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PREPARE BENCH AT HEAD OF <br />`DIVERSION STRUCTURE <br />1.0 _T2~ / <br />2 5 ! 1 ~ ~ RECLAIMED SURFACE <br />\ ~ <br />~ N <br />_____=.1 ~.-~ ~ <br />STEP 1 ~\ <br />ESTABLISH BENCH FOR RIP RAP 4' _ <br />WIDE AT TOP, TAPERED TO 1' AT TOE ~ <br />OF BENCH ~ - <br />1.0 <br />2.5 'f_. ~,. <br />~ i~~~;~_ <br />~~~~~_, <br />STEP 2 <br />PLACE APPROXIMATELY 1.7 TONS (30 <br />cu h) TYPE M RIP RAP ON <br />CONSTRUCTED BENCH TO DISSIPATE <br />FLOW ENERGY <br />NOTES: <br />1. TYPE M ANGULAR RIP RAP (dso = 12 inches) <br />SMALLER THAN SIZE INTERMEDIATE INTERMEDIATE I <br />BY WEIGHT DIMENSION (in.) WEIGHT (Ib.) ~I <br /> <br />70-100 _ <br />21 _ -_- __ _ _-___j <br />550 <br />50-70 18 275 <br />35-50 12 100 <br />2-10 4 25 <br />REF. ISBASH CURVE, APPENDIX 6A, PARi 650, ENGINEERING FIELD HANDBOOK <br />2. TYPE M ANGULAR RIP RAP (dla6 = 21 inches) ADEQUATE FOR WATER VELOCITIES UP TO <br />APPROXIMATELY 12 FEET PER SEC. REF. ISBASH CURVE <br />3. RIP RAP BEDDING TO BE PREPARED IN EXISTING GRANULAR SOIL AND FILL MATERIALS <br />4. RIP RAP SHOULD BE SELECTED FROM BEST AVAILABLE DURABLE ROCK; SG MIN. 2.55 <br />5. 1.7 TONS BASED ON 30 cu H at 110 Ib./cu. K. (assumes approximately one-third void space) <br />I cer}ify `~~~oe:iej~~~j`,is~~drawing and <br />chat is w ~ ~'ld~uh6~i~;,v~~ ision. The <br />inform~~,rro ~YSPained here~~sacvru,rate to the <br />1~YmvLReruleairf~ a0d belief. <br />ie-~-oq <br />Date <br /> <br /> CHIMNEY ROCK MINE <br /> FIGURE 7 <br />TYPICAL RIP RAP INSTALLATION FOR <br />ENERGY DISSIPATION APRON AT HEAD <br />m, <br />"~°' OF MINOR DIVERSION STRUCTURES <br />~_ <br /> <br /> - <br />moo,. .W.~~~o~.,oa.~~~.~~. <br /> <br /> KAISER STEEL RESOURCES <br />M,o~,. U.~~oa,a <br />/ i w <br />~PP`° TR'~3¢fV , <br />