20160817163351.pdf°wfroT f.,J,,awnz
1020 Bell St Edmonds, WA 98020
(425) 478-6057rurv� �� II ��u�llwii a u rr.up.
August 5, 2016
Linda Thornquist
Senior Permit Coordinator
City of Edmonds (425) 771-0220 ext. 1336
RE: 1020 & 1024 Bell Street Engineering / Site Development Plan
Dear Linda,
�,,
Pi jF 6i G,.rgf IWJfi" 9 �°0
�y�li LLf gtiMiltl���� I��4 o4°116��gPo"ikR'����I
Please find the attached responses to our project at 1020&1024 Bell Street. This letter represents an
overview to all the feedback we received as well as a summary of the findings from the reviewers. I've
broken the letter up into 3 sections (Storm Drain / Site Plan, GeoTechnical, & Wetlands) and provided a
detailed overview of what our responses are for each. The responses in most cases have additional etters
and documentation that are included with this letter.
From the review by Jennifer Lambert both on the Site Plans and in an email shared between Jennifer and
Jerry Shuster (dated 10/23/2015), we addressed the following comments with our response:
¢;.'m7iumrmem.n t
Response
Show 2,10, & 100 Year Flood Volumes and Show
Site Plan from LSA has been updated to show a
that the Storm Drain System is sized properly
table that outlines the 2,10, & 100 year floods and
how the s stem is able to handle (Page - C3)
Need for Pipe Anchors on the slope should be
Added Pipe Anchors down the slope on Page C3
evaluated
Break out Home area impervious separate of
Updated on C3
Porches Driveway
Add Datum for Height Calc
Already exists on page C1 marked as "Bench
Mark"
Adjust Catch Basins on C3 to reduce the number
The large ends of the storm retention facility have
of CBs from 4 to 2 saving space.
solid lids and do not accept storm water. This is
by design to not allow for unfiltered run-off to
enter the storm drain system. The only change for
this request is to note that the large CBs at the end
of the retention vault are solid lids.
Include Directional Arrows on the Garage slabs to
Updated C3 to show the garage slab flow direction
show the flow into the catch basins
Side Sewer Hook up must not be below 1% slope
Updated C3 to show that the backflow preventer
with 6" pipe AND a backflow preventer should be
was added. Also call out the > 1% slope and 6"
included
diameter Side Sewer Pipe
Modify Water lines to extend from the current
Updated C3 to show the updated location of the
water main, diagonally across Bell Street to a
water lines and meters.
location on the shared property line. Meters to be
lace side by side on each corresponding lot
........
PUD should enter each home on the opposite
Updated C3 to show the updated location of the
sides. For 1024, enter on the East side and on 1020
PUD lines
enter on the West side.
Remove note about irrigation system on C1
Removed
On C3, 1020 should be marked as Parcel A and
Updated
1024 should be marked as Parcel B
Dispersion Trench on City Parks should not be
Instead of Dispersion Trench, RipRap solution was
laced within the 25% buffer zone.
leveraged, allowing location to be on slo es < 20%
Q..xoO T+ilia h n.1N.ca l I ,I k,"a h 1'ri'l:iorils and U pci a,i'to,
hi the letters from Chuck Miller, dated 2/23/2016 & 12/7/2016 Chuck asked for clarification between the
original 2005 GeoTechnical report in comparison to the slope stability report from Earth Solutions NW.
The concern from Chuck was that in a few instances the original 2005 report asked for specific items and
the follow up report from Earth Solutions NW did not mention these concerns by agreeing nor denying
their impact in the updated project.
Included are letters from Earth Solutions NW along with a letter from our excavation company American
West Coast Construction regarding our targeted plan for the project. These letters take into consideration
that we have reduced the size of the home on 1024 bell street by 7' providing a full 12' side setback. This
increase in side setback should provide us enough space between the existing home located at 1028 Bell St
and the proposed home at 1024 Bell St. Depending on soil conditions as we dig foundations, the need for
temporary shoring will not be known. Also, West Coast Constructions letter also defines how the
foundations will be built in two stages which will also reduce the possibility of temporary shoring.
Comment Response
2005 Geotechnical Report Statements: ESNW included a letter agreeing that the
measures and proposals are in agreement with the
Page 3 - Paragraph 5 "Maximum 1:1 temporary findings performed in 2005. Aside from the
cuts are recommended" updated recommendation that standard
Page 4 - Paragraph 1 "Avoid Ground Vibrations", foundations will be sufficient in -lieu of installing
"Existing Conditions should be recorded" 11 Pile Supported foundations.
Page 5 -
Section "Drilled Concrete Piers"
Page 7 -
Slabs on Grade
Page 9 -
Section "Excavation and Slopes"
Page 10
- Section "Cantilevered Soldier Piles"
Page 11
- Section "Excavation and Shoring
What was outlined in 2005 pertaining to
temporary shoring, site excavation, and safety
measures are agreed by ESNW and should be
followed during construction. Also, ESNW will
monitor the work site during construction to make
sure that the right soils are reached when
excavating, along with requiring temporary
shoring if needed.
There was concern that the dispersion trench was not located on 1020 or 1024 Bell Street, but placed on the
neighboring parcel owned by the City of Edmonds Parks and Recreation. LSA has designed an approved
system that leverages RipRap and was able to pull the drainage entirely on 1020 Bell Streets property. The
requirement is that the location of the RipRap trench
Acre Environmental has provided an updated letter addressing this change and updated the impact areas
along with adjustments to the revegetation plan.
All of the detailed information was submitted with this letter.
Warm r°a'mzrr"a&,
Arne ; Pori