HomeMy WebLinkAboutComments PWE 1/17/2008
Memorandum
C~tyof Springfield
Subject:
January 17, 2008
Steve Hopkins, Urban Planner
Jesse Jones, Civil Engineer
DRC2007-00077, Thurston Elementary Schooli:
Date:
To:
From:
I have reviewed the materials provided with the subject application. The recommended
findings and conditions outlined below are provided for you} use in preparing the
land-use decision.
GENERAL. . I
Finding: The subject property is an I lA-acre parcellocateq at 7345 Thurston Road
(Map 17-02-35-00, Tax Lots 02100 and 02600). The existing use is an elementary
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school. Approval of this proposal would allow construction of a replacement school on
the site and demolition of the existing buildings.' .
SANITARY SEWER
Finding: Section 4.3-105.A of the SDC requires that sanitary sewers shall be installed to
serve each new development and to connect developments to existing mains.
Additionally, installation of sanitary sewers shall provide sufficient access for
maintenance activities.
Finding: The applicant has proposed to maintain the current connection to the existing
IS" sanitary sewer line located in Thurston Road, as shown'on plan sheet C-lll- T.
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Finding: Pursuant to Chapter 3.03.4.A of the City's Engineering Design Standards and
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Procedures Manual and Section 4.4 of Portland's Stormwater Management Manual, solid
waste storage areas shall be covered and hydraulically isol~ted from potential storm water
runoff, and directed to the sanitary sewer system. The applicant has complied with this
section of the code by isolating the trash/recycle area as shJwn on plan sheet C-112-T.
STORMW A TER MANAGEMENT
Finding: Section 4.3-110.B of the SDC requires that the Approval Authority shall grant
development approval only where adequate public and/or phvate stormwater
management systems provisions have been made as determined by the Public Works
Director, consistent with the Engineering Design Standards and Procedures Manual
(EDSPM).
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Finding: Section 4.3-11 O.D of the SDC requires that run-off from a development shall be
directed to an approved stormwater management system wi,th sufficient capacity to
accept the discharge. Section 4.3-11 O.E of the SDC requirbs new developments to
employ drainage management practices, which minimize the amount and rate of surface
water' run-off into receiving streams, and which promote wkter quality.
, Date Received: \ - \ l-O"'D
Planner: SH
Finding: To comply with Sections 4.3-11 O.D & E, storrnwatL r:moff from 'the site will '
be directed into a senes of vegetative swales and filtered cat~h basins prior 'to discharge
into the public system. The connection to the public system I!will be at the rtorthwest
comer of the site as shown on sheet C-lll- T. '
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Finding: The applicant proposes to connect a private 24" stolmwaterline into the
existing public 8" storm water line located in Thurston Road I~s depicted onSheet C- 11 1-
T. This configuration will likely surcharge the existing 8" s~prmwater line in Thurston
Road and may cause the site stormwater system not to function as designed.
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Condition: Verify that the 8" stormwater line located inllThurston Road (as
depicted on Sheet C-l11-T) will not surcharge during normal operation.
Alternatively, redesign the stormwater system with new ~onnection points to the city
system or upsize the existing 8" stormwater PiPe.Please!llcontact Jesse 'Jones @736-
1036 for additional information. . "
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WATER OUALITYII , '
Finding: Under Federal regulation of the Clean Water Act (€W A), Endangered Species
Act (ESA), and National Pollutant Discharge Elimination S~stem (NPDES), the City of
Spri~g.field ha~ obtain~d a M.unicipal Separate Storm Sewerl:System (MS4~ perm!t. ~
provIsIOn of this permit reqUires the City demonstrate efforts to reduce the pollutIOn III
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urban stormwater to the Maximum Extent Practicable (MEP,~.
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Finding: Federal and Oregon Department ofEnvironmentall;Quality (ODEQ) rules
require the City's MS4 plan address six "Minimum Control Measures." Minimum
Control Measure 5, "Post-Construction Stormwater Manage~ent for New Development
and Redevelopment," applies to the proposed development.
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Finding: Minimum Control Measure 5 requires the City of ~pringfield to devel,op,
implement and enforce a program to ensure the reduction oflPollutants in stormwater
runoffto the MEP. The City must also develop and implenient strategies that include a
combination of structural or non-structural Best ManagemeAt Practices (BMPs)
appropriated for the community. .11"
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Finding: Minimum Control Measure 5 require~ the City of ypringfield use.. an ordinance
or other regulatory mechanism to address post construction runoff from new and re-
development projects to the extent allowable under State la~. Regulatory mechanisms
used by the City include the Springfield Development Code:I(SDC), the City's
Engineering Design Standards and Procedures Manual (EDSPM) and the future
Stormwater Facilities Master Plan (SFMP). ::
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Finding:' As required in Section 4.3-11 O.E of the SDC, "adlvelopment shall be required'
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to employ drainage management practices approved by the Public Works Director and
consistent with Metro Plan policies and the Engineering De}ign Standard~ and
Procedures Manual." "" ,',
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Finding: Secti~n 3.02 of the City's EDSPM states the Publit Works DeRartqJent will
II Date Recelvect
. , , Planner: SH \ -\1 - 0 8,
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accept, as interim design standards for stormwater quality, water quality facilities
designed pursuant to the policies and procedures of either the City ofPortlimd (BES), or
the Clean Water Services (CWS).
