HomeMy WebLinkAboutObservation of Excavation 04.20.17H-PryKUMAR 5040 CCIunty Road 1 54
Glanwood Spilngs, ËÕ 81601
Fhone: (970) 945-7980
Fa* (e7û) 945-8454
Ëmail: hpkglenwood@kumaruse.eom
Ss*t*6hni*ãl ñngin*ering | #ngineering #s*T*çy
i",let*rinls T€slinü | Errvir*nmental
Ðffice Lceations: Parker, Glenwood Springs, and Silverlhome, Colorado
April20, 2017
Uriel l\¡Iellin
144 Cliffrose Wäy
Glenwood Sprirtgs, Ct¡ft:ratlo I l60l
u ri-el. nçl I in @ hstmai{.gcffi
Project No. l7-?-313
Subject:Observation of Excavation and Structural Backfill Testing, Proposed Residence,
Lot 30, Pinyon Mesa, Cliffrose Woy,fiarfield Cûunty, Colorado
Dear Mr. Mellin:
As requested, a representative af H-P/Kumar observed the excavation at tire subject site on April
14,2tl7 to evaluate the soils cxposed for foundation support. TVe also tested the compaction of
structural backfill placed for footing support on April l7 and 18,2017. The findings of our
observations and recommendations for the foundation design are presented in this report. H-P
Geotech (now H-PlKumar) previously conducted a subsoil study for design of foundations at the
site and presented the fîndings in a report dated March 25, ?û16, Job No. I l6 0444.
The proposed residence will be a two-story wood frame structure over ¿r crawlspace. The
attached g¡uâge will have a slab-on-grade floor.
At the time of our initial visit to the site, the foundation excavation was mostly complete. The
foundation excavation was cut in one level from I to l3 feet below the adjacent ground surface.
The foundation excavation was sub-excavated to a depth of 6 feet below design footing grade.
The soils exposed in the bottom of the excavation consisted of medium-stiff, silt with sand. No
free water lvas encountered in the excavation and the soils slightly msist. The results sf
compaction testing performed on the structural backfill indicated th*t the backfill was suitable
for support of footings. The compaction test rcsults and n standard Proctor compaction test and
classification analysis performed on a sample of the on-site backfill soils are attached.
The compacted soil conditions exposed in the excavãtion nrc consistent with those previously
encountf,red on the site and suitable for support of spread footings designed for the
recommended allowable bearing pressure of 1,200 psf. Loose and disturbed soils should be re-
compacted or removed in the footing areas to expose the compacted soils. Other
recommendations presented in our previous report which are applicable should also be observed.
The recommcnd¡tions submitted in this letter are based on our observation of the soils exposed
within the foundation excavation and the previous limited subsurface exploratíon at the site.
Variations in the subsurface conditions below the excavation cauld increase the risk of
foundation movement. We should be advised of any variations encountered in the excavation
Uriel Mcllin
April 20,2017
Page 2
conditions for pomiblc changes to rccorumendations contained in this letter. Our services do not
include determining the presencc, prevsntion or possibility of mold or olher hiological
contaminants (MOBC) developing in the future. If the client is concerned about MOBC, then a
professional in this special field of practice should be consulted.
If you have any quesÌions or necd further assistance, please call our office.
Sincerely,
H-P\ KUMARwr,%
Thcnras J. Vfesthoff
Revierved by:
D*nicl E. Hardin, P.Ë.
Atl¿¡chnænts: Figurc I
TllV/kac
Figurc lA *tribution Report
Eurthwork Cornpact cn Testing Reports i4 Pagcs)
'{"P
L KUMAR Pralecl No.17-7-313
*GMPAtrT}ON TEST REFORT
112
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Maximu¡n rlry rlcnsity = !08.5 pe f
üptimum rnoisture * 15.4 %
Sílt rvith Sand
Project No. ¡7-7-J l3 Clíent: Uriel Msllin
Project: Lot å0, I'inyon Mesa. Garlield ea*nty, {r¡lorndc
marks:
See Ëígure lA fsr e lassificãtion resuh:i"
Lasation: Sitc Stuch e Nuffiber: 050-l?
Kumar & Åsçociates, lr¡c.
