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-z- <br /> <br />• <br />(4) A nominal depth earthfilled 3:ey trench should be c7nstructed at <br />Pond 1. At Ponds 21+. throu3h 5, cutoff trenches e::tsndirr3 into <br />co,-~petent oedreck should be provided to minimize undersaerago <br />potential. 'be drains should be provided within all er.~hanlerent <br />structures except Pond 3, which has a :aaxl;w<, Lapounc;nent decth <br />of only 9 feet. <br />(5) Sloe protection gill be recuired en the upstream faces and <br />spillway channels of the proposed en;an'-m.ents *_o prevent surface <br />erosion. - <br />(6) Foundation soils within Pond 1 are :>oft to -:eaium stiff and :gill <br />(~) <br />undergo consolidation. ifiis embanlciert should b' carefully <br />monitored during and after mn~truction t•~~ frequent visual <br />surveillance and by instrumentation, includi~ surface monuments <br />and well piezor,,2ters. Instru.^.rentation should also txx provided <br />within the remaini~r.~ emban}~ents but should not be as~critical. <br />3Yie maximum proposed er:~bankment sections and feurdations haae <br />adequate. strength to withstarx3 expected seis.^~ic and static <br />loadings with satisfactory safety factors. :his assumes shear <br />strength properties of Pond F]nbankments 2A, 3, ~ and S to be <br />equal to those for Fond 1. <br /> <br />,~ <br /> <br /> <br /> <br /> <br />1 <br />i <br />.~ <br /> <br />"3 <br />