HomeMy WebLinkAboutBuilding Geo-Tech Report 2007-8-8
COm 2ClJ1' 001 L/Lc
S
~ngineeril1g
K & II Engineering. Inc.
3327 RoallOkll Ave. fllgene. OR 974G8
(541) 684-9399 Voiee
(541) 684-9358 fl\)(
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Auljllll! S, 20D1
Project: 136.91
Catalyst Custom Hom~s
78G N,W, York Dr,. Su~e 2M
Bernl, OR 97701
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SUbjeel""f~~stf~
( Sprir.g~iiJ lOA? 2007,00121 .
"6~ 99"4ao.. Ave" Springfield, Or~gQ
PURPllS( AND SCOPE
As re<iuesteil;-K-&A. ' 19, Ino, hilS made a geolllclmieal evalLl!l!inn of the foundation solis exposed
ouring construction of a foundation pad for the proposed new slngle.family rnsluence to be COllslnJcl!ld at the
~ul1joct PIOjl;Ct site. Tile purpose of our evaluati<ln was to defermir.e the suilaniJIty ollha s!lE lor 1M proposed
r,-ilW fournlalion and to make on-site ree:)mmenda~ons for foundatilin pad constn.lClion,
LOT 9L
.__._-~.~-~...._..----
The scope of our S8111109S irn;luded several she viSits during founllation pad collstructioJl, h.place density
testing of fills. and !his rejJOlt
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FOONllATION PAD ,
TIUl project site is IOC-dled on the sou'J! side of the street at tile soiJlhwest corner oIl1le Intersec1lor. with
Moanlaingale Drive. The p1imnl'Y building pad area wes constr1.lC1ad during gmdll1g for the subdivision, and.
consists of a fill r;mgmg fram 4 to over jfi-fOOt in height Tha pal! sll'faee is level and is r.ol/llflld by a l.hil'l M (2
m3-inches) oj 'o/4..lnoh H crushOO aoorngma.
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8~ed on our visual inspection of the fill sioves, matenals used lor fill construotion appear to consist of
moderately well g<.roed to poorly gradedamJuia; baSllIt .pil-run" ltial ~lChKies large angular boolOer.;, cobbles,
gravels, arn! some silts,
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Qtll' undrJstandlnll Is 1ha! tl19S9 benched flllJlldatlO11 pao fills ware il1spoc!OO aOO apprO'~1llf by tile project
georechmcal anginoor for this phase of th9 Moulllainga!$ subdiVision, K & A Engilw.eling, Irn:, has no records cf
inspection records or final apPrtl\'al cf!he M l!I!l!lanlmml1ton the Slltllect project site,
Thern am no inrtk::ltions of slnpe movement III tt\e fiR embankment There Ms been mollllr~ta surface eruSiOl1
m lillll sllils from tM surlaaa ollila !fit amtsnkmem.
8UMl\1ARI"AIiIl RECOMMENllATUlNS
llammil SullllblUtv
The IOUllcatkm pa~, lIS COIlsl.rucllld, appears ill be suitabi& to SliPpOr! lIle proposed new slng!e--family residenw
SlJppmtelJ by a COIl'l&r.lkmal casl~n'placa concrete spread roll1ing louMafion, AdIlqU3ro inspllClion of the fill
to velify malertals aM conslruc1icn is costly aM MYOl1d the swpe of OlJr S<J1\IitllS illlhis time, Because we did
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K <'I 11 EIIgilleering, lac,
not il'lS\1ect construotion ct Iha e<isling 1m:' inO\llilin;;j Sllllgmw P[~p:lffitlon and fill m<lt~r!a!s am! ))laccment, we '
cannot certify sufulbillly of ll1efoundalion Pad to SUilPOr! the pmposed foundalion,
We recommmd that the Cily of Springfield pl1]'lide !locufllllnlaliOn 01 inspeotion and eccopt~nce of this
foundation pad by the subdhfision geolechmcal engineer prior to cOllStruction o.f al1Y lou11dation,
Fwnlfulloo Sulljlllfl '
" materials thro1Jgi'.oot tro fill embankment are con~is1l;nl with what is axposoo on lhe sides of the fin
embanlure!1l (casalt quarry 'ptt,ron'1 and ~ the sull1;rnde lIIas properly prepared poor to placermlllt entle!lll
embankment (la, all orgil11ics and other \Insllit;ole soils stripped to firm undis!Ur!l9d na~vo soil or bedrock) ~ is
Ollr opinion that the fin emDar.kment would be su'ilabla to SUPPort the propo>e4 foundation,
WerllCcmmend 1tlaf conventional cast.ifJ--place t'Ilncrete spread footing syslems Ire Wnslnlc!OO ill lhat the
fooUng edges facing tire top adge 011118 fill embankment are no closer than the heighluf the fill at that location.
