APPROVED ENG RESUB 2-BLD2022-1035+Storm_Drainage_Memo+8.1.2023_1.58.38_PM+3700905RESUB
Aug 02 2023
ME
BLD2022-1035
INSIGHT ENGINEERING CO.
STORMWATER Memo
For
Iron Vista Lot A
Prepared for
The City of Edmonds
121 5th Ave N
Edmonds, WA 98020
425-771-0220
Project Site Location:
19128 941h Ave W
Edmonds, WA 98020
Applicant:
Landsverk Quality Homes, Inc.
24113 561h Ave W
Mountlake Terrace, WA 98043
ENGINEERING DIVISION
APPROVED AS NOTED
10/18/2023
CALCULATIONS
ARE CONSISTENT
WITH FILL/GRADE
DRAINAGE REPORT
BLD2022-0926.
Contact:
IECO
P.O. Box 1478
Everett, WA 98206
425-303-9363
Tax Id:00434600006102
IECO Project: 20-1094
Certified Erosion and Sedimentation Control Lead:
To be named by contractor
Stormwater Site Plan Prepared By:
Nicole Maas, E.I.T.
Stormwater Site Plan Preparation Date:
July 28, 2023
Approximate Construction Date:
May 1, 2024
P.O. Box 1478 •Everett, WA 98206• P: 425.303.9363
info@insightengineering.net
The proposed project is Lot A of the Iron Vista short plat (BLD2022-0926) The site area
of Lot A is 0.28 Acres. The site is currently undeveloped and exists as lawn with a few trees. The
site contains one drainage basin that slopes steeply to the west.
The proposal is to construct a single-family home on Lot A with a driveway and associated
utilities. The total new hard surface area for the lot will be 4,174 SF. The proposed impervious
surface will be detained by the detention pipe constructed with the Iron Vista short plat. The short
plat design has allowed for 4,174 SF of impervious area from Lot A. Post -Construction Soil
Quality and Depth BMP T.5.13 will be used to manage the pervious areas on Lot A.
Iron Vista Short Plat Area = 1.23 Acres (53,749 SF)
Lot A Area = 0.28 Acres (12,056 SF)
5.1 Existing Basin Summary
Site Area
= 0.28 Acres
Study Area
= 0.28 Acres
The entire existing basin was modeled as forested area.
5.2 Developed Basin Summary
Site Area
= 0.28 Acres
Study Area
= 0.28 Acres
Impervious:
Roof = 0.07 Acres ( 2,921 SF)
Driveway = 0.01 Acres ( 684 SF)
Sidewalk = 0.01 Acres ( 569 SF)
Total Impervious = 0.09 Acres ( 4,174 SF)
Pervious Area = 0.28 Acres — 0.09 Acres = 0.19 Acres
Insight Engineering Co. - Stormwater Site Plan
5/6/2022
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TP I TFF= 247
IMFF= 236.76
BFF= 226,52 i
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Insight Engineering Co. - Stormwater Site Plan
'
FOUND REBAR W/CAP
STAMPED "22969" 0.1'(N)
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& 0.1'(W) OF CORNER
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11 Roof Area: 2,921 SF
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- Sidewalk Area: 569 SF
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Driveway Area: 684 SF
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FENCE COR. 0.2'(E) OF
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PRQPERTY, LINE
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111111
OUND REBAR W/CAP STAMPED
"22969" 0.1 '(N) OF CORNER
5/6/2022
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