ENGINEERING1_BLD20180413_19824 86th PL W.pdfof EDo CITY OF EDMONDS
PLAN REVIEW COMMENTS
., ENGINEERING DIVISION
s9° (425) 771-0220
City Website: www.edmondswa.gov
DATE: May 18, 2018
TO: Almark Corporation
Almark—Corporation@frontier.com
FROM: Mitch Boyd, Stantec Consulting Services
Mitch.Boyd@edmondswa.gov
RE: Application 4: BLD20180413
Project: Almark Lot 2 - Single Family Residence
Project Address: 19824 861h Pl W
During review of the above noted application, it was found that the following information,
corrections, or clarifications are needed. Please submit revised plans/documents including a written
response to each item below.
Resubmittals can be made at the Development Services Department on the 2nd floor of City Hall.
Permit Center hours are M, T, Th & F from 8am-4:30pm and on Wednesdays from 8:30am-noon.
City of Edmonds handouts, standard details, application and other forms, and development code
may be referenced on the City website: www.edmondswa.gov under Services/Permits and
Development.
GENERAL
1) Submit ROW Permit Application form
2) A Stormwater Covenant is required to be recorded against the property based on the
proposed stormwater facilities for the project. Please complete the covenant, including
notarization and any required exhibits and submit to the city. Ensure the stormwater
covenant meets Snohomish County Record Drawing requirements. The document must be
complete, but will not be recorded prior to permit issuance. Prior to construction, final
location of facilities are to be verified (by field inspection and asbuilt) and then the covenant
will be recorded.
3) Show all private easement information within the plan sets. Note AFN's for existing
easements and/or recording documents for proposed easements as applicable.
4) A 10' public sewer easement is required in the southeast corner of the property as the public
sewer main crosses on to private property. Please complete the attached easement
documentation.
5) Utility patches shall be combined and full width or half width overlay will be required
depending on the extent of disturbance. Where utility patches fall entirely within one travel
lane, the overlay shall extend to the centerline of roadway. Where utility patches extend into
both travel lanes then a full width overlay is required.
TESC
6) The City of Edmonds standard details have been updated. Please visit the City of Edmonds
website and replace the old TESC standard details with the new TESC standard details.
WATER
7) As indicated by the Fire Department, a fire sprinkler system is required for this property.
Please revise plans to include the following:
a. Please add a note that a 1" meter is to be installed
b. Please show a 1-1/2" water service line to be installed from the back of the meter to
the house (as required for a combination fire and domestic service).
c. Please label the pipe material and note tracer wire to be installed on the water service
line.
8) Show that there is a minimum of 3' of horizontal separation between the water service and
dry utilities (i.e. power, phone, gas, cable, etc.). Currently the power is too close to the
proposed water service line.
9) Add a note to the plans indicating where the landscape irrigation backflow assembly will be
located (if one is proposed).
10) Please add a note to the plans that all final restoration shall be completed by the contractor
not the City of Edmonds.
SEWER
11) The sewer lateral from the main to the property line shall be 6". Once on private property
the sewer may reduce to 4". Please add a note that clarifies a 6" sewer line is required
between the 6" cleanout and the sewer main.
12) Add a note at the sewer service and storm drain crossing that the minimum vertical
clearance between the two utilities is 18".
13) If a new sewer lateral is proposed and the connection will be core drilled, show the
connection at the sewer main per City standards and with a Romac Inserta-tee. If the sewer
connection will be cut in, please show a wye to be installed.
STORM
14) Please add a note to protect the existing thickened edge along the right-of-way where the
proposed driveway is to be installed. It is unclear if water from the roadway is tributary to
the infiltration system. Per the stormwater report, no stormwater from the roadway should be
tributary to the infiltration system.
STORMWATER ENGINEER REVIEW
Refer to attached plan review comments by City Stormwater Engineer, Zachary Richardson.
Please contact Zack directly at 425-771-0220 or by email at
zachary.richardson(a edmondswa.gov with any specific questions you may have regarding his
comments.
1) The following language is to be included with all permit reviews where the Supreme Court
ruling on stormwater vesting comes into play.
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The Supreme Court of Washington issued a ruling on December 29, 2016 regarding the "vesting" of
Stormwater regulations. This ruling upholds the Department of Ecology's regulations for application and
construction dates for projects with Stormwater requirements.
The City of Edmonds has received clarification from the Department of Ecology on what this ruling means for
development applications submitted prior to local stormwater codes being adopted. The stormwater codes in
effect at the time the application for a plat/subdivision is submitted apply to all subsequent building permits if
stormwater is being addressed at the subdivision/plat level. If the subdivision included restrictions or
requirements for the individual lots, (e.g. maximum impervious surface, LID BMP's), those requirements
should be recorded for each lot and must be enforced when the individual lot is developed.
Under the municipal stormwater permits the only place that the recent supreme court decision comes into play
is if the developer does not start construction on the plat/subdivision until after January 1, 2022.