~OO$1ve So~c
Based on oor obs?1'Iolions at the fill emlJan~ment tl is oll!'opioion it is not Hkely ltmtlfmm am slgnitlCallt
h&onls from expansive solis,
llrilinago OOld Erosion
\'>ffl recomrmM ti1m f!riai grunion if 100 site, 1lflu wfllllrUCliun of the fOUOOillkm, sl()pe away from Iha struot.re. .
Care shtilJld Ire l;\kM !Ii avoid COllCe1'1trallng sUllace rur.off onto the exposed aiOped face 01 the existing fill
embankment
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The I!xpo>ed face 01 alllills should 00 freat1d willi vegelaliOn CI olimf means tlll11iniml1.e surface erosion,
lIMITATiONS Of TillS REPORT
Tl'Js report hasbJlml pmjlafOO for the axcilislva use of G-.ml)'sl Custom Homas and itS design f,OnslJllarrts or
sUPcoo!rnClom fOf lha SUbject pruposad s!ructore,
Thls geotochnic.ai inVes!igalion, aruJlyms, and ffiCOmrnarulations meelllle stmdards of care of comr,etenl
geat&CilniCai enginlllllS providi11g sin~1a! sSlVices a1 t'W time lhesa ... .;".~ were provlder., We do 001 warrant
or QUll!ilnree ilreSll rocommlll1datirlllS, site surf<l>'le. (If subslirtm;e cOIldm,,"s,
The ~ope 01 our seMees does rml inclocte'~onstructjoo safely precautions, tecl1r1\ques, sequem:es, or
proceuW'..s; axcept as speelflcally reoc",,':<>";';'~ In this report. Our SllI'J!ces
~hould 110t t-e interpreted a_an etwironmental asselismen! of site\.'{mditiuns.
ThmK.yoo tllrl!1e'opportuntty to Ii1l of oolVica, Plerurecall us n you hil\'$
quwlll:ms Of naw further assis-llll1Ce, ,.
Sincerely,
~E
i( & A Engineering, {ne,
Proiect 135.07 6199Ja1leAve" Spriugflekl, tlregoo
Client: Catalyst Cuslom Homes
Page 2 of Z
AugUSlIl, 2007
l ~eii'llnforma1ion
~W>>Kll1b Build On
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July 2,1,-2000
*REVlSED FEBRUARY 16, Zotl7" '
Mr, Mark Vukanovich
Suntrust Land Company lLC
780 NW York Drive. Sulw 204
Bend, Oregon 97701
Re: Earthl<<'Ork Summary Letter fur IndMdual Sulldlng Lots
Mountaingate SubdlYlslon - Phase 4 Lots 1 through 129
Springfield. Oiugcn 97478 .
PSI Report No, 722-65013.10S
Deaf Mr, VUKanovict1:
PSI Is pleased to submit our sarll1\.'W:lrk summary letter al'ld geolBl:lmlcal requirements
fm lrn:!ividua! building lots fui the !\f.ounlaingale Subdivision Pha!le 4 - Lots 1 through
129 h, Springfield, Oregon, PSII1as been providing obaarvatiOO$ during oonstmclion of
tl':-e building pads from FePr\illfY 9. 2000. to present The earthwork WllS performed by
Oakridge Sand and Gravel under the direction of the genera! oontraclOr Eugene Sand
and Gmvel. Observations during Olff sit" vislts were oocume1lted In. OUf daily field
raporls whIch wl!re Iypad and contained a site plan ihowing the areas the contractor
was workirlQ 011 thosScillys, Please re~rm'lCe those reports 722-65013-1 through 7'12- ,
65013- 102, Copies of thosa reports \1Iel'e also provlded to EUgene Sartd a.'ld Grovel.
Oakridge Sand and Grave,. Cit}. of Splingfleld. 8nd The Faw5aIJ Group. Based em O\lf
oblre!Va1icos d\JIing !ha time frame mentio~dabQIIe, the earthwor'<< was pertormed in
gen~l a\M,.J~"t;S "11th 1l'w project ,;<w;~.!;;"ical rsport prepamd O}' Soire and
AMociatao, Inc, ellled AprilS. 2004, aty of Springlll!ld fequlram~nts, aM spplicabla
provisions of the current International Building' Code.