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Test*d By:KC]ehccked By: tF!{
Particle $ise Ðistributicn Report
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Remark*
Sc* l;ig*re I for stan¡laxl ilrcctsr ccmpaetion rrsults,
Kumar & Assocãatesu lnc.
Gåenwood $prings" Colorfrdn
tlienh Urieltr'lellin
Froleet: l.*l¡ 3{}" l}inyan lVlt-"sa. tarfit:ld County. Colçr¡il*
FroÊect F{a: l?-?-3 l3 Fisure lA
Tested By:Kû Ëheched Ëy:nËH
Depth or
Ëlev.
Test
No.UndEr-fcotÍng Backfill
Loeation Field Ðry
Eensity
(pcr)
Field
Moisture
Contenl
Ys
Field
tomp.
(%)
Min,
fromp
Req.
{Yo}
Proctor
Laþ No.
'l '12'S of NW tsuilding Ëerner fnating
græda 11f .3 11.2 I r!3 $s û50-17
l{Ë Building Corner 110.4 13.2 102 050-17
Lab No.Description
footing2 98
Method Max. try
Dens.
opt
Moist.
050-17 ASTM D 6S8 Silt with Sand "tfl8.5 15.4
H.P*I<UMAR 5û?0 County Road 154
ßlenwood $prings, C0 81601
Phcne: (97$l 94S-?Sgû
Far {9Tû} 945-84s4
Email: hplglenwaodtôkump¡gs.a.çg¡D
l.iS*i¡rîlli:r,*'¡ i;:lti¡rrtil'l:rr:* {: {; 1.:¡ i
i..i*;r:t::,rl:i '¡¡;t irlriì I i*t",i:l^ ,' " '.
Office Locati*ns: Parker, ßlenwood $prings, and Silverthorne, Colorado
E*rthwork Gompåct¡rn Testing Report
6lient:Urlel Mellin
144 Cliffrose llVay
ffi lenrÊrood $pringn, tolorado fi I 601
U riel. mellinlıhotma il. eom
Froject No":
Report No.:
1T-7-3r3 tay:
Date:
Page:
Monday
4/,17!171of2I
Froj**t: Froposed Resideneæ, Cliffrose lñlay, Lot 30, Pinyon ß4esa, Gærfield tcunty, Colorado
Wealher: tloudy, light wind, dry Temperature: 4So at g:30 am, 73" at 2:5Ð pm
Earthwork Contractcr: Montanez
Ëquipment Used:
Þescription of ñarthwsrk
Tested:
Sæmple{s} CIþteined:
Verbal Communicatiçn:
Trackhce, mini*hoe, Wacker RT rsmote double drum roller, garden tse
Two site visits were mæde today to test under-fsoting structura! backfill. Ons
test was initially judged to be below recommended compaction. After
additional eompaction a re-test was perfarmed, Final results were judged to
indicate æcceptable compaction and moisture csr¡tent. Referance Proctor for
the site was not availabls at the tim* of testing.
One large bulk sample was eþÊained frcm the site stockpile and suhmitted to
our lab for standard Proctor and classification testing. Lab r*sults are attached
and conlirm that final compacåion tests performed this date vÍere acceptable.
Fiçld test moisture cçntents ranged from 4.2% below to ü.3% above optimum
Lcw moistureË were due tc backfill placed on 4115117 havÊng dried prior to
testing.
Trackhoe oper*tor was infc¡"med of our test results.
Placement and Compaction Procedure: Nat obs*rvad by H-PlKumar
L[ft Thickness:
tompe*tor{s} Used:
Max. Rock Siee:Mçislure
Conditioning:
Number of Passes
Nuclear Ga M Test Results
Froctor $arn Reference:
cÕr,rPAcTrv€EFFOÊI Ât',$LIOISTUÊË Tü FILI.tluRtN6 T}IE nÈlÊg WHÊN OUR 08åËRv€R ts 0ãsËFv[,rG OPËËÂTIÜNS
THE NUCI-SÂN OE$ISOMETER MÊfHÕü üF IESTINg IA'A5 USEO IN SUBSTANTIAL ÀCCORüÂNËC WIIH ÂSIÂô N 6938
Thomas J. Westhoff. tET Daniel E. Hardin, P.E.
