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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br /> <br />~. <br />1' ~" F/LTfR ROCK i;iPr70NAC) • <br />L <br />CHECK DAM POCK ~ 1 ~ / MAX/MUM DAM h£ICHi = <' <br />7 - I ~ <br />;• ~ <br />/~ / <br />D z~°~,, <br />SILL ~ I DIRECTION <br />APRON , ' , <br />.^' ~ <br />C~ ~ TOED-lN WOVEN FILTER FABRIC iGPTIONAL; <br />1-~._. ~. _. _...J <br />L.___ 1'S ` D/7 - PROFILE <br />J <br />CROSS sECnoN <br />~DED-lN WOVEN FILTER <br />FABRIC (OPTIONAL) <br />APPROXIMATE ROCK GRADATIONS <br />FDR CH£CK DAMS <br />C/+fCK DAM ROCK <br />Omai = 12" <br />Oro = 6" <br />Dmrn = ,"' <br />F4 TEP ROCX <br />7. PASSING <br />r• 100 <br />J/<" 30-100 <br />J/8" 70-55 <br />,~a 0- /5 <br />NOTE: SCORIA !S ACCEPTABLE CHECK DAM OP FIL TfR ROCK. <br />Figure B-4 <br />Typical Rcek Check Dam <br />(OSMItE, et. al.) <br />~ W <br />