Laserfiche WebLink
Existing Grade <br />Lot 3 Existing Fill <br />(excavate) <br /> <br />'~ <br />Subdrain (if required) <br />18" min. <br />Approved non-woven filter fabric <br />1/2x3/4 in. clean drain rock <br />or approved equivalent <br />4-inch perforated rigid drain pipe <br />.-- 2°!o min. <br />12" min. Native Soil <br />~ NOTES <br />SUBDRAIN DETAIL <br />~ 1. All pipe joints shall be glued <br />~`---~- <br />Compacted Fill <br />3' min. <br />~~ Subdrain <br />Native Soil 3' min. ~--- 2°!° min. <br />0 <br />10' min. <br />COMPACTED BUTTRESS FILL <br />Compacted Fill <br />12" min. <br />overlap <br />2" <br />3' min. <br />rl 2. All perforated pipe placed pertorations down. <br />s 3. 1 % fall (minimum) on all trenches and drain lines <br />4. Class 2 Permeable material is an acceptable alternative for drain rock and geotextile. <br />Not to Scale <br />' FIGURE N0. <br />' Ko r b m a c h e r TYPICAL BUTTRESS AND SUBDRAIN <br />E ^ 9 ' ~ ° a ~_' ^ ~ ' ,-, ° - Proposed Vineyard Pass Subdivision Q <br />865 Clara Lane <br />PROJECT NO. JB-569 DATE ioios Pleasanton, California <br />