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:
OPERATION AND MAINTENANCE SURFACE DRAINAGE- FIELD DITCH CODE 607 Landowner/Operator Job Location County SWCD Farm/Tract No. Prepared By Date This Operation and Maintenance, O&M Plan cites normal, repetitive activities that apply to the conservation practice and the plan lists inspection, repair and upkeep items which are required to achieve the intended function, benefits, and life of the conservation practice. The landowner/operator is responsible for establishing and implementing this plan. Items to inspect and maintain during the 15-year design life of the practice include, but are not limited to the following. Inspect after significant storm events and at least annually to identify repair and maintenance needs. Promptly repair or replace damaged components as necessary. Remove sediment that has accumulated to maintain capacity by keeping the design channel grade and cross section. Vegetation, where specified, shall be maintained and trees and brush controlled by mechanical or chemical (pesticides) means. Pesticides will be used in accordance with label requirements and where permitted. Do not operate vehicles on side slopes. Keep equipment operators informed of all potential hazards. Excavate sloughs and in channel side slopes, smooth, and re-seed. Remove sediment and debris from side inlet structures and maintain grading so runoff does not run over channel slopes. Special Considerations: OPERATION AND MAINTENANCE SURFACE DRAINAGE- MAIN OR LATERAL CODE 608
Black Crowned Night Heron Any S – M Semipalmated Plover Any S Killdeer Any S American Golden Plover Any S Common Any D Solitary Sandpiper S S – M Pectoral Sandpiper S S,M,D White Rumped Sandpiper L S – M Baird’s Sandpiper Any S – M Least Sandpiper Any S – M Dunlin L S – M Dowitcher L S – M Long-Billed Dowitcher L S – M Stilt Sandpiper L S – M Semipalmated Sandpiper L S – M Marbled Godwit Any S – M SPECIES WITH SHALLOW TO MEDIUM WATER DEPTH PREFERENCE (<5” to 5”-10”) Bird Species Wetland Size S – Small, less than 5 ac. L – Large, greater than 5 ac. Vegetation Density S – sparse; M – moderate D – O – open water Mallard Duck Any S – M Black Duck Any S – M Pintail Any S – M Green Winged Teal Any S – M Blue Winged Teal Any S – M Shoveler Any S – M Spotted Sandpiper S S – M Greater Yellowlegs L S – M Lesser Yellowlegs L S – M Wilson’s Pharalope L S,M,D SPECIES WITH MEDIUM TO DEEP DEPTH PREFERENCES ( 5”-10” to > 10”) Bird Species Wetland Size S – Small, less than 5 ac. L – Large, greater than 5 ac. Vegetation Density S – sparse; M – moderate D – dense; O – open water
Snow Goose L S,M Gadwall S,L S,M Wood Duck S S,M Redhead L S Ring-necked Duck L S Canvasback L S Common Goldeneye L O Bufflehead S,L O Duck L S Common Merganser L S Red Breasted Merganser L S Long Billed Marsh Wren L D Short Billed Marsh Wren L D SPECIES WITH DEEP WATER DEPTH PREFERENCES (> 10”) Bird Species Wetland Size S – less than 5 ac. L – Large, greater than 5 ac. Vegetation Density S – sparse; M – moderate D – dense; O – open water Pied Bill Grebe S,L S,M Great Blue Heron S,L S,M Canada Goose S,L S,M,O American Widgeon L S Lesser Scaup L S Hooded Merganser S,L S,M Purple Gallinule S,L S,M Common Gallinule S,L S,M American Coot L S,M Common Tern L S Belted Kingfisher S,L S,M TIMING AND EXTENT OF WATER LEVEL MANIPULATIONS Wetlands that have been constructed with level control structures (commonly known as stoplog structures) can be managed in order to maximize their benefits to water bird species. Following are some recommendations for manipulating water levels. By managing water levels, unwanted plant growth can be controlled, desirable plant growth can be encouraged, and certain mixes of open to vegetated water can be established and maintained. Post Spring Migration Period – May & June