Rain Garden Location Justification EmailRichardson, Zachary
From:
Donna Breske <donnab@donnabreske.com>
Sent:
Monday, June 1, 2020 12:04 PM
To:
Richardson, Zachary
Cc:
Lambert, Jennifer
Subject:
Re: BLD20191496
Hi Zach,
The previous design location was too far uphill in the back yard. I changed all the pipe to 6 inch pvc at 1
percent slope, ( as opposed to 4 inch at 2 percent minimum slope) in order to get all the grades to work.
This design places the bioretention as far away from the downhill property line, while at the same time
harmonizing all the pipe slopes for the conveyance path of stormwater to travel to bioretention.
Also, LID BMPs are to be designed to the maximum extent feasible, ( not to life and safety standards, say like
the engineering design for a Boeing Airplane.) The design I present meets the maximum extent feasible
standard in my professional opinion.
Sincerely,
Donna L. Breske, PE
21 Ave A, Suite 4, Snohomish, WA 98290
Mobile: 206-715-9582
Phone: 360-294-8941
Dolma Breske
As sod ates
From: Richardson, Zachary <Zachary.Richardson @edmondswa.gov>
Sent: Monday, June 1, 2020 6:25 AM
To: Donna Breske <donnab@donnabreske.com>
Cc: Lambert, Jennifer <Jennifer.Lambert@edmondswa.gov>
Subject: RE: BLD20191496
I see you shifted the rain garden location again, but the previous location was far preferred. The last location you had
shown lengthen the overflow path significantly before impacting other property and kept it as far from the slope as
possible. Is there a the BMP had to shift again? Unless its infeasible, we would prefer the previous design location
(further south).
Zachary Richardson, PE
Stormwater Engineer I City of Edmonds
121-5th Ave N Edmonds, WA 98020
425.771.0220 Ext. 1323
Zachary. Richardson(aDedmondswa.gov
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From: Donna Breske <donnab@donnabreske.com>
Sent: Sunday, May 31, 2020 6:21 PM
To: Richardson, Zachary <Zachary.Richardson@edmondswa.gov>
Cc: Lambert, Jennifer <Jennifer.Lambert@edmondswa.gov>
Subject: Re: BLD20191496
Zach,
I appreciate the quick review comments you sent via e-mail, and the ability to fold these into your current
review.
Attached is an updated drawing set with a bioretention details on Sheet 1 that is consistent with depths of
strata modeled in the Drainage Report.
Also, I have re -done to pipe routing system from the proposed catch basin within the driveway and elevations
and inverts and location of the bioretention to balance the elevations of the entire system to more seemlessly
fit into the existing grade of the back yard where the bioretention is to be located.
Donna L. Breske, PE
21 Ave A, Suite 4, Snohomish, WA 98290
Mobile: 206-715-9582
Phone: 360-294-8941
Donna Breske
e As sod ates
From: Richardson, Zachary <Zachary.Richardson@edmondswa.gov>
Sent: Thursday, May 28, 2020 9:35 AM
To: Donna Breske <donnab@donnabreske.com>
Cc: Lambert, Jennifer<Jennifer.Lam bert@edmondswa.gov>
Subject: RE: BLD20191496
A couple issues I noticed; if you want to revise and resubmit these plans by email I'll fold the corrections into this review.
Bioretention on plans does not match drainage report/model; update one or the other to be consistent.
a. 2.52' depth? This exceed maximum surface ponding depth (12")