Ltr_regarding_slope_of_footings_drain_lines.pdfLM,11ligI1111111
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Engineers / Surveyors
Lovell-Sauerland and Associates, Inc.
19217 36th Avenue West, Suite 106
Lynnwood, Washington 98036
City of Edmonds Engineering Division
121 51h Avenue N
Edmonds, WA 98020
Planners / Deve
Re: Rotary Club 2 -lot Plat, 8116 2061h Street SW. (Subdivision File #20150063)
Engineering Site Plan Construction Evaluation Letter
Phone: 425-775-1591
LSAEngineering.com
Consultants
July 8, 2016
LSA No. 5465
Per Mr. Bob Setting's request, LSA is pleased to provide the following professional engineering
evaluation of the proposed footing drain system for the Rotary Club 2 -lot Plat at 8116 206'h Street SW.
The engineering site plan included the installation of footing drain discharged into the drywell for lot 2.,
During the course of construction activity, footing drain pipe slope was installed at 6% instead of 7.5%
as indicated on the construction plan.
Per the "Geotechnical Investigation" prepared by Liu & Associates, Inc., dated May 20, 2014,
groundwater was not encountered by the test pits (TP -1 @ 7.0 feet deep, and IT -1 @ 8.0') excavated on
the site.
Per the "Footing Drain Discharge" prepared by Liu & Associates, ltic., dated August 18, 2014, based on
the subsurface condition encountered by the test pits, the amount of groundwater, if any, to be collected
into footing drain of the proposed residence will be insignificant. Therefore, the footing drain discharged
into the drywell at 6% pipe slope will be adequate and acceptable to dispose water in footing drain.
If you have further questions or need additional information, please give me a call.
Sincerely,
John W. Yuen, P.E.
Project Engineer
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