6700 HARDESON RD BASE FILE 2018-01-01 MF Import

Septanber 26, 1996 Mr. Gordon Witchsr City of Everett Public Works 32J0 Ceder Street Eva+ett WA 98201 Re: Vikiag Frcight Triad Job Nc. 95-293 City of Ever�tt Pernut No. Dear Gordon; We are writing to provide a summary of the status of the detendon in the City'a Regionel Detention Fsaliry as requested in the memorandum by Jane Zimmertnen datcd August 14, 1996. We had submitted a summary of our antiapated devdopment and impervious unas by letter with attachments datod October 24, 1995 (copy enclosed). In response to this submittal, we raxived infomution from the Ciry (Dan Mathius} summarized in our letta to Intracorp dated Novemba 13, 1995 (copy enclosed). This infocmation summarizes that the storage resaval in the Regional Detention Facility is 5.2 acre-foet, that the Overall Laundry development used 0.77 acxe-fat, and that this leaves 4.43 acre-feet storage rcmaining (as identified in Jene's mauo). Our October 24th summary was based upon a development erea (west of Herdeson) of 29.81 acre.c and an impei vious area of 21.27 acres, resulting in a required storage of 2.30 acre feet. The curroc►t Intracorp development area contributing to the Regional Detention Facility includes Lot 1 (Intracorp West), Lot 2(Intracorp West), Lot 3(Vildng Freight), Lot 4(Frito Gy), and Tract C (Water Qualiry/Detention Facility). Afl of these lots are 6epicted on the enclosed Binding Site Plan and the Impecvious Areas Exhibit. With the 6nal plans for Lot 3 and Trsct C wbmitted, and with the preliminary plans for Lots 1, 2 and 4, we have r�wised our total development erea to be 30.46 acres and the total impervious area to be 22.17 acros. JVe have discussed this updnted infortnation with Dan Mathius and he has agrced that we should adjust the storage volume required for the Intracorp lots west of Hardeson by the increased ratio of impervious unas as follows: 2l.27 imp. rerca/2.30 acre-feet etonge (rcywird prrviows) � 22.17 iosp. acres/ i�crc-faf (nqwJnd arnrwn wAerc : = 2.39 urrfxt The current Quadrant development area contributing to the Regional Detention FaciGty includes the Community Transit site. The storage required for this site is summzrized in the attached memo from W&H Pacific (copy enclosed). We have cc,ntacted Steve Pesce of W&H Paafic and he was not uble to provide the original infortnation in regerd to the impervious areas for the Community Tr�.nsit site. Therefore, no adjustments were made. Their memo summuizes that tl:e Community 7'ransit storage requirement is 2.88 acre-feet.