HomeMy WebLinkAboutObservation of Excavation 07.22.2020l$l[lumer & Arscc!*les, lw. "
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July 22"2A20
Danicl Bucio
1160 Ballard Avenne
Silt, Coicr*da 8i,652
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Project Nc. 1S-7-124
Subject: ûbservationotBxcavetíon, Pr'opcsed Residçnce. Arnended TrarÅ3á,Antiers
Orchard, 239 LaFrenz Lane, Garfield County, Colorado
Daniel:
As requested, a represenfative of Kulr¡ar & Assaciates, '{nc. ct¡sened The excavatioa at t}re
subject site on Jaly 21,2{}2Q to evaluate the soiis exposed for foundation supporl. The findings
af aur observaticns ar':"sl recoff,Éïen<latir:'ns fur tLre f,or¡ndatisr:I desigi:l are ¡resented in this repûrt.
We previously conclucted a subsoil study for desígn r:f foundations at the site and presented our
findings in a report dated March 72,2{}79,Pr*jøaî. Nc. 19-7-1?4.
The prcposed ¡esidence is esscntialåy the safiie a^s described in ocr ¡'rrevious report and wilt be a
2-story strucfure above crawlspace with a slab-on-grade garage fìoor. Spread footings placed on
th* naturai soitrs anci sizetl fcr ari ¿llc'øal:le bearing prçssurs of 1"5'û0 psf were tiesigned for ths
founclation support.
At the time of our visit to the site, the faundation excavation had been cut in one level from 1%
to 7 feet l¡r*low the *djac*nt groimd s*rface. The ssils exp*sed in $:.e botfcm cf the excavatio¡r
consisted of relatively low density, very sandy silt with scattered gl:avel. No fi"ee water was
encoui*ered in the excavalion and" the sc'ils rve¡c slíghtly moist.
Tlre s<ril cçnclitíons exposed in the exçavattçn are consistent with thcse previously cnc,ou:rtcred
on the site and suitable for supporl of spread footings designed for the recommended allowable
be*ring prsssuie of 1,5Ûû psf with a risk of settlement. The soils tend to settle wtren weired and
precautions should be taken to keep the bearing soils dry, Loose disturbed soils in the footing
areas should be moistened aud compacted. Ûther recommendatisns presented in c¡ur previous
report v¡hieh are applicable should also be observed.
The recommenclations submitted in this letter arc based orì our observation of the soils exposed
witl:in the fourreìation excava:ticn and the pr*vìous sr¡bsullace expioration at ttre site. Variations
in the subsurface conditions belcw the excavation could increase the risk of foundation
movelTlellt. W"s should be advisecl af any vatjafio¡is ençountered in the excavation conditions tbr
possible changes to reconxnendattons contained in thrs letter. tlur services da not include
Daniel Bucio
July 22,2020
Page2
determining the presence, prevention or possibility of mold or other biological contaminants
(MÛBC) developing in the future. If the client is concemed about MOBC, then a professional in
this special field ofpractice should be sonsult€d.
If you have any questions or need further assistance, please call our offi.ce.
Sincerelyo
Kumar &,{ssr}cåats$* I¡¡c.
Steven L. Pawlak, P
StP/kac
Kumar & Associates, lnc,':;Project No, 19.7.124