The ~dary purpose of this Iettar i.to QUtline ge(lter:!'mlqal en..:' ,~", JIg inwstigalioflll.
thai should be completed for individual lOtS. 1 lhmugh 129 prior to resklenliai
c.onstmcliclfl. To be COl1Slsteilt wi1!'l Cffisril;l established duling.construdion for}:>hases 1.
2, end 3 by Saito Associates, Ine, end KA EhgI1'll\H!ling In iellern dated F~.bnJary 10,
2005 lIDd Martl1 23. 2000. Ie$pedlvell', we al't> l'l!CbInmending Level I and Lave! 1I
ge",."..,,,)(2: ilwes1iga1icflS ooparfo/med on l.ots 1ihrough 129 liS follows:
Le'll!! 'l Gn~illcslll1\tSstigatiot1
Ta'o$ conslslllnl wUIl tlw previously sunml!lad reports. we recommend.. level i
geole<:>hniqal invlssligalilm be ped,,;> ",,,{i fo~ tl-le residential building lots where the
$U!)sutfacl!l condilions are I<nown to consist of competent ooil Of rock' and have been
obseNeti . by PSI during grading operations perfurmsd by the ellrthwork contractor,
Lois if! tl1a MOurUaingate Phase 4 'area that fuU In\<', Ihis g;afeQOfY il"" 7 through 2.3, 29
L'1rougl1 $4, 4{l ihrough 1:>1 . and 74 through 101.
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~~t.~ S'lm<tt1E' Ir!d::~t.~. frn:." t(Jf.o.A-S~~i'/ ~'ire~f'" S~:':9i",1.:tO~ ~1~7? ..9'ti(JfSe &Hn4~'" r~E41!1~i'HJJ
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Earthwork Summary Letter for Individual Lots
Mountain Gate Subdivision - Phase 4 Lots .. through 129
Springfield, Oregon
722-65013
Page 2
in gensl'll!. ltle lots in Level 1 should not l'llquire s).1ensiVe grading operations to
construct 1l1a single family residences, A=nJlngly. a lot spacffic geotechnical
snvestigation Is not expected for foundation design prior to construction of the level 1
resioerrtial huildings,
We recommend lhal II geo1adlniCl!i engineer or representative observe these lots duling
excevallon to verify that the above listed conditions ha\le been satisfied and the
subgnlde conditions are suitable far construction. .Il.s a minimum the geoteci'lnical
engineer should pmvlde:
1, Verify that sits work d0!3S not edwrsel}l impact adjacent lots, utmties. and
strael improvements,
2, An examination of an foundation exca\ll!licns during construcllon to verify
design cri!!lria assumptions and to provIde recommendations. if ne~9ary,
3, Note any special. unexpacted, or latent conditions that would requlre- a Ie'ffllll
investigation.
"PlilfGgraph removed regarding p#'oofr(,l/Ied lots. The surfaCG soils \vill be
addressed during tile LeVGl1 GeotlilChllical Investigations..
As mentioned in our prelliously submitted reports, LOts 97 through 99 have been capped
,'I>'il!1 malOOal that is polllntiany expansive based on laboratory teslll. This material
lillouJd 00 removed prior to residential construction.
LeYfll :2 Go~hnic;allnvestigll.1iDn
We suggest a Lavel If In\leSlig!Jllon lle completed on all ather remaining lots in Phase 4
"mere no grading ~I'",...;;ons haIlS ~ been periormed anti the lots are CUm!nny in their
, natural stste. . Some of theSe lots may be steep. the subsurface conditions unknown.
and slructurlil fills alldlm- retaining walls may hi! ..",,,,.j;;':, We reoommand lots l' through
6, 24 through 28. 35 through 39, 52 through 13. and 102 l>'lfOUgh 129 be induded within
the leval Ii category,
In general. too 10\5 !fll.e-IISI 1 may raqulra eJrlensiw earthWQrK or gral:lingoperetions to
OOl'ls1rocl1l1e single family residences.
