverse Internal drainage for bank seepage shall be effects to endangered, threatened, and provided when needed. Geotextiles or properly
(Ft.) 580 Treatment(s) used to stabilize and protect of streams or constructed channels, and shorelines of lakes, reservoirs, or estuaries. To prevent the loss of land or damage to land uses, or facilities adjacent to the banks of streams or constructed channels, shoreline of lakes, reservoirs, or estuaries including the protection of known historical, archeological, and traditional cultural properties. To maintain the flow capacity of streams or channels. Reduce the offsite or downstream effects of sediment resulting from bank erosion. To improve or enhance the stream corridor for fish and wildlife habitat, aesthetics, recreation. This practice applies to streambanks of natural or constructed channels and shorelines of lakes, reservoirs, or estuaries where they are susceptible to erosion. It does not apply to erosion problems on main ocean fronts, beaches or similar areas of complexity. General Criteria Applicable to All Purposes Treatments shall be in accordance with all applicable local, state and federal laws and regulations. Treatments applied shall seek to avoid adverse effects to endangered, threatened, and candidate species and their habitats, whenever possible. Treatments applied shall seek to avoid adverse effects to archaeological, historic, structural, and traditional cultural properties, whenever possible. An assessment of unstable streambank or shoreline sites shall be conducted in sufficient detail to identify the causes contributing to the instability (e.g. livestock access, watershed alterations resulting in significant modifications of discharge or sediment production, in channel modifications such as gravel mining, head cutting, water level fluctuations, boat-generated waves, etc.). Proposed protective treatments to be applied shall be compatible with improvements being planned or installed by others. Protective treatments be compatible with the bank or shoreline materials, water chemistry, channel or lake hydraulics, and slope characteristics above and below the water line. End sections of treatment areas shall be adequately anchored to existing treatments, terminate in stable areas, or be otherwise stabilized to prevent flanking of the treatment. Protective treatments shall be installed that result in stable slopes. Design limitations of the bank or shoreline materials and type of measure installed shall determine steepest permissible slopes. Designs will provide for protection of installed treatments from overbank flows resulting from upslope runoff and flood return flows. Internal drainage for bank seepage shall be provided when needed. Geotextiles or properly AND
nrcs143_025690.docx