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become considerably cleaner and more permeable. lYe <br />i would also examine for evidence of local instabilities <br />and for the formation of a natural drainage blanket <br />at the base of each lift. Should our assessment in- <br />dicate some problems, we might recommend placement of <br />r a limited drainage blanket south of boring G-104, <br />I flatter design slopes, a permanent berm, and/or addi- <br />tional site inspection. llelaying placement of a <br />~;. <br />'~ drainage blanket until one or two lifts are placed <br />should not seriously alter its effectiveness. <br />~- 6. Regardless of the fin al. design slope, we recommend <br />provisions for surface drainage. Surface runoff <br />should be intercepted and channelled toward Goode <br />Spring Creek and should not be allowed to run <br />uncontrolled over the fill. If feasible, runoff <br />should be channelled away from the fill entirely. <br />~i Also, the final slope surface should be made <br />i <br />impervious by placement and compaction of relatively <br />~.. silty soils. <br />7. In our opinion, due to the well-graded and coarse <br />I_. composition of the waste dump fill and the overall <br />L geometry of the site, a major slide reaching State <br />Highway 13 is extremely unlikely even with a major <br />buildup of water pressure. <br />L <br />S. During and after placement of the waste dump, the <br />I fill surface should be periodically inspected for <br />L evidence of subsidence. Open cracks which develop <br />in the surface should be filled and sealed to pre- <br />- vent any buildup of water pressure in the opening. <br />~• <br />L <br />~' <br />