are in the drainage area above the structure for water control. Other Considerations: OPERATION AND MAINTENANCE SUBSURFACE CODE 606 Landowner/Operator Location Township County SWCD Farm/Tract No. Prepared By Date Inspections and maintenance are required to obtain intended function for subsurface drains. Items to inspect and maintain during the 20-year design life of the drains are: Settling of fill in the subsurface drain installation trench may occur. Addition of compacted fill material may be needed. Maintain a minimum 24 inches of soil cover over subsurface drains. Remove woody vegetation such as willows, cotton wood, elm, and soft maple trees from the vicinity of subsurface drains. Broken subsurface drains are evident from wet areas, holes, or seeps that develop. Repair all broken subsurface drains immediately. Inspect and maintain subsurface drain outlets, including animal guards. Install a rock riprap splash pad consisting of ODOT Class C rock riprap if erosion occurs at the subsurface drain outlet. surface inlets, junction boxes, and other appurtenances. Repair as needed to maintain their intended function. Remove woody vegetation within 5 feet of a subsurface drain outlet. The outlet must be fire resistant if burning is used to remove vegetation. Herbicide applications to remove vegetation must be applied according to manufacturer’s recommendations. If iron ochre and manganese dioxide precipitates plug the lines, a cleanout structure must be installed to provide access for cleaning equipment. It is recommended to install tile blocks, stoppable catch basins, or other temporary flow blocking devices if subsurface drain water can become polluted from land application of manure. Special considerations:
are in the drainage area above the structure for water control. Other Considerations: OPERATION AND MAINTENANCE SUBSURFACE CODE 606 Landowner/Operator Location Township County SWCD Farm/Tract No. Prepared By Date Inspections and maintenance are required to obtain intended function for subsurface drains. Items to inspect and maintain during the 20-year design life of the drains are: Settling of fill in the subsurface drain installation trench may occur. Addition of compacted fill material may be needed. Maintain a minimum 24 inches of soil cover over subsurface drains. Remove woody vegetation such as willows, cotton wood, elm, and soft maple trees from the vicinity of subsurface drains. Broken subsurface drains are evident from wet areas, holes, or seeps that develop. Repair all broken subsurface drains immediately. Inspect and maintain subsurface drain outlets, including animal guards. Install a rock riprap splash pad consisting of ODOT Class C rock riprap if erosion occurs at the subsurface drain outlet. surface inlets, junction boxes, and other appurtenances. Repair as needed to maintain their intended function. Remove woody vegetation within 5 feet of a subsurface drain outlet. The outlet must be fire resistant if burning is used to remove vegetation. Herbicide applications to remove vegetation must be applied according to manufacturer’s recommendations. If iron ochre and manganese dioxide precipitates plug the lines, a cleanout structure must be installed to provide access for cleaning equipment. It is recommended to install tile blocks, stoppable catch basins, or other temporary flow blocking devices if subsurface drain water can become polluted from land application of manure. Special considerations:
OM_OHIO_7-7-2015.docx