TJWI Field Technieian Reviewed By
H*P*I(UMAR 5û20 County Road 154
Gfenwood $prings, CD gtgOi
Phone: {970} 949-7S98
Fax: {970} S4S-9454
E ma il : bt¡lolenwpod @k_u mqru, Sa.com
ì1lar,-::i:t-'jri,,;'i': l::i".;iit*.lllr',rtç : L.ri¡;¡¡i¡+¡'r; ,Iirì {;Í+lû{:\:,.
l.ii,;i.;it:¡!Í,"i4. ¡¡"1'1 j J, I "."iÌ.:':t,.','",.1
Oflice Locations: Pårkêr, Glenwood Springs, and Silve.rlhome, Cotorado
Earthwork Compact¡on Testing Report
Client:Uriel Mellin
144 *iffrose wËy project No.: 17-7-319 Þay: Monday
Glenwood Springs, Colorado 81601 Date: 4117.17uriel'mellin(Ðhotmail'com
Repor-t Na.: 1 page: z CIf
Froposed Residence, Cliffrose Way, Lat 30, Pinyon Mesa, Garfield County, Çolorado
2
Project:
Nuclear Ga e Moistu Test Results
Test
Nc.
Location
Under-footin g backfi I I
Depth ar
Field
Dry
Density
Field
Moisture
Content
Field
tomp.
{olo}
Min.
Comp.
Req.
Froctor
Lab No.Ëlev
Yo
3 20'$ sf NE building corner l'below
1 1"t "5 12"1 103 98 050-17
4 20' N of Sìlll huilding cornèr 5'below 106.9 14.1 9B 98 050-17
ã 30' N of SW buildîng ssrner 4'below
footino qrade 1û4.2 f 4.û gÊ 98 050"17
5A Re-test of #ã above 4'below
footing qrade 106.8 f 5.0 g8 s8 050-t?
2'below
foating orads
,l05"96N. garage footing, lû' E of W
side of buildins 1å.7 98 s8 050.1?
106.4TI
B
I
SË building corner 4'below
footínq grade 15.7 98 g8 û50.'t7
25'N of SE building eorner 3'below
footins grade 'ttB.0 1{.3 100 9S 050.17
E garage footing, 15' N of SE
cörner of qaraqe faoting gradu 108,9 14,6 100 98 05t1.17
Garage SE corner I'below
footínq urade 110.6 15,2 't0210 s8 050.17
I'below116' $ of NE corner of garage 109.0 11.3 100
DescriptionLab No.Method
s8
Max. Dry
Dens.
050.17
opt.
Maist.
il50-17 A$TM D 698 $ilt with Sand 15.4108.5
TI{E }¡UCLEAR DENSOMET€F MÊTI,JOO OF lESTIN* WÅS IJSËfi IN $IJF$?AT¡TIAL ÅCCüft*ÂNTä l¡J¡II{ ÁSThl ÊiE?3å
TJw/
Proctcr $am le Referencg: '
Thomas J. Wpsthon CET
Field Technician
Daniel E. Hardin, P.E.
Reviewed By
H-P*l(UMAR 5û20 Cnunty Road 154
Glenwood Springs, CO 81601
Phone: {970} 945-79s9
Fax {970) 945-8454
Email: hpkqleqwood..@lgrryaruga.com
{ì*,¡.:i¡'ri' i,:;.. j i:r'rr:ií1itF:tiüü i Ifì;ì rì**r'ri]iqj ij{,.ìû.,Ë.F
f.ì;ll¡.t,¡ii: ji:'I .i I i rrvr¡¡'';¡,' ¡t1¡i1
Lift Thickness:
Campactor{s) Used:
Office Locations; Parker, Glenwoud Sprlrigs, and Silverthorne, Colorado
Earthwork Compäction T*stÍng Report
Client: Uriel Mellin Project lrlo.: 17-7-313 Oay: Tuesday
144 Cliffrose Way Date: 4118/,17
Glen$rood Springs, Çolorado 8f 601 Reporl No.: 2 Page: I of 2
Uriel. mç![in@hotma i!, pen
Project: Proposed Residence, tliffrose llVay, Lot 30, Pinycn Mesa, Garfield County, Calorado
Weather: Partly cloudy, calrn, dry Temperalure: 46" at 8:30 am, 73o at 12;5ü pm
Ëarthwrrk Contractor: Montanez
Fquipment Used:Trackhoe, mi ni-hoe, Wacker rsmote dauble drum , garden hose
DescriptiCIn of Earthwork Two sita visits were made today to test under*footing structural backfill. OneTested: teet was initially below r€commended compaction. After re-warking and re-
compaction an acceptable rE-test was obtained. Final results indicated
acceptable compaction with moisture contents ranging from 3,1% belor¡r to
0.7% above optimum.
