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Michael P. McCann, SE <br /> DOVETAIL STRUCTURES <br /> 12821 - 49th Drfve S.E. <br /> Everett, washinqton 982os <br /> May 25, 1993 <br /> Mr. Patrick Kearney <br /> Commercial By Design <br /> 14211 - 61st P1. W. <br /> Edmonds, WA 98025 <br /> Reference: Washington Cre�it Union, Everett Hranch <br /> Stormwater Discharge To SR 99 (Pacific Highway) <br /> Dear Mr. Kearney: <br /> ' In accordance with your request of May 24, 1993, Michael P. McCann of <br /> Dovetail Structures inspected the above mentioned site for floodinq <br /> potential downstream due to stormwater �lischarge from the proposed <br /> stormwater detention system. <br /> The existing catch basin into which the proposed detention system is to <br /> discharge is a Type I with 12" concrete pipe entering and leaving at a <br /> good slope. The line appears to proceed south to one of the existinq <br /> catch basins north of 112th, where the line may cross SR 99. As some of <br /> the existing catch basins do corrtain appreciable amounts of silt, and the <br /> tops of most of the catch basins could not be removeci, it was hard to <br /> determine exactly vhere the storm line proceeded. Moreover, the traffic <br /> on SR 99 is not conducive to one's health when peering down manhole <br /> covers, so i could perform only a cursory inspection along SR 99. <br /> However, it was evident from the lay of the land, that any flow fron SR <br /> 99 due to this project coald not flow parallel to 112th to the west of SR <br /> 99. Additionally, the existing Type II catch basin in front of the new <br /> t�ehicle Emission Station on 112th has no lines entering it from the East. <br /> Theref.'ore, no flooding of 112th is possible due to this project. <br /> It miqht be well to note, though, that some of the existing catch basins <br /> south of the proposed project to 112th do need to be cleaned of silt. <br /> The land to the west is undeveloped with spotty grass cover close to the <br /> road bareing much of the soil. This fact, coupled with sandinq efforts <br /> of past winters, has undoubtedly contributed to the siltation of the <br /> catch basins mentioned above. <br /> If you have any questions, please call me at 742-0861. <br /> SINCERELY, <br /> ��,EL P. <br /> O�W H� C' <br /> cti, n C>•y <br /> � D I <br /> h <br /> 1Wf1 �t- <br /> �p,�kC����p <br /> SS�aNALE`•`�C'��C <br /> MICHAEL P. MCCANN, SE EXPIfl=S �'�(�Q,� <br />