Review_Comments_ENG3.pdf
City of EdmondsBLD20110003
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX(425)771-0221
Website: www.ci.edmonds.wa.us
PUBLIC WORKS DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
PermitApplication:Date:
#BLD201100033/18/11
th
Project Name/Address:
Zahnow –8216-211Pl SW
Contact Person/Address, Fax or E-mail:
James & Linda Zahnow –jameszahnow@comcast.net
Reviewer: JENNIFER LAMBERTDivision:
ENGINEERING
During review of the subject submittal, it was found that the following information, corrections, or
clarifications would need to be addressed. All Handouts referred to in these comments can be accessed at
our website: www.ci.edmonds.wa.usunder City Government / Development Services Department /
Engineering Division then scroll down to Handouts:
st
1Review –1/18/11
nd
2Reivew –2/25/11
rd
3Review –3/18/11
1)OK
2)OK
3)OK
4)OK
5)2/25/11 –Comment was partially addressed. A drywell was placed on the plans and
manufacture specifications were provided; however, it is unclear as to what size system you are
intending to install.
a.Please submita geotechnical report withpercolation/ infiltrationratesper Appendix C
of the Stormwater Supplement, so that thesizing of thedrywell system can be verified.
b.If a raingarden is installed there is a methodprovided in the Rain Garden Handbook
for Western Washington Homeowners where the percolationrates may be obtained
without the use of a geotechnical engineer. The percolation rates determined for the
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City of EdmondsBLD20110003
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX(425)771-0221
Website: www.ci.edmonds.wa.us
PUBLIC WORKS DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
raingarden from this handbook can not be used in the sizing of the drywell. If you
would like to install a raingarden you maydesign the system per the Rain Garden
Handbook for Western Washington Homeowners.
http://mason.wsu.edu/WaterQual/documents/Raingarden_handbook.pdf
i.Please show on the plans that all requirements per the handbook have been met.
ii.Please also provide the worksheet from the handbook.
c.Splash blocks may be approved if there is a vegetated path in which the water will be
directed. The vegetated path must be a minimum of 50’. If you propose to use this
method please show that a minimum of 50’ may be obtained.
2/25/11 –Comment was not addressed.
1/18/11 Comment: From the letter provided, a variance from the stormwater requirements was
requested. Unfortunately a variance can not be granted. The letter indicates astormwater system
was installed on the property at the time thesingle family was constructed. This existing system
would need to either be modified to handle the additional impervious surface water runoff or a new
system would need to be installed.
d.If it is proposed to modify the existing system, please provide engineering calculations
showing either that the existing system can handle the additional surface water runoff or
showing what is needed to modify the existing system to handle the additional water.
e.If a new system is proposed that is designed for stormwater runoff to infiltrate(i.e.
raingarden, spreader trench, drywell)into the ground a geotechnical report with percolation
rates, mayberequired. Please provide the necessary information to the City to adequately
review the proposed system.
6)OK
3/18/11 –The dye test performed on site shows that there is a rock path in which the
7)
downspouts drain to.
Please show the rock path on the property (i.e. adjacent to the driveways, along the
a.
curb, etc.)
Please show with directional arrows where the drainage from the downspouts go.
b.
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City of EdmondsBLD20110003
TH
121 5AVENUE NORTHEDMONDS, WA 98020 • (425) 771-0220 FAX(425)771-0221
Website: www.ci.edmonds.wa.us
PUBLIC WORKS DEPARTMENT
Planning • Building • Engineering
Engineering Plan Review Comments
2/25/11 –Comment was partiallyaddressed. You state there is an integrated curb/gutter system.
Can you please clarify what that means. Also, the footing drain connection is shown, but not the
downspouts. Please show where the downspouts are connected.
1/18/11 Comment: Please show the location of the existing storm system and its point ofconnection
to the city storm system.
8)OK
9)OK
10)OK
Please resubmit 3 copies of the revised sitedrawings and associated documents with a written response to
each item to an Engineering Technician. Please contact me at 425-771-0220ext 1321or by e-mail at
jennifer.lambert@ci.edmonds.wa.usif you have specific questions regarding these plan corrections.
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