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HomeMy WebLinkAboutSUPPLEMENTAL MATERIALS (3-7-18)TECHNICAL MEMORANDUM (Branch EltINEERING-- Since 1977 DATE: March 7, 2018 PROJECT: Capital Hill PUD PRpFFS TO: Nick Gioello, Associate Planner s IWC ~O City of Eugene #79232 PE signed by Nathan Pa n CC: Carol Schirmer Date: 2018.03.0712:55:22-08'00' OREGON Schirmer Satre Group ~ O 9 Fc ~ . 21, 2 )AVt PA FROM; Nathan Patterson, P.E. Damien Gilbert, P.E. EXPIRES: 12/31/18 Branch Engineering, Inc. RE: City of Eugene Stormwater Review Applicability This memo is in response to information submitted into the record related to deferring review of certain standards to the building permit process. Detailed individual house designs, and the associated building appurtenances, including but not limited to stormwater and other private utility designs, are reviewed by the public works representatives and the building official and are governed by the building and plumbing specialty codes, as well as the stormwater ordinance. Specifically, similar to designing a detailed foundation for a house, a private stormwater detention and disposal system for a future unidentified home is too detailed to design during the Tentative PUD planning phase. Stormwater systems are directly related to the size and configuration of the impervious surface(s) they will drain and cannot be designed with any confidence prior to design of the house, driveway, and other impervious surfaces. Similarly, the system layout is dependent on the actual location and layout of the house on the lot. All of the proposed roadway detention systems account for the e-dsting upland lots as they emst today. The PUD process doesn't require the detailed design of the home on each lot, and therefore cannot require the detailed design of appurtenances to the home including private utility services and individual detailed stormwater system(s). EUGENE-SPRINGFIELD ALBANY 310 Sch Street, Springfield, OR 97477 1 p: 541.746.0637 I www.branchengineering.com