bld20140522_Mcgillivray-Addition #4.pdf
City of Edmonds
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121 5AVENUE NORTH •EDMONDS, WA 98020 • (425) 771-0220 FAX(425) 771-0221
Website: www.edmondswa.gov/
DEVELOPMENT SERVICES DEPARTMENT
Planning • Building • Engineering
Plan Review Comments
Plan Check :Date:
#BLD20140522November24, 2014
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Project Name/Address:
McGillivray Addition–20508 85Pl. W.
Contact Person/Address/Fax:
Terry Willeyawhomes@comcast.net
Reviewer:Chris RiveraDivision:Engineering
During review of the subject submittal,it was found that the following information, corrections, or
clarifications wouldneed to be addressed. All Handouts referred to in these comments can be accessed at
our website: www.edmondswa.gov/under City Government / Development Services Department /
Engineering Division then scroll down to Handouts:
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1Review –June 26, 2014
nd
Review –August 28, 2014
2
rd
Review –October 15, 2014
3
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Review –November 24, 2014
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1)August 28-Ok
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2)August 28-Ok
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3)August 28-Ok
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4)August 28-Ok
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5)October 15–Ok
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6)October 15–Ok
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7)June 26-Ok
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August 28–Submitted site plan is not consistentwith the submitted Detention System Design Exhibit
within the Detention System Sizing Report provided by Donna L. Breske PE.
-The existing detention system was sized using theoldCity of Edmonds sizing chart, which required 56’ of
18” diameter pipe for an impervious area of 4000 sf (see attached outdated chart) this met impervious
surfaces constructed in 2003 of 3950 sf.
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October 15–The above comments need to be addressed. Please make certainthe reportand the site plan is
consistent, reflecting an existing detention system of 56’ in lengthwith18” diameter pipe. Please make
certain the Detention System Sizing Report Exhibit and site plan are consistentin showing the existing
detention system as well as the proposed.
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November 24–Noted,the existing detention system is 60’long, though the above comments not only
were intended to address the difference in detention sizing, they were to get a consistentproposed
detention system shown on both the Site Plan and within the Detention System Sizing Report
(Appendix A). There are inconsistencesbetween the two plansfor what is proposed.
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a.Detention System Sizing Report(Appendix A)-The detention system shownwithin the
Sizing Report is acorrect way of installation.
It shows aproposeddetention system tying into the existing detention system by
way of catch basin, not affectingthe existing system.
The catch basinin line with the proposed system allows for cleaning of the proposed
system.
Again, this is correct,if you chose to install according to the System Sizing Report,please
make sure the submitted Site Plan reflects this proposal.
b.Site Plan -The site plan proposes twonew detention systems side by side and connecting to
the existing detention system at two locations(not atthe catch basin).
The proposed system should not interferewith the existing systemand should not
reduce its retention.
You will need to provide detail as to how you intend to connect the proposed with
the existing detention system. This shallbe by way of catch basinor prefabricated
joints.
Please also show the location of risers and cleanouts onthe proposed detention
system.
If you intend to install accordingto this proposed system please make sure the Detention
System Sizing Report is updated to reflect the Site Plan.
(Please see attached Site Plan & Detention System Sizing Report comparison.)
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8)October 15–Please provide on the site plans, the rim and invert elevations for the proposed risers and
existing catch basins.
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November 24–Though rim & invert elevations have been provided forexisting catch basins, it is not
clearas to where and what these elevation are,
can you please identify what is entering and exitingtheexisting catch basins.
Also, please provide rim and invert elevations for proposed catch basinsandrisers.
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OK
9)October 15–
Please resubmit 3 copies of the revised plans/documents to a Development Services Coordinator.
Please contact me at 425-771-0220 if you have specific questions regarding these plan corrections.
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