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HomeMy WebLinkAboutNotes, Meeting PLANNER 10/18/2005 , . . 'i' DRC REVIEW PUBLIC WORKS REVIEW CITY OF SPRINGFIELD, OREGON ~ DRC REVIEW: October 18, 2005 Le2acv Estates Subdivision Prepared by Matt Stouder, EIT SUBDIVISION TENTATIVE SUB2005-00047 Planner: Jim Donovan The above application was reviewed by Public Works Engineering and determined to be incomplete for review. . SANITARY SEWER 1. The sanitary sewer system shall be designed to extend to the limits of the development for future service to lands to the south. The sewer extension through . lots 9 & 10 will only be allowed in the event cover requirements dictate n:e. - cover does not exist to place sewer in public streets). . 2. The existing septic tanks and drain fields located on the property should be shown on the existing conditions sheet. A note should be added to the plans indicating the tanks will be decommissioned in accordance with state law. STORMW ATER MANAGEMENT 3. As required in Section 1.4 of the annexation agreement prepared for this property, the applicant is responsible for constructing public stomlwater management . systems to collect, treat, convey and discharge stonnwater from the subject property and the upstream tributary areas within the Springfield UGB to an approved outfall into the McKenzie River. As such, the following requirements apply: a. Section 35.040(3)(c) of the Springfield Development Code (SDC) requires the size and location of stonnwater management systems and components, including drain lines and stonnwater quality measures, be shown on the stonnwater management plan. The location of the proposed drainage channel should be shown on the plan set in its entirety, along with Tax Lot 400. Flow lines, pipe sizes and/or channei sections should be clearly defined on the plans. The location of the proposed swale outfall should be clearly shown on the plans. Associated easements with the swale should also be shown on the plans, in accordance with the annexation agreement. b. Section 35.040(6)(n) requires the applicant provide evidence that any required federal or state pennit has been applied for or approved. This infonnation should be submitted concurrently with the subdivision application. Agencies to coordinate with include the Division of State Lands, the Anny Corps of Engineers, Lane County and potentially the Oregon Department ofFish & Wildlife. . . . ID-I&-o6- cate RtilQIIllvelL !..... Planner. i'.' ._@~- \ O..y2~ \,', ~, , . . c. Ensure the location of the proposed drainage swale is not located in the disputed Tax Lot 300, as shown on recorded Partition Plat 92-P0235. The 'location of any public improvements will not be allowed in the un- annexed disputed area of Tax Lot 300, unless the applicant can , demonstrate the property is annexed and owned by the Prodens. d. Clearly show how the proposed stormwater system will pick up and convey drainage from surrounding streets and systems. Specifically, provisions for the drainage from surrounding areas, including 16th, 17th and Vera Streets should be made. The applicant should clearly show how the existing public stom1 drainage system from Grand Vista Drive will connect to the proposed swale. e. Please submit a detailed hydrological study map for the proposed drainage basin (including the off site areas in their entirety). Refer to Section, 4.03.1 of the City's EDSPM for details. Specifically, the study map should include the well defined drainage basin, flow arrows in streets and ditches, and contours or spot elevations for verification of direction of overland flow and pipe cover. A specific narrative pertaining to the off- o site flows and basin boundary would be beneficial. 4. An updated hydrology study, with revised drainage basin area, revised hydrologic calculations, and revised hydraulic calculations needs to be submitted. 5. The well houses shown on the existing conditions plan sheet will need to be decommissioned in accordance state law. 6. Sheet 4 shows a 24 inch stonn pipe extending to 1ax Lot 400, then into a proposed conveyance swale. A note on the plans states to extend this pipe as an 18 inch pipe. Please revise this conflict prior to the next plan submittal. WATER QUALITY 7. A planting plan will be required for the proposed swale to ensure water quality standards set forth in the Spl1ngfield Development Code and EDSPM are met. The planting plan should be consistent with the City of Portland's Stonnwater Management Manual, and can be prepared by the engineer, or a licensed ' Landscape Architect.