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Figure 4 <br />Diversion Ditch Limits <br />500 <br />400 <br />~ 300 <br />R n e <br />v <br />'$ 200 <br />U <br />100 <br />0 <br />0.001 0.01 0.1 <br />Longitudinal Slope (ff/ft) <br />original cross-slope <br />grad <br />2:1 max slope <br />erosion control <br />lining (see notes) <br />1 ft min. freeboard <br />_2ft depth limit <br />----- <br />10 ft --- <br />original cross-slope 2.0 ff depth limit <br />grad <br />Type A - Excavated <br />-- /_ <br />~-~- 10 ft --~- <br />Note S <br />-'-~___ <br />~ 4:1 max slope -' <br />Type B - Bermed Diversion <br />1 ft min. freeboard <br />--~-~- Note 5 <br />4:1 max <br />~- 4:1 max slope ~ - - . _ <br />TYPICAL DIVERSION DITCH CROSS SECTION <br />1. Alld~asionditdxssiadfa100-yearplusl$of}ieeUomd <br />a»dall fill slopesto bereve~ed. <br />2. For di~asionditd~eswilhlsveea<tharpooran, <br />depthlimt is 2 $, ~oatyliurt is 5.0 fps, sl~arlim8 is OS <br />psi and slope limn is0.5% <br />3. Fardivasanditdxswith6'rodclimugdeplhlioitis2$ <br />vElaity limit is 55 fps, ~ knit is0.8 psfand slope limt <br />;so.~s°i° <br />4. Fadi~amdddcslimdanhh~'r~nforoe~~kdepth <br />]mit is 2 $, ~locity limit is 13 fls, slur licit is 4.5 psfaad <br />lope limit is 3% <br />5. IvSnimonwidtlrafbemiis5feet loQeasewidlhas <br />recessary to l:al~oe exrnvafi~ <br />GCC Rio Grande <br />Red Rock Plant and Mine <br />DIVERSION DITCH REQUIREMENTS <br />June 12, 2002 <br />