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. Design the discharge from the sediment trap by using the guidance for discharge from tem- <br /> porary sediment ponds in BMP C241: Sediment Pond(Temporary). <br /> Maintenance Standards <br /> . Sediment shall be removed from the trap when it reaches 1-foot in depth. <br /> . Any damage to the trap embankments or slopes shall be repaired. <br /> 2019 Stormwater Management Manual for Western Washington <br /> Volume ll-Chapter 3-Page 385 <br />