ENGINEERING RESPONSE 1.pdfRAM Engineering
City of Edmonds Development Services Department
121 5th Avenue North
Edmonds, WA 98020
RE: Select Homes Inc., 7919 203`d St SW
Plan Check BLD20171659
1st Review Comment Response
RAM Job No. 17-034
City Staff:
RESUB
FEB 2 8 2018
BUILDING DEPARTMENT
CITY OF EDMONDS
February 27, 2018
SCAN °ALL
This letter outlines the revisions and corrections made per the review comments dated January 5, 2018.
Below is a list of the comment response documents addressing the comments and requests:
Engineering Comments, Mitch Boyd January 5, 2018:
GENERAL
1) Submit ROXV Permit Application form
Response: ROW permit will be processed under separate cover.
2) Submit Side Sewer Permit Application form
Response: Side sewer permit will be processed under separate cover.
3) A Stonnwater Covenant is required to be recorded against the property based on the
proposed stortmwater facilities for the proiect. Please complete the covenant, inchiding
notarization and any required exhibits and submit to the city. 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.
Response: See attached Stormwater Covenant.
SITE DEVELOPMENT P1,AN
4) Please include the permit number BLD20171659.
Response: Permit number has been revised on all sheets.
5) Consistent with Edmonds Community Development Code 18.80.060, driveway slopes shall
not exceed 14% slope. Please indicate this requirement on the plans.
Response: Maximum driveway slope of 14% has been added to sheet 1.
6) Please label the driveway as asphalt from the edge of existing asphalt to 20 feet from the
edge of existing asphalt.
Response: Asphalt and concrete driveway combined for a total of 20 ft and meets City code
requirements.
7) 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.
Response: Okay, additional overlay is not anticipated for the project.
8) Please show the existing sewer connection.
Response: Sewer connection shown on sheet 1.
RAM Engineering 1653113th Ave W, Suite A108 Lynnwood WA 98037 (425) 678-6960 RAM engineeringinc.com
Select Homes Inc., 7919 203rd St SW
Plan Check BLD20171659
1st Review Comment Response
RAM Job No. 17-034
9) Label pipe material and size. The sewer lateral from the main to the property line shall be
6". Once on private property the sewer may reduce to 4".
Response: Sewer pipe material and size is shown on sheet 1.
10) If the existing side sewer is to be re -used, the line must be cut and capped a minimum of 20'
from existing and/or proposed foundation whichever is closest to the property line. If the
existing side sewer is not proposed for re -use then the sewer shall be cut and capped at the
property line. Please revise the plans accordingly.
Response: Sewer connect note added to sheet 1.
11) Please show the existing sewer services for the residences at 7918, 7926, 7923, and 7929
203`d St SW.
Response: Existing sewer services along 203rd St SW added to sheet 1.
Page 2 of 4
12) Please provide the invert elevation of the footing drains at the discharge location and
surrounding the proposed residence.
Response: Additional footing drain information added to sheet 1, detail added to sheet 2.
13) The proposed location for the storm main is too close to the existing gas main and sewer
main. It is recommended that the storm main be placed near the center of the right-of-way.
Please note that due to site constraints, the project has been approved to install the storm
main within 8' (horizontally) of the sewer main.
Response: The existing gas main location was corrected to south side of existing sewer main.
The proposed location of the new storm main north of the existing sewer main has been
determined to be the best location for the new storm line. Plans have been updated showing
the existing gas line on the south side of the existing sewer main.
14) Show all dry utilities and required utility separation. Please add a note that a minimum of 3'
separation is required between the dry utilities (power, gas, phone, cable, etc.) and wet
utilities (sewer, water, and storm).
Response: Utility separation note added to sheet 1.
TES(: PLAN
15) Add a note that the stockpile is to be covered within 24 hours.
Response: Stockpile 24 hour cover note added to sheet 3.
DEMOLITION PLAN
16) Show the existing sewer connection.
Response: Sewer connection shown on demolition plan.
17) If the existing side sewer is to be re -used, the line must be cut and capped a minimum of 20'
from existing and/or proposed foundation whichever is closest to the property line. If the
existing side sewer is not proposed for re -use then the sewer shall be cut and capped at the
property line. Please revise the plans accordingly.
