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SOUNDVIEW TECHNOLOGY CENTER EVERETT, WA <br /> Note sediment laden runoff <br /> ywl <br /> �0 - from de-stabilized bank noted <br /> in photo 11 <br /> _ #.MArxKA bg Y � <br /> Confluence of Basin C and D. <br /> r S <br /> 12 Compromised bank stabilization <br /> at existing vault outfall <br /> Basin D <br /> The stormwater runoff from Basin D flows in an easterly direction.The existing basin flows exit the site <br /> into a 12" conveyance system in 36t" Avenue West. The conveyance system discharges into a manmade <br /> channel east towards the existing Boeing facility, see photo 13. The manmade channel has signs of <br /> surface flow. Approximately 350'west of 36t" Ave., the channel enters an 18" conveyance system that <br /> connects to an existing stormwater pond near the northwest corner of the existing Boeing facility, see <br /> photo 14. The pond outlets via a submerged 12" pipe in the northeast corner, see photo 15. <br /> The 12" conveyance system discharges into an existing ravine approximately 80' north of the pond, see <br /> photo 16. The ravine has signs of surface flow in the swale and continues northerly direction until <br /> entering a 12" culvert crossing Sound Ave., see photo 17. The pipe discharges into an existing ravine, <br /> traveling in a northwesterly direction until it ultimatelyjoins at the confluence of Basin C. <br /> SEPTEMBER 23, 2022 STORMWATER DRAINAGE REPORT PAGE 17 <br />