For lals within 1l1ll Level H categl;lry. ~ ~oommend l'l Sit" ........;/:o geolschnlcal
ifl\ll!lstlgalion be completed priOr to hOme site devalopmenl. Within thase areas.
particular attention should be given to: unstable ground. soR/wet soil conditions.
el!]:1anslva soils. dfainaqe, cutslfills. aM retaining walls, The following items are
suggeslOO as minimum requIrements for the geotechnlcal inVllstigation repcrts,
EarthWork Summal)! Letter for individual Lots
Mountain Gate Subdivision - Phase 4 Lots 1 through 129
springf.eld. Oregon
722-65013
Pege 3
" SUbsurfaCe explorations using, either exploratory jest pits andlor soil borings Ie
determine foundation condtllons.
2, Laboratory' analysis of !he soils to include at least moisture comer.t and dry
denslty, gradation. ano Atlerbarg L\mits tests, Tesijng may also include
Expansion Index ff the soil 15 potel1lially a;.cpansive based on visual analysis.
3. p,',written report prepared by a qualified ge1'ltechnlcai 6nginser that summarizes
the site condfiioll$. presents the leooralOry test results, and addresses the
recommendations for culs/fins. foundations. drainage. retaining wall$. lInd other
itemll that mllY be rnlcessary to tI'le deVfilopment of the proposed' !'!;Sidence,
Similar to Level I lots. we recommend lf1at a geotechnical engineer or represenlBliVfi
obServe t'lese lots during axcS\lalion to verl1ythal the above liGte<l'com;!itiallS ha,~e bsen
$Il1isl'ietl an<! the S<.lbgraee >:cnditions are sWtab!e for constructio~. As 3 minimum the
geotachnillalllngineer shou 10 'provide:
1, Velify that slte iiotorIi does 1101 adversely Im1'1iI;::t llt1jacIl111Iotl, utlliiles, and slreet
improvements,
2. i\,n elll!m1Ir:.ation of aU foundation e>:t;avetlons during construclioo to wrl1y design
criteria assumptions and to provide recOmmendations, if necessary.
3, Note any spacial, unelq)ected. or lalent conditions that woUld mquire a level II
inl/ssllgalion, .
Ills reeommenoed that PSI be retained to examime and idenlify soli lallPosures created
during llroj$(1t'lilXctJlIlliioos to verify that soil conditions are as flfllicip$ted. We further
reco",,,,,,,,J fua! stru;::turai f1!s. if any; be continuously observed. and tested by our
representslMl to evaluate the thoroughness and uniformity of _"I'",ctiOn. Samples ot'
fill matertals should be 5tlbmilled to 0\.'1' laooratDfY for evalualion prtor 10 placement of
fills on site. '
Thlli report is for the excliJslve use of tl1e i1\(ll!ressee and l!lelr representative to design
!ile proposed $tru~ \1e$!:rlbed herein arld to, .... .',;.,,, <. constru&.ion documents, The
data, analyses, ami moommendatiofls may !'let be appropriate fur other structures Of
purpl'JSe1i, We ,""'~''''''''Hll that parties contemplating otl'lllr stRictures or purposes
oontect us, In the absence of ,our written appnwai. we make 110 feprnsenlation and
assume no resJjoosjbitity to other ptlrties regarding it1is report.
The, reCOmmef1l;!atlons l:oniaiMd in this reporl are based on the avaija1:lie subsulface
information obtains:! by PSI, 1111'ld design deillijl> furnished for the proposed project If
them are allY rellislol1$ to the plans lor this project, Of if ooviaiions from the subsurface
ool1l:liliol1s Mtll(! in this report are enco\lntared during construction.' PSI $iloulfj be
!lotlf~ lrnmlillli8taly to determine if changes in the founoation rer:ommendilillons are
required, If PSI is not retained to perform these functions. PSI ...'ill not be ,,,~t'...,,llible fur
the Impact of those conditiOns on the project
Earthwork Summary Leiter for Intllvidua!Lots
Mountain Gate Subdivision - Phase 4 LoIs 1 through 129
Slliioglteld. 0"'900
722-65013
Page 4
SeNices pelformed hy ttw glXl!eel1l1!caJ eogmeer for this pmiect ha.-e been oondooloo
with fhat level of care and skHl ordinarily ",....";"';'d by members of the profession
currently practicing In this area.' No \~.......,;>. expressed or implled. is made,
Respectfully Submmed,
Professfo'131 S~ It'i~ me.
