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No. 1 —Detention Ponds <br /> Maintenance Defect Conditions When Maintenance Is Results Expected When <br /> Component Needed Maintenance Is Performed <br /> Beaver Dams Dam results in change or function of Facility is returned to design function. <br /> the facility. (Coordinate trapping of beavers and <br /> removal of dams with appropriate <br /> permitting agencies) <br /> Insects When insects such as wasps and Insects destroyed or removed from site. <br /> hornets interfere with maintenance Apply insecticides in compliance with <br /> activities. adopted IPM policies <br /> Tree Growth Tree growth does not allow Trees do not hinder maintenance <br /> and Hazard maintenance access or interferes activities. Harvested trees should be <br /> Trees with maintenance activity(i.e.,slope recycled into mulch or other beneficial <br /> mowing,silt removal,vactoring,or uses(e.g., alders for firewood). <br /> equipment movements). If trees are Remove hazard Trees <br /> not interfering with access or <br /> maintenance,do not remove <br /> If dead, diseased,or dying trees are <br /> identified <br /> (Use a certified Arborist to determine <br /> health of tree or removal <br /> requirements) <br /> Side Slopes Erosion Eroded damage over 2 inches deep Slopes should be stabilized using <br /> of Pond where cause of damage is still appropriate erosion control measure(s); <br /> present or where there is potential for e.g., rock reinforcement, planting of <br /> continued erosion. grass, compaction. <br /> Any erosion observed on a If erosion is occurring on compacted <br /> compacted berm embankment. berms a licensed civil engineer should <br /> be consulted to resolve source of <br /> erosion. <br /> Storage Area Sediment Accumulated sediment that exceeds Sediment cleaned out to designed pond <br /> 10%of the designed pond depth shape and depth; pond reseeded if <br /> unless otherwise specified or affects necessary to control erosion. <br /> inletting or outletting condition of the <br /> facility. <br /> Liner(If Liner is visible and has more than Liner repaired or replaced. Liner is fully <br /> Applicable) three 1/4-inch holes in it. covered. <br /> Pond Berms Settlements Any part of berm which has settled 4 Dike is built back to the design <br /> (Dikes) inches lower than the design elevation. <br /> elevation. <br /> If settlement is apparent, measure <br /> berm to determine amount of <br /> settlement. <br /> Settling can be an indication of more <br /> severe problems with the berm or <br /> outlet works.A licensed civil engineer <br /> should be consulted to determine the <br /> source of the settlement. <br /> Piping Discernable water flow through pond Piping eliminated. Erosion potential <br /> berm. Ongoing erosion with potential resolved. <br /> for erosion to continue. <br /> (Recommend a Goethechnical <br /> engineer be called in to inspect and <br /> evaluate condition and recommend <br /> repair of condition. <br /> ['ohmic? I" Runoff Treatment BMPs—December 2014 <br /> 4-33 <br />