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Example: 36" pipe originating at grated manhole behind 384 Delwood ( #50138) <br /> reverts to a 24" pipe segment at Delwood ( #50136 to 50135), then back to 36" pipe <br /> until outletting to open drainage just north of W 37th Ave. ( #50115). It then <br /> reenters 24" pipe behind W 35th Pl. ( #50107), outlets to open drainage at Frederick <br /> ( #51204), then reenters 33" pipe west of Olive ( #51239) that is shortly restricted to <br /> a 27" segment along W 34th Ave. ( #51271 to 51285). Pipe system alternates <br /> between 30" and 36" segments along E 33rd Ave. until it outlets to the Amazon. <br /> The area cited in the above example, the mid and lower section of this drainage <br /> complex, appears to harbor the potential for creating surcharging and /or localized <br /> flooding conditions at the various diameter restrictions and inlet choke points as <br /> additional flows are introduced.to the system from upstream development. <br /> Recommended Solution: Conduct flow analysis of entire system based on the <br /> projected full development of the drainage basin. Study feasibility of reconstruct- <br /> ing sections and /or pipe segments of the existing system that do not meet design <br /> standards necessary to adequately service flows based on full basin development. <br /> Acquire necessary easement from new development to allow maintenance access to <br /> the grated manhole inlet to the piped system behind 384 Delwood St. ( #50138). <br /> Also, enclose the short section of open drainage to pipe between 36" outlet just <br /> north of W 37th Ave. ( #50115) and inlet to 24" pipe leading to Frederick St. <br /> ( #50107) to eliminate potential maintenance problems associated with this inlet. <br /> Reconstruct under -sized system components as appropriate. <br /> Status: Engineering has begun research for project design. Because of the scope of <br /> this project, Engineering recommends the services of a consultant. <br /> 15. Location: Open ditch along west side of Trainsong Park. <br /> Nature of Problem: Open drainage ditch from Lassen St. to the north edge of <br /> Trainsong Park has a history of use as an illegal dumping site for old appliances, <br /> tires, animal carcasses, household garbage, and drug paraphernalia resulting in <br /> citizen complaints /requests for City maintenance action. <br /> Recommended Solution: Enclose ditch to pipe from beginning of ditch at Lassen <br /> St. to the north edge of Trainsong Park. If system is to connect with existing or <br /> proposed systems to the west, include piped crossing under Hwy 99 with the <br /> impending reconstruction project. <br /> Status: Preliminary design options established. Project has not been pursued due to <br /> cost /benefit. Easement required. <br /> 16. Location: 13th Ave. and Interior St. <br /> Nature of Problem: Flooding of entire intersection and adjoining properties during <br /> ,•r„i„, ,� h. 8 <br />