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—A <br /> Drain grate <br /> °®°moo oQ ,o PO .04 <br /> gg o <br /> -*'° `��-qq a°`.4 o°° ---° '� o4 °°°c�'g° Concrete block <br /> ° Ca.1a dlJo �o 8O fl co ° `� �0 <br /> 410V--:(Th'-'0, I a t0 °OC.7 clVc ° <br /> a <br /> tri-- a° 0 - 4 QO <br /> w� ° '° ° Gravel backfill <br /> O <br /> °Q-gJ oQ°0a°°Q op°o a <br /> aO� o oc C7,; ' <br /> 1i <br /> Qom°J°q `°°Q.3aO I O©O� 30 0 <br /> oe <br /> ° .41,63 '0'c'N 04°o ; q aO , <br /> op0.4 °;4°66'6°,(D O4o <br /> Atilt <br /> 0 coo <br /> <,) ‘z--'°6 <br /> --II.-A <br /> Plan View <br /> Concrete block <br /> Wire screen or <br /> filter fabric <br /> Gravel backfill _�_Overflow <br /> water Ponding height <br /> :.40,;',.-o�� �\\\\\� ^� \\\\\• o oQ <br /> .oDO.:_c+fir( © Water EN Ijl� .%4 :�°00+, <br /> •► o o . ® �\\\\\� %1%■%■%■%■%■''//i ; o s oma' o•.P,1•.. / <br /> \/\f\/\/\\/ Drop inlet \/\/\• /\/\ <br /> / /i//jY/j//i /j�/j��//i//i <br /> \i<W ///\//‘ <br /> Section A-A <br /> Notes: <br /> 1. Drop inlet sediment barriers are to be used for small, nearly level drainage areas. (less <br /> than 5%) <br /> 2. Excavate a basin of sufficient size adjacent to the drop inlet. <br /> 3. The top of the structure (ponding height) must be well below the ground elevation <br /> downslope to prevent runoff from bypassing the inlet. A temporary dike may be <br /> necessary on the downslope side of the structure. <br /> NOT TO SCALE <br /> Figure II-4.2.8 <br /> Block and Gravel Filter <br /> PARTMENT OF Revised August 2015 <br /> ECOLOGYPlease see http://www.ecy.wa.gov/copyright.html for copyright notice including permissions, <br /> State of Washington limitation of liability, and disclaimer. <br />