For the purposes of the municipal stormwater permits both "application " and "start construction " are defined
in the permits.
Application means at a minimum, a complete project description, site plan, and if applicable SEPA checklist.
Start of construction means at a minimum, the site work associated with and directly related to the approved
project has begun. For example: grading the project site to final grade or utility installation.
Language shall be included on the face of the recording documents for the plat/subdivision that states the
stormwater codes in effect at the time of application for the plat/subdivision shall apply, as long as
construction on the plat/subdivision starts prior to January 1, 2022. If construction does not begin prior to
this date, the stormwater system for the plat/subdivision shall be redesigned to comply with current codes.
2) On January 1, 2017, the City of Edmonds adopted the Department of Ecology 2012(14)
Stormwater Mitigation Manual for Western Washington (SWMMWW). Stormwater design
submittals shall be consistent with the SWMMWW, as modified by the Edmonds
Community Development Code (ECDC) 18.30 and the 2017 Edmonds Stormwater
Addendum. Links to documents and code are available on the City website. Please include
the applicable checklists with your resubmittal.
a. For new SFR projects connecting to a stormwater system approved with a
subdivision approved prior to 2017, the SFR may connect to the system constructed
with the subdivision as long as the proposed impervious surface area does not exceed
that for which the system was designed. If it exceeds the allotted impervious surface
area it shall be designed to the code effective at the time of SFR permit application.
b. SFR permits where the subdivision approved prior to 2017 states the stormwater
system improvements are deferred to the building permit, will be required to meet
the code in effect at the time of building permit submittal.
3) The proposed project site includes existing impervious surface area. If a stormwater
management system was installed to mitigate the existing impervious surface area, please
provide the design information for the system and show it on the proposed plans. If an
existing stormwater management system does not exist for the existing impervious surface
area, the 2017 stormwater code requires that mitigation of 25% of the existing impervious
surface be included in the proposed stormwater design. Please review ECDC
18.30.060.D.5.b.i regarding the applicability and requirements for the Retrofit bmp.
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STO RM WATE R REVIEW COMMENTS
City of Edmonds
Engineering Division
. jn
To: Engineering Reviewer
Date: May 14, 2018
Project Name: Almark SP Lot 2
Permit Number: BLD20180413
Address: 19824 86t" PI W
Review Type: Building (SFR)
Submittal Date: 3/22/2018
Reviewer: Zack Richardson, PE
City of Edmonds, Stormwater Engineer
Recommendation: Additional detail is needed. I recommend that BLD20180413 be
withheld until the comments below are adequately addressed.
Review Comments:
1. General: A drainage easement, as shown along the west property line, will be
required prior to occupancy. Submit a copy of the easement with future submittal
for engineering review prior to recording.
2. C3: Provide additional clarification on plans to how runoff will flow or be
controlled along at the west end of the frontage improvements:
a. It appears the thickened edge will direct runoff around CB #5 where it
would have previously entered at the inlet; revise plans to capture flow line
runoff and/or address potential increases in flow along the downstream
portion of road.
b. Clarify if road super elevates around the bend and provide additional
typical sections or grading/transition information as needed.
c. If not super elevated, address why a thickened edge or extruded curb was
abandoned west of CB #5, address concerns for erosion at pavement
edge, and ensure runoff will continue to flow as existing condition.
3. C3: It is not clear that the construction of the CB #2 is feasible as porposed;
updated plans, and/or provide written response, as needed to address:
a. Center of CB appears —2' from adjacent storm pipe line work; with real
dimensions of pipe and basin considered, it does not appear there is
sufficient space to construct the CB as proposed.
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b. Reviewer believes storm configuration can be adjusted to reduce the
number of CBs required in the public right-of-way and warrants additional
attention to minimize public service needs created; can connection be
reconfigured so that the pipe from CB #2 and CB #5 connect at a single
junction within the flow line (possibly requiring revision to the CB #5
connection point)?
i. If feasible, CB #3 may only be needed as an angle point for the
private system and should be relocated onto private property in
such a case.
4. C3: Survey linework reflects an apparent rockery or wall immediately adjacent to
the inletting pipe of CB #5 and that installation of said pipe could impact the wall
or the wall could bare partial on the pipe; update plans, and/or provide written
response, as needed to identify and address concern.
5. C3: It appears the new pipe inletting CB #5 has less than 2' of cover under
roadway; revise to ductile iron piping and update callouts/notes as needed.
6. C3: It appears there may be an error in rim callouts and/or grading; the elevation
difference between CB #2 & CB #4 appears to create a slope well above 14%
when adjacent contours appear to be half that value; update, adjust, or provide
written response as needed.
7. C3: CB #8 outlet to the west appears to be lower than the top of rock for the
trenches (ie. overflow elevation); adjust invert or add riser as needed to ensure
all components of the system will retaining runoff to the top of trench elevation
before flowing to the public system.
8. C3: Identify areas to be treated per BMP T5.13 (amended soils) and provide
enough detail/specification for contractor to satisfy BMP requirement.
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