2215 MERRILL CREEK PKY BASE FILE 2018-01-01 MF Import

a _: �.,� �T..:.r � � � i �� w� � � l ��e � , : � � �� ��R i ;. �d Gco�F.nginccrs �j�g �'� contents of the weaChered till indicaCe that the upper soils on the site I b �y � f H will need to be moistvre—conditioned by drying or aerating prior to H kkr� compaction unless earthwork is not done until mid— to late summer. �y H 6� N � ' PERMANENT SLOPES AND ROCKffitIES : ' Ay�w I t We recommend a maximum permanent slope inclination of 2H:1V in the � �� '' native soils or in structural fill placed in accordance with our recommen— I - ,�, dations. The structural fill should be compacted to at least 90 percent .. . , � � of CIDD. Fill shoul3 be carefully compacted to and on the slope face, or V � ` :9 the fill embankment should be overbuilt and cut back. A maximum permanent � �.� slope of 1.SH:1V for cuts in the unweathered dense glacial till may he , used. However, it may Ue difficult to establish permanent vegetation to i prevent erosion. Some sloughing and raveling should 6e expected at this ; I steeper inclination. Pcrmanent slopes should be hydroseeded or otherwise i � prorected from erosion. Temporary erosion control measures may be : � necesoary until permanent vegetation is established. � .'�� " Rockeries may be used to face cuts in the dense native soils. - � ly i Although rockeries oFfer some lateral restraint, they are not normally � � ta intended to provide structural lateral supporc. Rockeries should be ?.i �� built in accordance with the standard of practice; the actual desigti and ' , construction should Ue the responsibility of the rockery contractor. �.1 We understand tliat grades will be raised significan[ly along the �`� north and possibly the east margin of the property. Rockeries in these � I � areas will face a fill emUankment. Wliere rockeries face more than a 6—foot height of structural fill, we recommend inclusion of a durable ' i �� a � � , polymer grid mat'erial such as Tensar Geogrids widtin the fill ].ayers of , r.e � the structural fill. Tlie reinforced embankment construction should be ', � ; � performed and the hei�ht of die rockery limited in accordance wich the � ' I� M grid material manufac[urer's recomme�idations . The rockery can Ue � � constructed as cl�e embankment is placed, or aFCerwards. �� I S[iAi.LOG POIINDATION SUPYORT � . IsolaCed or conCinuous spread fooCings may Ue founded on structural �''� fill, medium dense weathered till or Che unweatltered glacial till. We � i recommend that isolated colwnn and continuous wall fooCings have minimum i � 8 � o� - . ._. _ . .---. _ . ._,.,,... . .... . ..__._.. . . . ... _,_..,...,. ..- ;.,.,. . . . . . � .. . . .. ,r"-r•�--�----- -- - ae .