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i <br /> ":y /'a� F�p Nam:er. <br /> �`,' �i�l � � FIELD R�:ORT 1290-08-06 <br /> � � � ' Geo��En�inee , <br /> �q a �.� 5 Aa;�R o.u: <br /> 2405- 140th Aveaue NE g Hansbrook qugust 18, 199 <br /> r] � �CUCILG�Wf�9�5 � p..ner. Feporl NumOer: <br /> � � ��) �'�-5� ' Northstar Dev. 65 <br /> ReOueO BY• Leotion: NriwC PeCe: <br /> y�"� 1 Brad Biggerstaff Everett 9:15 i of 2 <br /> N n ` �Pese o1 Vsh: W��N�r. OepaRure: PermR NumOer. <br /> p�'p�' �j � C/H Fill control Cloudy/rain 60 12:05 <br /> �p�R1 � <br /> � � I <br /> «� <br /> O H The site was visited at che request of Y.ike/Gary Gunning to continue <br /> '�� monitoring of fill placed north of A-line from station 19 + 00 to 22 + 50. A <br /> p• nuclear density soil moisture gauge and otservation of heavy equipmenc (loaded . <br /> ��y scrapers) vere used. <br /> H <br /> F+ � Fill macerial in this area consisted of� 2 materials: a bro4-n fine to med. � <br /> ��„� sand mi[h gtavei and trace amounts of s11t and a brovn silty fine sand viih <br /> �� minor gravel. Bach materials were eseimaeed to be at the optim+�.a moisture . <br /> coneenc. A minor amount of a reddish-brow-n fine sandy silt �as placed as till; <br /> � �� eontractor (Sumas) vas advised that this material aas 6e1o4 opc. moisture snd <br /> should be mixed wieh t!�e sandier material or have water added. This material <br /> '� ' ' appears to be the axidized soil just below the topsoil horizon as it also <br /> � contains root and orgsnic material (less than 3 percent), <br /> Based on the results of our nuclear density tests snd general observacions, <br /> it is our opinion that the current method of placement (3 to 6 inch scrape[ <br /> � lifts compacted wich the double sheep's foot roller followed by loaded scraper <br /> - compaction at one foot intervals) is providing adequate or compaction of 928 !{DD <br /> (ASTH D-1557) greater ehan 2 feet bellow su6grade and 95� MDD (ASTM D•1557) <br /> ���' '�� '� above Z feet belov subgrade. <br /> I ��1 The current slope (3:1) in this area is temporary and may ba steepened to a <br /> � Z:1. Gary Cunning �:as advised that this vould have to be done from che bottom � <br /> 1 � of the slope and keyed into the existing slope in order to achie��e compaction <br /> i �'�� requirements. He is avare oi [his. It vas recommended that the eaisting slope <br /> � to eLe south be keyed into during the current fill activities. Ne indicated <br /> � that this is being done and vill advise Sumas that it is time to cut another <br /> I key. <br /> ��� <br /> i <br /> I ��� Activity south of A-line (16 + 00 to 17 + 20) today vas zestzicted to dozer <br /> cuts of [he existing fill to fine Cune the gcade. Folloving this, sandy soil <br /> ' ' vill be stockpiled in this area ior use later on the project. Contr>ctor vas <br /> . �r� ' advised that any distur6ed areas or soil stockpiles should be rolled to provide <br /> �,� a cap for waeer sunoff and prevent the soils from becoming saCurated during <br /> ' possible rains. <br /> t <br /> � <br /> ��� <br /> ��� Mike and 6ary Cunning asked me to observe a cut area on the vest side of <br /> the plateau ad�acent to the slope above the park vhere setback concerns exist. <br /> i ! I observed that an approximace 3 foot concrete eap had been cut back about 6 to <br /> � ' � �I 7his rtporl0refeMs opiMans IormeC es��esM ei ov eCservelions el�qlMlee relellnp to peatecNiul enpinte�in0, Wt�dr on Ne mnP�[tor to Comply wn.�L��O�anf II <br /> � �nC spe[.Mutlonf Nroup�oul IDe Ompien ol l�e projeq b�esCe[9ve el Ue p�esmce ol ow�eprcserrtative, Our wo�k tloef nol IntloEe wpsrvitlon tt 6nction oi l�e <br /> •tlu�l work al Ne[o�M1ndor,hia empl0reea o��p�mf. Our Nm witl not Ee rcapons101e lo�JaC Ot atle Selety on Wf qojeR <br /> Attachments: � I <br /> Dlstribution: Signed• /�/i�' , �i / <br /> / , ��L•' �''� 'I <br /> G <br /> �__ I <br />