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<br />lrlruouuc•rlo,a nlro slmuu.c.
<br />Koclc strucCnre e;calainati.uus ••ere Blade to locata, wuasure any lu;, Che
<br />rnnjur planer sCrl~cCures such as f.rnctures, joints or other planur ciisoont-
<br />in,~iCies, plus and •~~eak ur ili;;hly Era.:C~IreJ toclc Cypes that •'uu1J i.lJivid-
<br />IIn1.1y or cnllecti.vely creaCa pnCeutial Failures in Che prnpusu,l slope 'cells.
<br />ll,e ~;:puscJ rock faces of I:Ite ~uarr, a~l~l tli.e near-1,)~ foal coil's ••ere vi•oi~ally
<br />eral,iueJ Eor conCiauu^s :acucturea ur ubvi.ou^, •,eak zones. 'f'ile observaC;orr;
<br />disclose~.l sevaral E. acCnru sysCe~,ls (~~r joints); als~~, a laajui' 1an]C ^c:iLi.r•
<br />.)1..:or:C easC-^~..^,t dcrCicall; Liltl'PiCC15 I Ile l,ropcrC; i.l t le 1-I )c„h~,s~.l ~~cst all.
<br />Dili^rtdC U' U"-atl" l', ••a\'; p .les ^~CC I. 1 ~S i,u Y. un appar_
<br />e.tt ^ea:c ruck:: ..r zo~tes ••ere ubserve,l.
<br />fhe deposit contains north-south structures that ^ill inEl'~e.tce ehe
<br />slope ••all on Clte ~•est and easC site, an,l cast-^est structure that ^ill
<br />control the slope anLle uu Che north anJ sul~th ••alls of the gnarr•'. (h+in;;
<br />Cn Che topo~•rapby, the ili.,'llesC ^all ••i.ll l.e ou tho •+esC sides, and sol~ie••ira l~
<br />to"er .•a11sJ••ill be Eurl~:e4 on Lae so:ll.lt a~,d north sides. 1'Ite ~asc •'a11 i.ll
<br />7~ be almosC non-existzat because the gnan•'• ^ill Ja••li••ht Co the easC. ~
<br />• '_~_
<br />r
<br />The north-south sCrncture Cuat Jips to the last has an avera,e di-h an~;;le
<br />of .',5-Je';rees. 'Phis plater sCrncture is as obvious control EeaCure anJ ••ill
<br />lil~~it the berw :1n•.•le to b5-d~~rees. '1'ha over-all slope aul~le •,i1L L•e less
<br />Chan Che b~rl~: au~'le; for a ••all ~•ith 40 foul (high) beryl;: anJ a 2''1 Pout catch
<br />bench, thu au%le ••ill l;e al,o~•t 4~-.lu~,;reas; Eor a •'all ••ith h0 Eoo_ I,erins an.J
<br />a 1ti Eout watch bench the an„le •~ill be about- 55-de;;rees. I:ecaus~i l.iis str~'cC-
<br />ute is ••ell Jef.iued auJ uo cu,rtiunour^., lo„ an;;le north-south strnccures ••ere
<br />found, this ••all should Le sCaLle '•u11 over the projected he i;;itC ,E '•;0 Puct.
<br />The sable conclusion is tale Cor the south •'all •'here Lire ,liL? of: the
<br />continuous sCrncture i^ Cile east-°•esC plane is favorable for stable slope
<br />of the berms at about G;-Je~;rees and over all slopes of about 55-,l~~rees
<br />••itlt 40 Coot beryls anJ 15 Eoot catch Lencaes. `lhe north .•all ••ill Le i„-
<br />tluenue.l by file lu~• ankle, sonl:Lerl; ~lippia',' ~+av, Leds. Fort-nnatel„ fire
<br />:•avy he•.Is proai.',it shear i. u'• across Cate beds anJ t~:~e lo•~• angle structure ~,ia•
<br />not he a controlling Eeal: re. 'LLB 200 to 300 Euot marl c'ts a shnrC ,li.s[ance
<br />to the south of the site contain this same structure (nr similar structure)
<br />anJ these cuts arv stable. llo~•e ver, out it laore exactin;; Jata anJ_ mini r ex-
<br />perience is obtained, the north ••all could be used for haul roaJs (as pres-
<br />~enl'ly employed and lo•+er slope an;;les.
<br />Kith the exception of structure un each side of. the fault, the placer
<br />JeEects appear to be continuous over ;;renC distances, and only the unwLers
<br />of the duEects cltan;~ed, not the apparent strike and dip. Therefore, the
<br />structure is expected to reu~ain essenCially the salae •~ithin the area of
<br />concern around and belo~~+ llle present r)uarry, and any minor differences can
<br />be accounted Eor by small chnu~es iu berl~~s ur beachs, or both.
<br />The data that lead Co these conclusions are in the folln••iu~ sections
<br />of Chis report.
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