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HomeMy WebLinkAboutComments PWT 12/19/2005 " ,,,, Memorandum City of Springfield Date: To: December 19,2005 REVISION Sarah Summers, Planner II ' Gary McKenney, P,E., Transportation Planning Engineer SUB2005-00030 King Henry's Court Subdivision , ~ecJ 1'2.~lq-a5 From: Subject: The Transportation Division has 'reviewed the matei;als provided with the subject application, The recommended findings and conditions outlined below are pro~ided for your use in preparing the land"use decision, . General Finding: Approval of this proposal would allow platting of a I O-lot r'esidential subdivision on . .. ~ property located at the northwest comer of Hayden Bridge Road and 19, . Street (Map 17 03 24 34, Tax Lot 1100), The development site is approximately 1,79 acres (322 feet by 234 feet) with the long dimension on 19th Street An existing house on the property would be removed, Both 19th Street and Hayden Bridge' Road are classified as collectOl: streets and are Lane County roads,' . . Subdivision Access and Circulation Findin!!': Installation of driveways on a street increases the number of-traffic conflict points. The greater number of conflict points increases the probability of traffic crashes, Effective ways to reduce the probability of traffic crashes include: reducing the number of driveways, increasing distances between intersections and driveways, and establishing adequate vision clearance where driveways intersect streets, Each of these techniques permits a longer"less cluttered sight distance for the motorist, reduces the number and difficulty of decisions drivers must make', and. contributes to increased'traffic safety, SDC 32,080(1) (a) stipulates that each parcel is entitled to . . "an approved access to 1\ public street" . Finding: Existing access to the properly is via a 14-fo01 wide driveway onto Hayden Bridge Road, which would be closed. The applicant proposes a 16-foot wide joint-use access easement to serve L6ts 8, 9 and 10 via a driveway onto Hayden Bridge Road at the western boundary of . the property, No lotswould take direct access to either 19th Street or Hayden Bridge, Road,' . . . Findin!!': As conditioned b~low ingress-egress points will be planned to facilitat~ traffic and pedestrian safety, avoid congestion and to minimize curb cuts on public streets as specified in SDCArticles 3 I and 32, applicable zoning and or overlay dist!;ct ArtiCles, and applicable refi~ement plans, ' . , Recommended Condition: Provide and maintain adequate visioncleiuance triangles at the, corners of all site'driveways per SDC 32,070. . . ~ SUB2005-00030King Henr is Court Subdivision December 19; 2005 REVISION Page 2 of 2 Transoortation Svstem Imoacts and Imnrovements . Findinl!: Abutting the ~ubj~~t 'site,both Hayden Bridge Road and 19th S'treet are two-lane major collector streets, and are'under Lane County jurisdiction. The streets are improved with paving, curb/gutter, bicycle lanes, street lights and sidewalks, which support multi-modal traveL Traffic volumes on Hayden Bridge Road and 19th Street are approximately 8,400 vehicles per day and 3700 vehicles per day respectively, 'LTD Route #12 provides regular transit bus service to the site along Hayden Bridge Road and connects to the greater transit system via Springfield Station, At the intersection of Hayden Bridge Roadl19th Street dedicated left-turn lanes are provided and traffic is controlled by a multi'phase traffic signaL findinl!: Based on ITE Land Use Code 210 (Single-Family Detached Housing) trip generation from the 10 dwelling. units allowed by this subdivision would be as follows: . Average Weekday = .10 dwelling units x9,S? trips per dweJling unit ~ 100 trips .' PM Peak Hour = 10 dwelling units X 1,01 trips per dwelling unit = 10 trips In addition, the assumed developnlent would generate pedestrian and bicycle trips, According to the "Hou'sehold" survey done by LCOG in 1994, 12,6 percent of household trips are made by . bi,cycle or walking and 1.8 percent are by transit bus, These trips may have their origins or destinations at a variety ofland uses, including this' use, Pedestrian and bicycle trips create the need for sidewalks, pedestrian crossing signals, crosswalks, bicycle parking and bicycle lanes, . Findinl!: Street lighting is installed along Hayden Bridge Road and 19th Street abutting the development site, No street lIghting is proposed within the King