HomeMy WebLinkAboutBLD2007-00430 Geotechnical Report 06/02/2008 09:34 2067809438 ASPECT CONSULTING PAGE 02/03
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Aspect consulting
earth+water
June 2,2008
Allan and Nancy Vance
do Mary Miller, Project Manager
2250 Ash Street .
Port Townsend, Washington 98368
Subject: Geotechnical Review of Constructed Site
512 Malamute Lane
Port Townsend, Washington
Project No. 070066-001-01
Reference: Geotechnical Review of Site Plans,letter report,
dated March 30,2007 by Aspect Consulting,LLC
Dear Mr. and Ms. Vance:
. This letter is in response to the request from Jim Rozanski,project architect,.to complete Items .
31 and 32 of tine building permit requirements from Jefferson County Department of Develop-
ment to review site construction for geotechnical compliance for Case# BLD07-00050, site
address 512 Malamute Lane,Port Townsend, Washington.
The two items which are being responded to axe as follows:
Item 32 - Prior to final building occupancy, proponent shall submit a written
letter'rom John Peterson,P.E.,of Aspect Consulting stating that the
stormwater facility has been constructed in accordance with the requirements
of the"drainage facility"plan prepared by Jim Rozanski.
Item 33-Prior to final building occupancy,proponent shall submit a written
letter from either Aspect Consulting or Shannon and Wilson stating that the
structure has been constructed in conformance with the requirements of the
geotechnical report. The letter shall be wet-stamped by the licensed
geologist/engineer.
Aspect Consulting was never requested to observe the site during construction and was
therefore limited to review of photograph documentation and visual review of the current site
features.Aspect Consulting staff visited the site on May 29,2008 to review the overall
construction and the final stormwater facility.Prior to the site observation,the construction
photo documentation was reviewed with Mary Miller.
In response to Item 32 above,Aspect Consulting states that the drainage facility was
substantially constructed in accordance with the plan prepared by Jim Rozanski. An as-built
drawing was given to Aspect Consulting which conformed with our observed field
observations.Minor location changes and downslope combination of piping were noted in our
observations,with delivery of stormwater to the appropriate locations based on the outlets
which were identified.The intended function of the drainage facility has been met.The gravel
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179 Madrone Line North 13ainbndye island,WA 93110 Ted(206)780-9370 Fax. (206)780-9438 www.3spectconsulting.corn
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06/02/2008 09:34 2067809438 ASPECT CONSULTING PAGE 03/03
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Allan and Nancy Vance
c/o Mary Miller,Project Manager
June 2,2008 Project No. 070066-001-01
in one outfall defector area had yet to be placed and we were informed by Mr. Miller that it is
being done in the near future before occupancy.
In response to Item 33 above,Aspect Consulting has reviewed the original Shannon and
Wilson report and find only two recommendations which directly relate to the construction of
the structure.These are follows:
1. The footings should be founded on dense till or residual sandstone found at depths of 1
to 3 feet.
2. Drainage should be provided around the perimeter of the footings and roof drains
should not be connected to the footing drains.
The photo documentation of the basement excavation appeared to show the bearing depth was
much deeper than the minimum required in the report.Also,not only was the footing drain
installation shown in the photo documentation but additional subsurface drainage was also
installed. Some of these outlet drains were observed to be weeping small volumes of water
even though ro significant precipitation had occurred recently.Aspect Consulting concludes
. that these footing systems are functional.
Based on the above limited observations,Aspect Consulting believes the geotechnical
construction equirements of the Shannon and Wilson report were met by the project and
observed no evidence to the contrary.
We hope this will aid in completing your project permitting requirements, and if we can be of
further service,please call me at(206)780-7720.
Sincerely,
Aspect consulting, LLC
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!EXPIRES 6/22// 1
John L. Peterson,PE
Associate Geotechnieal Engineer
jpeterson@aspectconsulting.com
cc: Jim R•zanski,Rozanslci Architects
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