topsoil from the construction area to to be addressed in a written operation and excavation and then spreading the topsoil on maintenance plan are: the completed terrace will improve the growth Periodic inspections, especially of vegetation after construction. immediately following significant runoff PLANS AND SPECIFICATIONS events. Prepare plans and specifications for terraces Prompt repair or replacement of damaged that describe the requirements for applying the components. practice according to this standard. As a Maintenance of terrace ridge height, minimum the plans and specifications shall channel profile, terrace cross-sections and include: outlet elevations. A plan view of the layout of the terrace Removal of sediment that has system. accumulated in the terrace channel to Typical cross sections of the terrace(s). maintain capacity and grade. Profile(s) or planned grade of the Regular cleaning of inlets for underground terrace(s). outlets. Repair or replacement of inlets damaged by farm equipment. Removal of Details of the outlet system sediment around inlets to ensure that the inlet remains the lowest spot in the terrace If underground outlets are used, details of channel. the inlet and profile(s) of the underground outlet. vegetation is specified, seasonal Seeding requirements if needed. mowing and control of trees and brush. Site specific construction specifications Notification of hazards steep slopes on the terrace. that describe in writing the installation of the terrace system. REFERENCES OPERATION AND MAINTENANCE USDA, NRCS. 2004. . Prepare an operation and maintenance plan USDA, NRCS. National Engineering for the operator. The minimum requirements Handbook, Part 650, Engineering Field Handbook, Chapter 8.
topsoil from the construction area to excavation and then spreading the topsoil on the completed terrace will improve the growth of vegetation after construction. PLANS AND SPECIFICATIONS Prepare plans and specifications for terraces that describe the requirements for applying the practice according to this standard. As a minimum the plans and specifications shall include: A plan view of the layout of the terrace system. Typical cross sections of the terrace(s). Profile(s) or planned grade of the terrace(s). Details of the outlet system If underground outlets are used, details of the inlet and profile(s) of the underground outlet. Seeding requirements if needed. Site specific construction specifications that describe in writing the installation of the terrace system. OPERATION AND MAINTENANCE Prepare an operation and maintenance plan for the operator. The minimum requirements to be addressed in a written operation and maintenance plan are: Periodic inspections, especially immediately following significant runoff events. Prompt repair or replacement of damaged components. Maintenance of terrace ridge height, channel profile, terrace cross-sections and outlet elevations. Removal of sediment that has accumulated in the terrace channel to maintain capacity and grade. Regular cleaning of inlets for underground outlets. Repair or replacement of inlets damaged by farm equipment. Removal of sediment around inlets to ensure that the inlet remains the lowest spot in the terrace channel. vegetation is specified, seasonal mowing and control of trees and brush. Notification of hazards steep slopes on the terrace. REFERENCES USDA, NRCS. 2004. . USDA, NRCS. National Engineering Handbook, Part 650, Engineering Field Handbook, Chapter 8.
nrcs143_025637.docx