Henry's Court cul-de-sac, To provide for safe pedestrian and vehicular access, street lighting is needed that will adequately illuminate the street and sidewalk areas adjacent to the development site, The city's street lighting staridards, which are based on the Illuminating Engineering Society (IES) American National Standard Practice for Roadway Lighting RP-8; specify the lighting type and required lighting levels for street and pedestrian areas, Findinl!: As conditioned below, existing and planned transportation faciiities would be adequate' . to accommodate additional trips that would be generated by the proposed development in a safe and efficient manner. Recommended Condition: The public improvemlmtplans for 'the King Henry's Court cul-de-sac shall include street lighting in conformance with current City design standards. . . Comment: Construction activities within the abutting Hayden Bridge Road and 19th Street rights-of-way will require permits from Lane County.. J ':\ ~ DRC REVIEW PUBLIC WORKS REVIEW . CITY OF SPRINGFIELD, C?REGON DRC REVIEW: December, 2005 Blair Subdivision Prepared by Matt Stouder, EIT SUBDIVISION TENTATIVE SUB2005-00030 Planner: Sarah Sun1mers The above application was reviewed by Public Works Engineering. The following conditions shall be addressed before approval of either the Final Plat or Public Improvement Project: , SANITARY SEWER Finding: Section 32.100 of the SDCrequires that sanitary sewers shall be installed to serve each new development and to connect developments to exist~ng mains. . ,Finding: The applicant has proposed extending an 8 inch public sanitary sewer line from 19th Street to service all lots in the proposed subdivision. The sewer line is proposed to extend to Jot 7, and then split and run north and south.' The northerly line will lie in King Henry Court, while the' southerly line will serve lots 8~ 1 0 via a back lot easement A large portion of the publicline is proposed to be located behind th(l sidewalk in'a 7 foot. Public Utility Easement Finding: An extra-territorial agreement wi]] be needed due to eonstruction of the . d I" 19'10 S'. 'I il> S '(' I h . " propose sewer me 111 ".m:et ') . treet 1S aounty street, tl11S t e reqmrement lor extra-terri torial agreement. ' Finding: Section 2,02,1 of the <;:ity's Engineering Design Standai'ds and Procedures . Manual (EDSPM) states that when land outside a new development will logically direct flow to sanitary sewers in the new development, the sewers shall be public sewers and 'shall nonnallyextend to one or more of the property boundaries. Finding: The City's EDSPM states in Section 2,02,8 that sewers shall be located in the right-of-way at street' centerline or within 5 feet of centerline of the street; Sewers in easements shall only be allowed after all reasonable attempts to place the mains in the. rights-of-way have been exhausted, , ~ C;mdition: The applicant shall apply for an expedited extra~territorial agreement with the City of Springfield for the proposed sewer construction in 19th Street, Condition: Prior to approval of the Public' Improvement Project, the applicant shall revise , the public sanitary sewer system to align in the street fight-of-way within 5 feet of centerline. The sanitary sewer system servicing lots 8-] 0 shall be .constructed in Hayden Bridge Road, as required in Section 2,02:8 of the City's EDSPM. .STORMW ATER MANAGEMENT Finding: Section 32,110 (2) of the SDC requires that the Approval Authority shall grant development approval only where adequate public-and/or private stonnwater management systems provisions have been made as detennined by the Public Works Director, consistent with the Engineering Design Standards and Pi:ocedures Manual (EDSPM). Finding: Section 32,110 (3) of the SDC states that a stonnwater management system shall accommodate potential run-off from its entire upstream dnlinage area, whether inside or outside of the development ' , ' Finding: Section 32.110 (4) of the SDC requires that run-off from a development shall be directed to an approved stonnwater management system with sufficient capacity to accept the discharge, Finding: Section 32.110(5) ot-the Springfield Development Code (SDC) requires new developments to employdnilnage management practices, which m,inimize the amount. and r'ate of surface water run-off into re'ceiving streams, and which promote water qmility. Finding: Stonnwater runoff from the rooftop will be directed