Finding: Section 3.03.3.B of the City's EDSPM states all public and private development
and redevelopment projects shall employ a system of one or more post-developed BMPs
that in combination are designed to achieve at least a 70 percent reduction in the total
suspended solids in the runoff generated by that development. Section 3.03.4.E of the
manual requires a minimum of 50 percent of the non-building rooftop impervious area on
a site shall be treated for stormwater quality improvement using vegetative methods.
Finding: To meet the requirements of the City's MS4 permit, the Springfield
Development Code, and the City's EDSPM, the applicant has proposed several
vegetative swales. The planting plan is consistent with the requirements of the City of
Portland's Stormwater Management Manual.
Finding: The vegetation proposed for use in the vegetative swales and infiltration basins
will serve as the primary pollutant removal mechanism for the stormwater runoff, and
will remove suspended solids and pollutants through the processes of sedimentation and
filtration. Satisfactory pollutant removal will occur only when the vegetation has been
fully established.
Condition: To ensure a fully functioning water quality system and meet objectives of
Springfield's MS4 permit, the Springfield Development Code and the EDSPM, the
proposed vegetative swales, shall be fully vegetated with all vegetation species
established prior to issuance of the tentative occupancy building permit.
Alternatively, is this condition cannot be met, the 'applicant shall provide and
maintain additional interim erosion control/water quality measures acceptable to
the Public Works Department that will suffice until such time as the swale
vegetation becomes fully established.
PUBLIC STREETS. SIDEWALKS & IMPROVEMENT AGREEMJ!:N,!~
UTILITIES. EASEMENTS AND RIGHTS OF WAY
Finding: Section 4.3-130.A of the Springfield Development Code requires each
development area to be provided with a water system having sufficiently sized mains and
lesser lines to furnish adequate supply to the development and sufficient access for
maintenance. Springfield Utility Board coordinates the design of the water system within
Springfield city limits.
Finding: Section 4.3-140.A of the SDC requires applicants proposing developments
'make arrangements with the City and each utility provider for the dedication of utility
easements necessary to fully service the development or land beyond the development
area.
Finding: A proposed 7.0' P.U.E. along the Thurston Road frontage of the parcel is
depicted on Sheet C-lll- T.
Date Received' )- 11-0'6
,Planner: SH
OTHER PERMITS
\
OTHER
NOTE: The intent of this list is to give a developer insight about requirements related to
public improvements before they develop their property.
FEES AND PERMITS Ii
SYSTEMS DEVELOPMENT CHARGE:
Pay applicable Systems Development Charges when buildiJg permits are issued for
developments within the City limits or within the Springfiela Urban Growth Boundary.
(The cost relates to the amount of increase in impervious suiface area, transportation trip
rates, and plumbing fixture units. Some exceptions apply td. Springfield Urban Growth
areas.) [Springfield Code Chapter II, Article 11] II, .
Systems Development Charges (SDC's) will apply to the construction of buildings and
site improvements within the subject site. The Charges willi be based upon the rates in
effect at the time of permit submittal for buildings or site irriprovements on each portion
or phase of the development.
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SANITARY SEWER IN-L1EU-OF-ASSESSMENT CHARGE:
Pay a Sanitary Sewer In-Lieu-of-Assessment charge in addition to the regular connection
fees if the property or portions of the property being'developed have not previously been
assessed or otherwise participated in the cost of a public sanitary sewer. Contact the
Engineering Division to determine if In-Lieu-of-Assessment charge is applicable. lOrd
5584]
PUBLIC INFRASTRUCTURE FEES:
It is the responsibility of the private developer to fund the public infrastructure.
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OTHER CITY PERMITS:
Encroachment Permit or Sewer Hookup Permit (working ~ithin right-of-way or public
easements) example: new tap to the public storm or sanitatY sewer, or adjusting a
manhole. [The current rate is $135 for processing plus applicable fees and deposits]
Land & Drainage Alteration Permits (LDAP). [Contact the! Springfield Public Works
Department @ 726-5849 for appropriate applications/requitements]
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ADDITIONAL PERMITS/APPROV ALS MAY BE NECESSARV~
....: _,.'" ,,~eceived.
Planner: SH
k 17/0c:6
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. Metropolitan Wastewater Management Commission I (Pump station, sanitary
sewers 24 inches or larger) II
. Lane County Facilities Permit (If the project is withi,n Lane County jurisdiction)
. Railroad (If the project crosses a railroad)
. Oregon Department of Transportation (Ifthe project is within ODOT jurisdiction)
. Division of State Lands (Storm water discharge, wetlands)
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. Oregon Department of Environmental Quality (Erosion control (5 acres or
greater), pump station, storm water discharge, wetlands)
. U.S. Army Corps of Engineers (Storm water dischar~e, wetlands)
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.. Date Received: I ~ 17 - ~ 6
Pla!1ner: SH