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<br />.. ,(- \.. If. <br /> <br />Sediment Cto ntrtol <br />InlerProtec Ion <br /> <br /> <br />MINIMUM 2S-MM (Hi',) <br />DIAMETER ROCK BARRIER <br />PlACED APOUND AND TO TilE <br />TOP OF CONCRETE BLOCKS <br /> <br /> <br /> <br />/ <br /> <br />PlACE ROCK BARRIER BAGS <br />THAT NO GAPS ARE EVIDENT <br /> <br />CONCRETE BLOCKS <br />PUltfO AROUND lHE <br />AREA DRAIN <br /> <br />A <br /> <br /> <br />WIRt SCREEN PU.CED <br />AROUND CONCRETE <br />8LOC~S <br /> <br />\ <br />\\ <br />AREA DRAIN Willi A <br />GRATE <br /> <br />/ <br />25-MM (Hit) ROCK CONTAINED In PERViOU~ <br />BURLAP BAGS OR IN SYNTHEnC NO BAGS (} <br />MESH) APPROXIMATELY 6QO-MM (24-IN,j LON <br />300-MM (12-IN) WIDE AND 150-MM (6-INi <br /> <br />PLAN VIEW <br /> <br />PLAN VIEW <br /> <br />CONCRETE BLOCkS <br />STACKED 1 OR 2 <br />LAYERS HIGH <br />\ <br /> <br />WIRE SCREEN TO <br />PREVENTTHC <br />MOVEMENl OF ROCK <br /> <br />IF ~ OOUBLE lllYER Of <br />BARRIER 8A.GS. ~.RE USI <br />TOP BAGS MUST BE Pc <br />THAT NO GAPS ARE EVI <br />THE LOWER lAYER or I <br /> <br />RUNOfF <br /> <br /> <br />ROCK BARRIER BAGS CAN BE <br />A SINGLE OR DOUBLE lAyER <br />'" <br /> <br />.~lmIIIINJlf <br /> <br />SEEPAGE <br /> <br />SECTION A-A <br /> <br />SIDE ViEW <br /> <br />COI~CRE1E BLOCh BARRIER <br /> <br />ROCI< BAG BARRIEf <br /> <br />NOTE ROCI; BARRIERS CAN BE USED ON PAVEMENT OR BARE GROUND <br /> <br />Type A, B or C <br />Source: MnDOT, 2000 <br /> <br />3-118 <br /> <br />Minnesota Urban Small Sites BMP Manual <br /> <br />l _ <br />