9900 19TH AVE SE 2018-01-02 MF Import

CNIL ENGINEERING. LAND PLANNING. SURVEYING. ENVIRONMENTAL SERVICES November 26, 1997 Gordon Witcher City of Everett Public Works Department 3200 Cedar Street Everett, WA 98201 RE: Home Base Resubmittal Our Job No. 5947 Dear Gordon: 0EMH M 60V L u 1997 CITY OF EVERETT .. Permit Services Enclosed are five sets of revised grading, storm drainage, and utility plans and two sets of revised storm drainage calculations. These plans have been revised to incorporate the enclosed redline review plan comments, as well, Ame value engineering items described in the following paragraphs. As requested, channelization has been added to the 100th Street S.E. street improvement plan. Signalization plans for the intersection of 100th Street S.E. and 19th Avenue S.E. will be submitted by the Traffic Engineer under separate cover. As discussed in previous telephone conversations, we have revised the water main and sanitary sewer extension plans. The minimum slope of the proposed sanitary sewer has been increased to 1 percent. This most likely will require Home Base to pump the sanitary sewer outflow from the building to the proposed system, as noted on the plans. The contractor will verify the need for this pump based on field verification of existing sanitary sewer and stub location/elevation information in 19th Avenue S.E. and by the building plumbing plans. The proposed site elevation has been lowered approximately 1.3 feet to reduce the substantial amount of import fill required to bring the si-,. to final grade and reduce retaining wall heights where possible. Storm drainage, sanitary sewer, and utilities have been lowered accordingly. We have also responded to the comments from a meeting held with Jane Zimmerman of the Public Works Department concerning storm drainage detention, water quality, and wetland compensation. From this meeting, we have added items to the plans such as access to wet/detention ponds for maintenance and clarified portions of the storm drainage report. An emergency overflow has been provided for each pump system in case of pump failure or loss of power. Complete pump plans and calculations will be submitted under separate cover for your review. These plans will include high water alarms and details of all pump operations, elevations, and criteria. 18215 72ND AVENUE SOUTH KENT. WA 98032 (425) 251-6222 (425) 251-8782 FAX