Verþal Communication: Trackhoe operator was lnformed of our test results.
Pla*enrent and Compaction Procedure: Not observed by H-F/Kumar
Max. Rock Si¿e:Moisture
Condilioning:
Number of Passes:
Nue lear e Muisture/üe Test Results
Proctor Reference
Êt{
C0tllÊACrl\1ü ËFËûnT ANt Mtt$TUft* rû Fllt ÊURINÊ rHE llMÊ5 wHEf{ eUR O$SEnvER l5 NOT Og$frnvlNG ÕPË*ÀTI*HS
THË f.¡UTI,EAæ äEN$üI,IÛT[,& MËT¡.IÕN üË TãäTING WAS UgEÞ IN SU&TTÀNTIAL ÃçTäflÐÀNCÊ $JIΡ1 ASTM Ë åSJ&
Thornas J. Westhoff, CET Baniel E. Hardin, P.E.
Test
No.
Location
Under-footing Baekfill
Depth or
Ëlev"
Field Dry
Densily
(pcr)
Ëield
Moisture
Content
Yo
Field
Comp.
{rå )
Min.
Comp.
Req.
(o/a\
Proctor
Lab No.
I SW building cornÊr f 'below
footinq qrade 111.7 1{"5 103 98 05CI-1?
2 0.5'below
footino orade20'N of $W buildlng corner ?.3.11 14.5 103 98 050-17
3 6' W of $E building cornËr I'below
footing qrade 10ç.2 13.6 s8 g8 05t!-17
4 1l!' H of 5E building corñer 2'beloi¡¡
footins qrade 1f 0.7 12.3 ',02 s8 û50.17
2'below20' S of NE building Gorn€r 11{}.0 14.O 101 050-f7
Lab No.Method
5 98
tion Max. Dry
Dens.
0pt-
Moist"
ü50-17 ASTM CI Ê98 Silt with Sand 108.5 ls.4
TJW/Field Technician R*v[ew*d By
H-P*IflMAR 5020 County Raad 154
Glenwood $prings, C0 81601
Phone: (970) S4g-79S8
Fax: {970) g4S-84S4
Email; hp$gleqwood@kumarus4csfu
Of{Ìce Locathns: Parker, Glenwood $prings, and Silverthorne, Golorado
Earthwork Cornpaction Testing Report
Glient:Uriel lvlellin
r44 criffrose ïvay Proiect No.: 17'7'313 Day: Tuesday
Glenwood $prings, Colorado 81601 Date: 4l1Bl1Z
Report No.: 2 Page: 2 of 2
U riel. rnelliüffi holm ai l.csm
Froposed Residenee, Cliffrose W"y, Lot 3CI, Finyon Mesa, Garfield County, ColoradoProject:
Nuclear Gauge MoisturelËensity Test Results
Test
No.
Location
Under-footing backfill
üepth or
Elev.
Field
Dry
üensity
{ocf)
Field
ft¡loisture
Content
(o/o)
Field
Cornp.
{%}
Min.
Comp.
Req.
l"/,1
Proclor
Lab No.
6 6'N of $W building corner footing grade 112.6 14.9 104 g8 05{t-17
7 12' E of Stlf building corner footing grade 112"2 13.7 103 s8 050-17
I 4'W of $E building Ëorner footing grade f 04.9 18.6 97 g8 {¡50-17
8A Re-test of #8 abs¡ve footing grade 109,3 16.1 I tlt 98 150-17
s 20'N of $E building cornêr footing grade f 1t.r 14.4 1ü2 g8 050-17
Proctor Sam Reference:
THE I¡UCI€AR DENSOMË1ËR MËTHOO OF TESTIH* WAS U$Ëä IN SI}B$TÅNTI{L ÂçT*¡IfrÅI-¡*Ë W!TI,{ ÅgYM ãå93S
Ïhomas J.l,liesthoff, CËT Daniel E. Hardin, P.E"
TJWI Field Technician Reviewed By