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-----Original Message----- <br /> From:Jane Zimmerman [mailto:JZimmerman@everettwa.gov] <br /> Sent: Tuesday, November 10, 2015 8:34 AM <br /> To: 'Jesse Jarrell' <br /> Cc: Kirk Brooks <br /> Subject: RE: 29 and 31 112th st Drainaige <br /> Hi Jesse - <br /> How much total impervious area has been created on this lot, including the home, driveway and patio? <br /> Jane <br /> -----Original Message----- <br /> From:Jesse Jarrell [mailto:jessej@wesi.co] <br /> Sent: Monday, November 09, 2015 5:23 PM <br /> To:Jane Zimmerman <br /> Cc: Kirk Brooks <br /> Subject: FW: 29 and 31 112th st Drainaige <br /> Jane, see attached for potential drainage resolution on the single-family building lot adjacent to the Harvey short plat on <br /> 112th. Basically, I don't really see much in the drainage manual in regards to on-site drainage design for patio areas. In <br /> order to help mitigate the potential drainage impacts from the concrete patio installed behind the new house, I've <br /> proposed to heavy amend the soils between the concrete patio and the existing fence along with installing some low <br /> growing vine maple trees along the fence line to help soak up any runoff traveling from the patio towards the off-site <br /> stream. Let me know if you think this is a reasonable mitigation measure to address the recent violation on the project. <br /> Only other option I can think of would be to install a 2' wide by 2' deep gravel trench the length of the back fence line to <br /> help infiltrate some of the runoff. Not sure on the existing restrictive soil depths though so not sure if that's a viable <br /> option. <br /> Let me know your thoughts on the matter, thanks. <br /> Jesse Jarrell, P.E. <br /> 9740 Evergreen Way ***NEW LOCATION*** <br /> Everett, WA 98204 <br /> 425-356-2700 xt.106 <br /> www.wesi.co <br /> -----Original Message----- <br /> From:Jesse Jarrell [mailto:jessej@wesi.co] <br /> Sent: Monday, November 09, 2015 5:03 PM <br /> To: 'Lance Harvey' <br /> Subject: RE: 29 and 31 112th st Drainaige <br /> Here's what I've got for approximate locations of the rear conc patio and fence in red. Basically noted to install 6" depth <br /> of top soil and plant some low growing vine maple to help soak up some of the runoff. Other than this, about the only <br /> 3 <br />