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Sabrina Fandler <br /> From: Arnie Roshak <br /> Sent: Monday,June 19, 2017 1:04 PM <br /> To: Sabrina Fandler <br /> Cc: Brian Doolan <br /> Subject: 3317 Wetmore Ave <br /> Follow Up Flag: Follow up <br /> Flag Status: Flagged <br /> Hi Sabrina, <br /> See my comments on 3317 Wetmore Ave below: <br /> The proposed impervious area given on their drawing looks low. Since they are adding/replacing more than 2,000 sf of <br /> impervious then minimum requirement 1-5 will apply for this project. They won't trigger flow control (MR7)for this <br /> project. We had discussed them doing permeable pavement with an underdrain,which (under the 2010 stormwater <br /> manual)will help keep them under the threshold—looks like they are now showing a combination of permeable and <br /> concrete pavement, and added landscaping between buildings. Please have them verify their new/replaced impervious <br /> numbers. ( , ; Sr(\Q, <br /> Disconnect the roof drains from the proposed storm drain lateral and allow the roof drainage to discharfsjallie surface, <br /> to meet the code requirement. They can just do a splash block from building one and sheet flow through landscaped <br /> `area toward Wedmore Ave. The curb does not look high enough for a sidewalk drain to be feasible. For building 2, <br /> prefer they also direct toward Wetmore since that's where this site currently drains to. See if they can put the drain <br /> under the pavers and discharge to the surface once they get past building 1. If that's not feasible due to grade <br /> limitations,then discharge using splash blocks to the landscaped area between the buildings and then to the new CB. <br /> Their contours do not match what we have in the GIS,Wetmore is shown about 15 ft higher elevation than what is in <br /> Gosync (?). <br /> They need to show inverts and slopes for the proposed side sewer and storm drain lines. They are responsible for <br /> making sure they have enough drop to make the connection to the sewer main.. <br /> /They also need to show proposed grading on their plan so we can confirm this site will drain properly. <br /> I requested an inspection of the sewer in the alley—I don't see it in GraniteXp yet. Brian—this was SML3095H17, I <br /> requested a couple weeks ago. The sewer in the alley is old but doesn't have capacity issues. This pipe and the sewer <br /> line in Wetmore discharge to a pipe on 35th that has a 5-10 year level of service. <br /> Thanks, <br /> Arlie Roshak, PE <br /> City of Everett Public Works <br /> 3200 Cedar St <br /> Everett,WA 98201 <br /> Direct:425-257-7249 <br /> Fax:425-257-8882 <br /> ARoshak@everettwa.gov <br /> 1 <br />