Response: Cut and cap, and existing sewer line removal notes have been added to the
demolition plan.
18) Add a note to the plan that the temporary erosion and sediment control from associated
building permit BLD20171659 must be installed throughout the project.
Response: Note added to demolition plan
19) Revise TESC Note I to "Temporary erosion control will be required..."
Response: Note revised to "will" on demolition plan
RAM Engineering 1653113`"Ave W,Suite A108 Lynnwood WA98037 (425)678-6960 RAMengineeringinc.com
Select Homes Inc., 7919 203rd St SW Page 3 of 4
Plan Check BLD20171659
1st Review Comment Response
RAM Job No. 17-034
Engineering Comments, Mitch Boyd November 22"d, 2017:
Review Comments:
1. Stormwater Report: It is unclear that bio-retention has been adequately
determined infeasible; qualitatively determined poor infiltration rates alone may
not be sufficient for infeasibility. Revise report to address infeasibility per the
criteria in Edmonds Addendum Appendix A (bio-retention portion attached) or
implement BMP as appropriate.
See updated geotechnical evaluation letter providing additional infeasibility determination for
LID BMPs.
2. SP-01: Update plans to add notes, line -work, hatching, and callouts as needed to
reflect impacts to, and site/pavement restoration requirements for, the right-of-
way disturbed for the storm drain extension in 203rd St SW and proposed
driveway.
a. Show any required saw cuts and trench repair limits and reference details
as needed.
Response: Saw cut and trench repair limits have been added to sheet 1.
b. It appears the edge of pavement include a thickened edge for drainage
control; ensure thickened edge is maintained in post construction
condition (at proposed driveway too).
Response: Note to resort the pavement and thickened edge for drainage control have been
added to sheet 1.
c. Identify existing improvements within the right-of-way (mail boxes, water
meters, vegetation, etc) and provide realistic direction to (1) protect, (2)
remove & replace, or (3) relocate improvements as needed.
i. Give direction as needed to ensure trees near proposed CB-1 are
not negatively impacted.
Response: Tree protection note has been added to sheet 1 and 3.
ii. It also appears there are a row of hedges along the adjacent
property which should be noted and direction provided.
Response: Hedge no longer exists.
d. Engineer shall confirm, in written response, that alignment is believed to
be constructible as shown, including excavation limits required for
installation; it is difficult from plan graphics to gauge proximity and impacts
to unscaled features (water meters, trees, etc).
Response: The proposed offsite storm alignment was reviewed and assessed with the
applicant's contractor. The proposed alignment was determined to be the best option. This
signed letter and design plans confirms the design constructability given the available
information. A note to verify and maintain existing utilities has been added to sheet 1.
3. SP-01: Reviewer could not located footing drain recommendation in geotech
report; update plans or report as needed to clarify recommendation location
and/or remove reference to geotechnical recommendation.
Response: Geotechnical reference removed from footing drain drywell.
RAM Engineering 1653113`hAve W,Suite A108 Lynnwood WA 98037 (425)678-6960 RAMengineeringinc.com
Select Homes Inc., 7919 203rd St SW
Plan Check BLD20171659
1st Review Comment Response
RAM Job No. 17-034
4. SP-01: Include detail for construction of the footing drain drywell trench, including
depth of trench information; ensure trench is constructed to achieve positive flow
from anticipated footing drain elevations.
Response: Detail of foot drain drywell added to sheet 2.
5. SP-01: Add a note/callout (and details as needed) to reflect the amended soils
requirement for all disturbed pervious surfaces per BMP T5.13.
Response: Soil amendment notes and requirements added to sheet 1 and 3.
Page 4 of 4
If there are any questions regarding the items above, please contact me at your earliest convenience; I
can be reached at (425)678-6960 or RobL@RAMengineeringinc.com.
Thank you,
Rob Long, PE
Principal
RAM Engineering 1653113`hAve W,Suite A108 Lynnwood WA 98037 (425)678-6960 RAMengineeringinc.com