An isometric cutaway view of a catch basin protection device installed below a slotted frame and grate, incorporating an overflow feature to bypass peak storm volumes and an internal filter assembly for sediment control. Notes specify that catch basin protection shall comply with BMP C220 as published in the 2019 SWMMWW and WSDOT STD Plan I-40.20-00, and must be installed in drainage devices per the manufacturer's recommendations.
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