REFERENCE - STORM SYSTEM FOR NORTH PROPERTY WHERE THIS PROPERTY TIES INDEFERRED STORMWATER SUBMITTAL
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FORSTORMSYSTEM INVESTIGATION, ec�
(CONSULTING REPAIR AND ASBUILT AS REQUIRED BY
p PERMIT #BLD2023-1060.
DAILY
350 Madison Avenue North
Bainbridge Island, Washington 98110
/W_93 /U
DATE: FRI 11/14/2023
WEATHER: Sunny, 40s
PROJECT NO.: 220625
BUILDING PERMIT NO.: MUNICIPALITY:
BLD2023-1060 Edmonds, WA
TO: Sean Niesel
18500 Olympic View Drive
Edmonds, WA 98020
ATTN: City of Edmonds: Jeff Whatmore, Eric Carter,
Les Krestel
EQUIPMENT USED: Komatsu LC138 excavator
BLD2023-1060 RECEIVED
ENGINEERING DIVISION Mar 11 2024
APPROVED AS NOTED CITYOFEDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
v��3/12/2024
T #11
710 2nd Avenue, Suite 550
Seattle, Washington 98104
32?5- /44J
PROJECT NAME: Niesel Residence Slope Stabilization
PROJECT LOCATION:
18500 Olympic View Drive
Seattle, WA 98109
ENGINEER: Aspect Consulting, LLC.
SHORING CONTRACTOR: McDowell Northwest, Inc.
EARTHWORK CONTRACTOR: On Track Excavation, LLC.
GENERAL CONTRACTOR: On Track Excavation, LLC.
ATTACHMENTS: Figure 1 — Shoring Installation Progress (Shoring installation complete — omitted)
Table 1 — Soldier Pile Installation Summary (Soldier pile install complete — omitted)
THE FOLLOWING WAS NOTED:
Matthew von der Abe of Aspect Consulting (Aspect) was on -site to view construction of
replacement stormwater system at 18500 Olympic View Drive (Site).
The stormwater system was outside of our design and inspection scope. However, implementation of
permanent stormwater management infrastructure is essential for ongoing slope stability and
therefore is an essential part of the overall project.
1. Erosion Control - Temporary
OnTrack has placed and staked jute net over exposed soil surfaces at the Site. The jute net appears to
be in good condition and performing as intended. OnTrack has also placed and staked straw wattles
on the slope downhill (west) of the shoring wall. The previously installed silt fence near the base of
the slope at the Site is intact and performing as intended. The jute was peeled back to allow
trenching for laying of pipe, then restored after trenches were backfilled and construction was
complete.
COPIES TO: COE, On Track
FIELD REP: Matthew von der Ahe, CESCL, LEG, Project Geologist
SIGNED:
Page 1 of 3
SANiesel Property Geotech Services 220625\Constructio4ield
GEOTECHNICAL REVIEW Matthew von der Ahe, LEG, Project
Geologist
SIGNED:
Re ortsV023.11.14 FR11.docx
This report presents opinions formed as a result of our observation of activities relating to our services only. We rely on the contractor to comply with
the plans and specification throughout the duration of the project irrespective of the presence of our representative. Our work does not include
supervision or direction of the work of others. Our firm will not be responsible for job or site safety of others on this project. DISCLAIMER: Any
electronic form, facsimile or hard copy of the original document (email, text, table, and/or figure), if provided, and any attachments are only a copy of
the original document. The original document is stored by Aspect Consulting, LLC and will serve as the official document of record.
%Aspect
4CONSULTING
PROJECT NO.: 220625 PROJECT NAME: Niesel Residence Slope Stabilization DATE: 11/14/2023
We observed no sediment track -out on the driveway or ROW surfaces outside of the Site boundaries.
We observed a moderate amount of debris on the slope surface below the residence, but all fully
within the parcel boundary.
In our opinion, temporary erosion control measures have been implemented in general accordance
with the Project plans and are functioning appropriately at the Site.
2. Shoring Installation and Monitoring
Shoring installation is complete as of 10.18.23 (FR07).
3. Subsurface Drainage Placement
Storm water drainage piping was installed today. See Figure 1.
• A new stormwater conveyance line was installed from northeast corner of house, wrapping
around the north and west side of house. The new stormwater line discharges to the existing
catch basin near southwest corner of house.
• Downspouts on north and west side of house were tightlined to the new stormwater
conveyance line.
• All new pipe was 4-inch SDR35, buried at least 18 inches, and embedded in washed 5/8 inch
rock
• Catch basins were installed at each angle of the new conveyance pipe line.
• A catch basin was also installed just south and downhill from the rebuilt deck.
• From the existing catch basin near the southwest corner of the house, buried, rigid 4-inch
PVC pipe runs parallel to the stairs %-way down the slope to a cleanout port. Downstream
from the cleanout, 4-inch flexible polyethylene pipe runs toward the bottom of slope. Others
report that the 4-inch flexible pipe discharges at the base of the slope onto a quarry-spall
splash pad.
• The system was tested by flowing water from a garden hose into each inlet and observing the
outfall. No leaks or "bellies" were found in the pipe line.
• The stormwater system on the east and south side of the house was not altered as it was
outside our construction area. It ties into the system %2-way down the slope near the clean out
there. It appears to be functional and intact.
Other Site Activities
No new cracks were observed in the Niesel residence driveway.
Closing:
In our opinion, the construction activities observed today will contribute to the stability of the slope
at the Site.
Page 2 of 3
%Aspect
4 CONSULTING
PROJECT NO.: 220625 PROJECT NAME: Niesel Residence Slope Stabilization DATE: 11/14/2023
Photo Log:
Photo 1: Stormwater line installed on west side of house.
Photo 2: Catch basin, downspout tightline, and storm water pipeline on north side of house.
Page 3 of 3
Legend
/ New 4-inch SDR 35 drainpipe
New 12-inch catch basin
/ Existing 4-inch drainpipe
0 Existing 12-inch catch basin
C Existing downspout
OExisting cleanout
' Existing outfall with quarry spalls
Construction notes
All new pipe is buried>! 18 inches and embedded in washed 5/8-inch rock
All pipejoints are glued
System tested —no leaks or bellies detected
Locations of all features are approximate
Figure 1
Field Report #11
PermitBLD2023-1060
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