into on site drywells, while runoff from the joint-use driveway will be directed into small vegetated infiltration trench located adjacent to'the driveway. The applicant has proposed dedication of two 8 foot private drainage easements along the south portion of the proposed, driveway to . accommodate the infiltration trenches, A private drainage easement along the easterly portion of the driveway has not been proposed to accommodat,e an infiltration trench, Finding: The applicant has shown construction notes on the utilities plan sheet indicating stonn pipe will be constructed of ADS pipe material. Current City policy does not allow the use of ADS pipe to be constructed within the right-of-way, . . . . Condition: Plior to approval of the Final Plat, the applicant shall dedicate a private drainage easement, of sufficient width, along the easterly boundary of the proposed joint- use driveway on lot 8 to accommodate runoff from the driveway, -':) Condition: Prior to 'approval of the Public Improvement Plans (PIP), the applicant shall' design the storm drainage system (within the public right-of-way) with a.pipe material approved for use in the iight-ofcway, WATER QUALITY Finding: Under Federal regulation of the Clean Water Act (CWA); Endangered Species . , Act (ESA), and National Pollutant Discharge Elimination System (NPDES), the City of . Springfield is required to obtain, and has applied for, a Municipal Separate Storm Sewer' System (MS4) pennit 'A provision of this pennit requires the City demonstrate efforts to , reduce the pollution in urban stonnwater to the Maximum Extent Practicable (MEP). -Finding: Federal and Oregon Department of Environmental Quality (ODEQ) rules require the City's MS4 plan address six "Minimum Control Measures:" Minimum Control Measure 5, '.'post-Construction StormwaterManagement for New Development and Redevelopment,". applies to the proposed development . , . . ' . Finding: Minimum Control Measure 5 requires the City of Springfield to develop, implement and enforce a program to ensure the reduction of pollutants in stonnwater runoff to the MEP, The City must also develop and implement strategies that include a combination of structural or non-structural Best Management Practices (BMPs) .appropriated for the community, ' 'Finding: Minimum Control Measure 5 requires the City of Springfield use an ordinance' . . :6r other regulatory mechanism to address post construction runoff from new and re- 'development pl'ojects to the extent allowable under State law, Regulatory inechanisms :used by the City include the Springfield Development Code (SDC), the City's Engineering Design .Standards and Procedures Manual (EDSPM) and the future Stonnwater Facilities MasterPlan (SFMP). .' '. .1 ~Finding: As required in Section 31.050 (5) of the SDC, "a development shall be required to employ drainage management practices approved by the Public Works Director and 'consistent with Metro Plan policies and the Engineering Design' Standards and Pl'ocedures Manual," Finding: Section 3,03,C of the City's Engineering Design Standards and Procedures Manual (EDSPM) requires that all public and private developments employ a system of one or most post-developed Best Management Practices (BMPs) that in combination are designed to achieve at least a 70% reduction in the TSS in the rimoffgenerated by that development: Finding: To meet the requirements of the City's MS4 pennit, the Springfield' Development Code, and the City's EDSPM, the applicant has' proposed vegetated. 'infiltration trenches to con(rol stormwater runoff from the joint-use driveway, . .Finding: A detail drawing for the vegetated infiltration trenches has not been submitted' with the plan set A vegetative seed mix, consistent with the City of Portland's . Stormwater Management Manual, has also not been proposed for use with the vegetative infiltration trenches. Condition: Prior to approval of the Final Plat, the applicant shall provide a typical detail drawing for the proposed vegetative infiltration trenches, consisteht with the City of . . :Portland's Stoimwater Management Manual, showing appropriate di~ensioris such as , . . width, depth, etc,' . . I ;Condition: Prior to approval of the Final Plat, the applicant shall provide a typical seed imix and application rate for the proposed vegetative infiltration trenches, The seed mix 1shall be consistent With"the City of Portland's Stonnwater Management Manual.