HomeMy WebLinkAboutAddendum to Geotechnical Study 05.21.18il.={tr
-,, [# ry H{RJ ÞV$p\ffi
Geotechnical Enginearing I Engineering Geology
Materials Testing I Environmentral
5ü?fl ürunfy l{**ij 'i{i'i
{ilenwc*tj $prinç*, ** gt$*i
Fhr:ns: {S7iii g4b-7{ì¿}¿}
Fax: {t¡?il} S45**4|i/.{
Fniail: hpkglenlv**r!Skunaru¡s¡ì.{iüil¡
{){fiea L.c,ceticns: [J*nv*r {Hü}, Parker, tok:rçd* Íipring*, Ëo{ toilins, Sienwaod Springs, Sunrr¡rit üouniy, **l*ril<ia
RECEryED
May21,2018
ArJ6:t ü 2tI8
Jeff Powers G,
tåtgl County Roacl 320
Rirle, cororado 81650
ott'Tljç$fl'"tt?tiilJ'î
j ç& n dësriçp çrvql.ë,@er[ ål l.ç r!r]l
Froject No. l8-7-349
SLrbject: Acldendum to Geoïechnical Study Report, Proposed Residence, Lat T,Gilead
Ga¡ciens, Flarr.est. Lane, Garfi*id Connty, Colo¡ado
Dear Mr. Powers:
As requested, we are providing r.ecomrnendations for design of the prcposed residence at the
subjecf site. The services were performed in acccldance witli our iìgr€ement for professional
services with you dated May 14, 2018. Hepwortir-Fawlak Geotechnical (now H-P/Knmar)
previously conducted a preliminary geotechnical study fbr the proposed Giiead Gardens
subdivision development and presented the finclings in a reporf dated Ðecernber 29, 2û00, Job
No. l0t) 672.
Tire resiclence will be located ort l-ot 7 (previously shown as Lot 6) anci be a I and Z-stoly
structute above crawlspace iri the livin¡:. area and slab-cn-grade in the garage area. Shallow
spread footings placed c¡n the nat¡:¡al soils was the preiiminary recommended for-rndaticn support
for a resiclence at the subject site.
A roview cf the property was made on May 2A,2tI8. T'he snbjec[ lct was vacânt anel appeared
the same as described in the previous rcpoft. Improvements to the subdivision include
canstruction af Harvest Lane, a gravel road, and a smaÏl hclding ponrl located just north of the
Harvest Lane cul-de-sac and east of the subject lot. An agricultural building has been bniit on
the lot icnrne{iiateÌy uphill (soüth) of Lat 7.
The soil ccnditions in shallow excavatis¡r on Lot 7 are expected to consist of clay soils probatlly
suitable for support of splead footings designed for the reccm¡nended allowable bearing pr€ssure
of 1,500 psf The cla soils can have variable OT when wettecl
and mi cauicl cansist qf sub-exca the soils and lvith struûtural fill or
CX ta the dense dver encountered at 7 feet on the Ïot
d the bui excavatrr)n to confirm
reconl¡uentlations presented in thr-reccm¡lrendations
report ar6
IO
ancl shoukl aiso be observed
.leff P$$Jers
May ?1, ?û18
Pag*.2
The findings and recomnrçndations submitted rn this ietter ar* hased Ên {:}ìrr'*lr**¡:v¿rti*n of tire
site and the pievious limited subsurface explolation for the subdivision developnienf, Var:i;*îiçns
in the sribsurrfrce conditions could be encc¡untered during excavation ancl possibly clxlng*: th*
¡ecomrnandations contained in this letter. ()ur serr¡ices do not i¡icluds determining ll"le presnnce,
prevÕ¡råiûn or possibility of molei or other biolagical c*ntaminants {MOBC) developing in the
fi¿ture" If the client is eoncerned abcut MûRC, Then a prof,e*sicnal in fhis speciatr fieid af
pra*tice shsuld be consulted.
If ycu have any questions or need furtl¡er assislance, pi*ase cali o*r uffîce.
Sincer*ly,
H-F* KI-JMAre
Steven L. Pawlak, P.E,
Rev" by: DEH
SLP/ksw
€*ftr
H-P*¡¡¡¡y¡4¡
Project No. 18-7-349