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I <br /> Table V-4.5.2(1) Maintenance Standards - Detention Ponds (continued) 1 <br /> Maintenance Conditions When Results Expected When <br /> Corn onent Defect Maintenance Is Maintenance Is Per- <br /> p Needed formed <br /> If dead, diseased, or I <br /> dying trees are iden- <br /> tified <br /> (Use a certified Arbor- I, <br /> ist to determine health <br /> of tree or removal I <br /> requirements) <br /> Slopes should be sta- <br /> Eroded damage over 2 bilized using appropriate I <br /> inches deep where erosion control measure <br /> cause of damage is (s); e.g.,rock rein- <br /> still present or where forcement, planting of 1 <br /> Side Slopes of Erosion there is potential for grass, compaction. <br /> Pond continued erosion. <br /> If erosion is occurring on <br /> Any erosion observed compacted berms a <br /> on a compacted berm licensed civil engineer I <br /> embankment. should be consulted to <br /> resolve source of erosion. <br /> Accumulated sediment 1 <br /> that exceeds 10%of Sediment cleaned out to <br /> the designed pond designed pond shape and <br /> Sediment depth unless otherwise depth; pond reseeded if <br /> Storage Area specified or affects necessary to control <br /> inletting or outletting erosion. <br /> condition of the facility. <br /> Liner(if Applic- Liner is visible and has Liner repaired or replaced. <br /> able) more than three 1/4- Liner is fully covered. <br /> inch holes in it. <br /> Any part of berm which <br /> has settled 4 inches <br /> lower than the design <br /> Ponds Berms elevation Dike is built back to the <br /> Settlements design elevation. <br /> (Dikes) If settlement is appar- g <br /> ent, measure berm to <br /> determine amount of 1 <br /> settlement <br /> I <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume V-Chapter 4-Page 831 I <br />