20151110113737.pdfM Engineering
Mike Clugston and Jenifer Lambert
City of Edmonds Development Services Department
1215th Avenue North
Edmonds, WA 98020
RE: 18320 Sunset Way (Murata SP Lot 3)
Plan Check #BLD20151040
Plan Review Comment Response
RAM Job No. 15-025
Ms. Lambert and Mr. Clugston;
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November 5, 2015
This letter outlines the revisions and corrections made per your plan review comments dated September 18, 2015
(via email) and October 23. Below is a list of the comment response documents addressing your comments and
requests:
Planning Comments:
1) The site plan shows a concrete patio off north but the building plans show a deck off the north and a
concrete patio off the west. Please verify and revise the site plan and building plans as appropriate.
The site plan and building plans have been revised to match both the concrete patio and deck off the
north side of the building.
2) If there is a deck off the north, please update the structural lot coverage calculations on the site plan to
include the extra area.
The site plan lot coverage calculations have been revised to include an upper level deck off the north side
of the building; see Sht. 1 of 2.
Engineering Comments:
***The building permit for the single family residence cannot be issued until the proposed impervious
area is consistent with the allowable impervious area as shown on the recorded short plat document. ***
Okay; a revision to the recorded short plat documents are being processed.
GENERAL
1) Revise the plans to be consistent with the asbuiit draNvinos for the short plat.
A revision of the allowable impervious areas on the recorded Murata short plat documents and a revision
to the native vegetation plan are being processed to match the proposed site development plan. The
existing utilities shown on the site development plan are to the best of our knowledge the correct existing
locations.
EROSION CONTROL
1) Show all trees on the plans.
Existing trees have been added to the plans; see Sht. 1 of 2.
2) Show tree protection at the drip line of the trees.
Tree protection orange filter fabric fence, clearing limits, and tree protection measure notes have been
added; see Sht. 1 of 2.
RAM Engineering 1653113`' Ave W, SuiteA108 Lynnwood WA 98037 (425)678-6960 RAMenginerringinc.com
18320 Sunset Way (Murata SP Lot 3) Page 2 of 4
Plan Check #BLD20151040
Plan Review Comment Response
RAM Job No. 15-025
STORM
1) Impervious surface calculations — Lot 3 is allotted 4924sgft, which includes the access road. Please
break out the impervious surfaces such that the calculations show the square footage of the access road
and the impervious areas that are going to the detention system and the square footage of the impervious
area going to the infiltration system.
A breakdown of the impervious surfaces allocated to the storm detention tank system and the infiltration
system has been added to the plans; see Sht. 1 of 2.
2) Protide documentation from the Engineer or Geotechnical Engineer that states that the overflowfrom
the trench will not cause flooding or erosion problems for the downstream properties.
See attached engineering memo addressing the infiltration overflow system.
3) Clearly show which portions of the house (roof line) will discharge to the detention system and which
will discharge to the infiltration system. I understand that it is shown on the plans, but I would like it
clearly labeled so there is no confitsion when inspected.
A delineation of the house roof areas to discharge to the infiltration trench and to the detention tank
system have been clearly labeled on the plans; see Sht. 1 of 2.
4) Show the observation well for the infiltration system.
An observation well for the infiltration system has been added; see Sht. 1 of 2,
5) The plans show a storm stub through the driveway, but not connected to anything. Please show where
the pipe will connect, if existing and not to be used, show the line cut and capped, or remove if added in
error.
Existing storm stub will not be used and will be removed. Notes to cut and capped existing storm line
have been added to the plans; see Sht. 1 of 2.
6) Show the invert elevations for the storm stub.
Storm invert elevations for the storm stub has been added; see Sht. 1 of 2.
7) Show the invert elevations at the house so that pipe slope and coverage can be verified. The pipe must
have a minimum of 2' of cover under a driving surface.
Storm invert elevations at the house has been added; see Sht. 1 of 2.
NVATER
1) It appears that afire sprinkler system is required for this property.
a. Please add a note that a 1" meter is to be installed or has been installed.
Existing 1" water meter call -out added; see Sht. 1 of 2.
b. Please show a 1-1I2" line to be installed or note that it has been installed (as required for a
combination fire and domestic service line). From my understanding there are times when the
fire sprinkler designer may design a system that allows for a 1" line. Each system will be
reviewed for approval from the Fire District. If approved engineering would be OK with a 1"
setl�ice.
Existing 1-'/z" water service line call -out added; see Sht. 1 of 2.
c. Please label the pipe material and note tracer wire to be installed on the water service line.
Water pipe with tracer wire call -out has been added, 1- %" PE (200 PSI); see Sht. 1 of 2.
RAM Engineering 1653113"' Ave W, Suite A108 Lynnwood WA 98037 (425)678-6960 RAMenginerringinc.com
18320 Sunset Way (Murata SP Lot 3)
Plan Check #BLD20151040
Plan Review Comment Response
RAM Job No. 15-025
1) No Conunents
DRY UTIIdTIES
1) No Comments
Page 3 of 4
If there are any questions regarding the items above or the contents of the revised drawings please contact me at
your earliest convenience; I can be reached at (425)678-6960 or RobL@RAMengineeringinc.com. We sincerely
appreciate your time and assistance.
Thank you,
Rob Long, PE
Principal
cc: Kayla Clark, c/o Select Homes, Inc.
RAM EnNNrf4°: e r( rig 1.653113"' Ave W, Suite A1.08 II-Vniniwntocvd tflia 98037 (425" 678-6960 RAItdpemE:inerilrbk?,Ilrua.xlorIU