HomeMy WebLinkAboutGEOtech Addendum - BLD Engineering / Geo-tech Reports - 9/19/2015 6L Do?0) - a%a ?
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REPORT
RECEIVED
LYNETTE PAYSON SEP 2 2 2015
101 E.STEVES PLACE
ALLYN,WA 98524 426 W. CEDAR S T.
RE: GARAGE LOCATION
PROJECT: XXX E.STEVENS PLACE
ALLYN,WASHINGTON
?-6 C6 (� PARCEL#: 12220-34-90363
09/192015
Dear Lynette Payson:
At the request of Dawn Miles of Town and County Post Frame Buildings, Lynnwood, Washington,
Curtis D Cushman L.E.G. visited the above property to inspect the location and suitability of a pad for a
proposed pole-type garage on a concrete slab built on a thick gravel pad. The primary purpose of the visit and
concomitant literature search was to verify the validity of the May 2010 Slope Assessment made by Wesley R.
Johnson, P.E., of N.L. Olson and Associates, Port Orchard, Washington. The update was requested by Allen
Borden, Mason County Planner, in an email dated September 4, 2015. Cushman was escorted on site by the
brother of Lynette Payson.
GENERAL
The original assessment was for an addition to a pre-existing residence located in Plot B, PN# 12220-34-
090362. The proposed 12' X 27' addition has been built. The proposed garage is located approximately 80 feet
due west of this addition on a gravel pad that is in place. Inspection of the exposed geology shows the deposits
to be glacial in nature, such as Qgt, glacial till. There is no evidence of nearby slides or slumping and the
CZAW map (Ma_12ith) shows this site to be S for stable.
The site was not excavated; a cut less than four feet high is at the west side of the pad. It is below an old
road and is vegetated, so it is not recent. No native vegetation outside of grass will be disturbed by construction.
OBSERVATIONS
Observation of the site is in accordance with the original slope assessment of 2010. Satellite images
from Google Maps show the garage site to have been a flat terrace with grass and scrub. The other observations
AAG15-036 8947 Buttonwood Lane NE, Olympia, WA 98516 1
Phone#: (360)481-6677 or(360)491-5155
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. and conclusions are validated by this review. The distance of the garage from the original location in no way
invalidates the observations and reasoning of the original assessment.
CONCLUSIONS AND RECOMMENDATIONS
As the original assessment appears valid and nothing other than gravel placement has been done, the pad
and building site should be accepted for the stated purpose of a pole-type garage on a concrete slab. As there is
to be no plumbing,the only concern is drainage, and that is addressed by the Site Plan from Town and Country.
It is recommended the project proceed as proposed.
LIMITATIONS
This letter is for the exclusive use of Lynette Payson and her authorized agents. This is not a full
Geotechnical Report or Geologic Assessment of the residential property. Within the limitations of scope,
schedule and budget, our services have been executed in accordance with generally accepted practices in the
field of engineering geology in this area at the time this report was prepared. No warranty or other conditions,
expressed or implied, should be understood.
We appreciate this opportunity to be of service to you and we look forward to working with you in the
future. If you have any questions concerning the above items, the procedures used, or if we can be of any
further assistance please call Curtis D Cushman at the phone numbers listed below.
ALL AMERICAN GEOTECHNICAL
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Curtis D Cushman, L.G., L.E.G.
Senior Engineering Geologist
Owner
AAG]5-036 8947 Buttonwood Lane NE, Olympia, WA 98516 2
Phone 4: (360)481-6677 or(360)491-5155