BLD2023-1134_Other_08-01-2024_12_55_13_Meadowdale_Park-Welding_Inspection_Memo_2025-07-251201 3rd Avenue, Suite 2600
Seattle, Washington 98101
206.287.9130
To: Rob Marchand, Snohomish County Parks and Recreation
From: Mike Roberts, PE, CCM
cc:
Re: Evaluation of Welding at Soldier Pile Wall
Meadowdale Beach Park
kZANCHOR
QEA
July 25, 2024
This memorandum is to summarize the field welding associated with the added piece of sheet steel
for slope retention at the south end of the soldier pile wall constructed near the automatic gate that
provides access to the Meadowdale Beach Park.
At the south end of the soldier pile wall, a steel sheet has been added to retain any future sloughage
from the hillside. The plate is a 3/a" thick piece of steel having nominal dimensions of 9-feeet in
height and 6-feet in width. 4 separate pieces of a C 12x30 steel were cut to provide support of the
3/4-inch thick steel sheet.
On June 6, 2024, Mike Roberts met with representatives of Strider Construction Greyrock Drilling to
discuss the planned work. A clarification to the design, showing the dimensions for the length of the
C 12x30 steel gusset to the 3/a" steel sheet was clarified with Hansen (Engineer of Record) and
Shannon & Wilson (Geotechnical Engineer). Welding was conducted by Dave Sjogren of Greyrock
Drilling. The attached sheet shows the as -constructed end treatment. All welded areas were ground
clean and weld beads where clean and consistent, with all welds being cleaned after welding.
Inspection of the welds was visual. Mike Roberts was on site during this operation and confirmed
the layout of the gussets met the intent of the design change. A copy of the redlined design change
is attached to this report. A vertical weld was added to the design that welded the steel plate to the
steel H-pile to improve strength at the point of attachment to the H-pile.
Following the installation of the four gussets, the top of the steel H-pile was field cut to match the
concrete panel, and the steel panel was also field cut to match the height of the wall. This reduced
the overall height of the steel sheet from 9-feet to approximately 7.5-feet in height.
In my opinion, the welding is acceptable, and no additional work is needed.
J.
WAsj;�
33795
3/4" steel sheet placed at south end of soldier pile
wall, before welding
July 25, 2024
Page 2
Field measure of C 12x30 gusset steel, showing 12"
wide
Picture from behind wall, showing steel sheet and
Field measure of depth of gusset at 3.5" H-pile. No gussets installed at this time.
Cut piece of steel for gusset. Angled face to be
welded to steel sheet.
July 25, 2024
Page 3
Second gusset installed. Continuous weld along H-
pile and steel sheet.
Bottom side of gusset, showing surface prep and Top side of gusset, showing continuous weld and
continuous weld. surface prep.
Weld along top of gusset along the steel sheet, at
bottom gusset
r _
July 25, 2024
Page 4
'...A
Weld along top of gusset along steel sheet, at 2"d
gusset from bottom.
Completed wall with added end treatment. Photo ' Field measure of length of contact for gusset at the
taken June 8, 2024. steel sheet.
- <
By: '/� Date: a 6 `' HANSON Sheet No.: of:
Checked by: Date: Engineering I Planning I Allied Services Project No.:
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Hanson Professional Services Inc.
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