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2.1.3 - Element 3: Control Flow Rates <br /> Will you construct stormwater retention and/or detention facilities? <br /> ❑ Yes ® No <br /> Will you use permanent infiltration ponds or other low impact development (example: rain <br /> gardens, bio-retention, porous pavement)to control flow during construction? <br /> ❑ Yes ® No <br /> List and describe BMPs: Wattles (C235) <br /> During construction, stormwater runoff will sheet flow to wattles prior to dissipating into grass- <br /> covered surfaces before reaching the Snohomish River. Construction of wattles reduces the <br /> velocity of the concentrated flow and dissipates energy as the flow moves down gradient. <br /> Installation Schedules: Install prior to contruction activities. <br /> Inspection and Maintenance plan: Wattles and silt fence shall be monitored for performance <br /> during and after every runoff-producing rain event. <br /> Responsible Staff: TBD <br /> Page 19 <br />