~\J~
Raymond V. AUperti
Pmjel;! Manager
RVA:rv13
c: Eugene Sand and Gravel
Ollkridge Sand and Graval
The Favreau Gr.ouP
City of Springf\eid
Attachment T!lble of levei 1 Bnd Level 2 Lois
j
Charles R. !.;one. P .r:,
Senior {k",.,...!.. ;&111 engineer
1l!~!'J lnformation
I:!:.<O>> . .1bBuildOn
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Mountaihgate SubdiYislon Phase IV Table of Level 1 and 2 L,ots
, LOn ...H.^...........~._"" ""1"-. "-"IEVELY I . o "tMLf \
..................,... I ......_-..~... .., ........,...,;,y.... ,....ol>l
, l'
I 21, , ,I
"
I 3 "
I 4 .J
! /; .J i
~ -I j
I 7 " 4
1'>, 'Ii
I 9, " 1
10 "i I
11 " 1
12 " 1
13 1/ 1
14 .J I
15 --:r
16 "/'
.17 ~. f
18 "i I 1
19 " --.........'
I
20 "i I I
21 " /1' 1
22 " I I
23 .J' I
24 "J
25 1/ i
26 "i I
27 " {
I 2ll "
I .29 "i ..~
30 --I ..
31 I -;
32 I .J
33 r .J
I 34 I oJ
35 ---+- .. I
I 36 " I
I 37 "i 1
I 38 .-4 I
i 39' "
40 "i I
41 " 1
42 ,. "i J
4J "i I
44 .J I
4-5 "i I
4e 1/ I
.
Moutsir.gate Subdivision p~ !V,s!>!e of Level' and Level 2 i..<ll>>
. ~nM~fl~ ~~ tsm....1D.m-A Shea..""I~~~":e:~~oll:-l:6. O~'~71.pn.~~541..7:ie-0048''' ~'5-t1ft'~n6S
Psge 1
T.,g "silJnjoYr[iation
M.~ ,._c... ,To Budd On
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~
Moul1tflingate Subdivision Phase IV Table of Level 1 and 2 Lots
r~~#--~- m:== ....!:.EveCr"...' T ....[~~:~=f
..........;; r
4l! -J t
49 " I
50' '</
'51 ,j I
"51 '</ I
53 ,j
54 " 1
I 65 '</ i
56 .. I
I 57 '</ I
.I 55 " I
I 59 .. I
eo i "
I 61 .. I
62 , -.J I
~ 63 I --I !
, 54 I 'i
65 I "
elL I '1/
67 .J I
I 6s ! \' I
I 59 ! ,
'</ I
I 70 " I
I 71 --I I
~2 '</ ,
,
! 73 "I
74 -oj, !
75 "
76 ..J I
77 .J I
7ll -1
I 79 '</' j
L_1l9 ,I I
i 81 'i
82 ,j \
10:> ' '</ I I
.i 84 .J
.- oJ I I
55
86 ~ ,1
67 .J I I
-lJJl. -l !
69 .; ; (
w " I
91 -I
92 " !
MouleiJ19"l<> ~it>" Pha...-lV r"bIe or l.l>val1 aM LlMll2 l..Olt
*,?~1 ~iwjndum~. fnC-." 100itrA $Iw:~:3'l Sl~~. $p~lt~M, OR 91.11177''' ~U.":i';:5~Mf:1.6-'9tM~9~$,~H';.rS8-nS3
P"gs2
l r;$ilJ~formatiOn
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MOl,mtaihgate Suhdlvision Phase IV Table of Level 1 and 2 Lots
.l.or$'~""'TLtvaf' .... -,uT:E\leC:Cw I
u9S--uuu>>u-----'-r...'. ~.---....:;r.u''"......._., ... ...'1
fM _..'1 oJ I
% ~ I
00 oJ, I
97 -;
9ll oJ
9g oJ
100 >I
101 oJ
102
103
104
105
106
107
Hlll
'09
110
I
,
,
j
i 112
I 113
114
I 115
116
117
118
<I
-I
-.j
" !
~ 1
'>I I
.. ,
,
--1
oJ
"
'i
..
"
,)
..;
..
-;
oJ
,)
"
,)
oJ
-.j
v
-;
"
-;
-J
111
I 1 ~g
I i2C
I 12'1
1 122-
I 123
I :~:-
i 126
L ;~
! 129
I
!
+-
I
!
Mo\Jtl!ii1gaIJ9 Sutdivisloo PhalIe N Tab'" of l<>Vlll1 and Level 2 Lllls
Pro14r~~ B9~ l!'!-!!ii$U1.t~ 1M.61U~o-A$fl;.'*" Stll;Nll'" S31ri~: OR 1H'~n''''~ $.i1n43.~..,~'JI'541Jr,~e...n$
~s