HomeMy WebLinkAboutComments PWE 9/19/2006
Memorandum
City of Springfield
Subject:
September 19,2006
Andy Limbird, Planner II
Jeff Paschall, PE, Civil Engineer
DRC2006-00062, Embassy Suites
Date:
To:
From:
I have reviewed the matenals provided with the subject application. The recommended
findings and conditions outlined below are provided for your use in preparing the
land-use decision,
SANITARY SEWER ,
/, Finding: Section 32.100 of the SDC requires thaI sanitary sewers shall be installed to
l' serve each new development and to connect developments to existing mains,
Additionally, installation of sanitary sewers shall provide sufficient access for
maintenance activities,
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Finding: The applicant has proposed using the existing 8 inch wastewater line located at
the northeast corner of the property, The applicant has also proposed removing the '
existing 8 inch wastewater line that crosses the parcel form the northeast tO,the south
west, and replacing it with new 8 inch wastewater lines that run west and south along the
respective building frontages,
Finding: Section 2.02.1 ofthe City's Engineering Design Standards 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 nonnally extend toone or more ofthe property boundaries.
/
Finding: The City's EDSPM states in Section 2,02.8,that sewers shall be lo'cated in the
right-of-way at street centerline or within 5 'feet of centerline of the street. Sewers in
j easements shall,only be allowed after all reasonable attempts to place the mains in the
rights-of-way have been exhausted,
Finding: Pursuant to Chapter 3,03A.A of the City's Engineering Design Siandm:ds and
Procedures Manual and Section 4.4 of Portland's Stonnwater Management Manual, solid
waste storage areas shall be covered and hydraulically isolated from potential stonnwater
runoff, and directed to the sanitary sewer system,.
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Condition: Prior to approval of the Final Site Plan, the applicant shall plumb the
recycle/refuse area to the sanitary sewer system. '
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Condition: Prior to approval of the Final Site Plan, the applicant shall plumb the parking
garage area to pass through an oil/water separator and then into the sanitary sewer
system.
Date Received'
Planner: Al
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STORMWATER MANAGEMENT
Finding: Section 32.110 (2) of the SDC requires that the Approval Authority shall grant
jdeVelopment 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 Procedures Manual
(EDSPM),
Finding: Section 32,110 (3) of the SDC states that a stonnwater management syste!n,
J shall accommodatepotential run-off from its entire upstream drainage area, whether
. inside or outside of the development. . . ,
'Finding: Section 32,110 (4) ofthe SDC requires that run-off from a development 'shall be
I directed to an approved stonnwater management system with sufficient capacity to
accept the discharge. '
Finding: Section 32.110 (5) of the Springfield Development Code (SDC) requires new
j developments to employ drainage management practices, which minimize the amount
and rate of surface water run-off into receiving streams, and which promote water
quality.
Finding: To comply with Sections 32.110 (4) & (5), storm water runofffrom the site will
be directed into a series of area drains, pipes, and three vegetative water quality swales,
( before being discharged into the public stonn system in Game Farm Road and along the
south property line into and existing drainage ditch on ODOT property, ,The vegetative
water quality swales will be located along the north parcel boundary and'southeast parcel
boundary.
j' Finding: The Applicant's proposal shows the eastern half of the proposed drainage basin
#2 (0.347 acres) shall be directed to vegetative swale #2, However, an existing area drain
is depicted in this proposed basin on Sheet UT-2.
I Finding: The applicant's proposal shows t~e rooftop drai~age directed to the public
stonn system in Game Fann Road. '
J Finding: The eXist.ingpublic stonnwater system, to which the applicant proposes
connection, has limited capacity. The applicant has turned in hydrologic stonnwater
calculations, consistent with the City's EDSPM, showing that the proposed detention
pond will limit the peak stormwater'discharge rates to the pre-developed 2~year stonn
event for both the 2 and 25-year post-developed storm event, thereby limiting the flow
into the existing system, ,
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COIidition: Prior to Final Site Plan approval, the applicant shall remove the existing area
drain in proposed drainage basin #2, This drainage basin is located along' the eastern
boundary of the parcel and appears according to proposed grading plan to be no longer
,Date Heceived:__J/Y;..?tf
. Planner: . AL, .
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necessary.
Condition: Prior to Final Site Plan approval, the applicant shall provide on the utility plan
sheets the size of existing sanitary an~ storn1 drainage lines both on site and off site of the
parcel in question, .
Condition: Prior to Final Site Plan approval, the applicant shall contact ODOT to verify the
outfall ofswale #1 into the existing ditch on ODOT right of way is acceptable,
. Condition: Prior to approval of the Final Plat, the applicant shall include a maintenance
document with provisions to ensure functionality of the three proposed vegetative swales.
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WATEROUALlTY
Finding: Under Federal regulation bfthe Clean Water Act (CW A), 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 Stonn Sewer
System (MS4) permit. A provision ofthispennit req'uires the City demonstrate effOlis to
reduce the pollution in urban storm water to the Maximum Extent Practicable (MEP),
j
Finding: Federal and Oregon Department of Envjrorunental Quality (ODEQ) rules,
require the City's MS4 plan address six "Minimum Control Measures." Minimum.
Control Measure 5, "Post-Construction Stonnwater Management for New Development
and Redevelopment," appliesto the proposed development. ,
Finding: Minimum Control Measure 5 requires the City of Springfield to develop,
I implement and enforce a program to ensure the reduction of pollutants in storm water
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 conlmunity.
'Finding: Minimum Control Measure 5 requires the City of Springfield use an,ordinance
or other regulatory mechanism to address post construction runoff from new and re,
/ development projects to the extent allowable under State law, Regulatory m'echanisms
used by the City include the Springfield Development Code (SDC), the City's
Engineering Design Standards and Procedures Manual (EDSPM) and the filture
Stormwater Facilities Master Plan (SFMP). '
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Finding: As required in Section 31:050 (5) of the SDC, "a development shall be required
to employ drainage managelnent practices approved by the Public Works Director and
consistent with Metro Plan policies and the Engineering Design Standards and
Procedures Manual."
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Finding: Section 3.02 of the City's EDSPM states the PubiC Works Department will
accept, as interim design standards for stormwater quality, water quality facilities
designed pursuant to the policies and procedures of either the City of Portland (BES), or
. . i
Date Received:-70y,7A:7#
Planner: ~L "
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the Clean Water Services ~CWS).
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Finding: Section 3.03.3.8 ofthe City's EDSPM states all public and private development
and redevelopment projects shall employ a' s'ystem <if 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 3,03AE of the
manual requires a minimum of 50 percent of the non-building rooftop impervious area on
a site shall be treated for storn1water quality improvement using vegetative methods.
Finding: To meet the requirements of the City's MS4 pennit, the Springfield
Development Code, and the City's EDSPM, the applicant has proposed three private
/ vegetative water quality swales. The private vegetative swales will be located along the
north and southeast boundaries of the parcel. Two separate grasses are specified for
planting in the vegetative swales at a rate of 20 lbs, per acre,
Finding: The vegetation proposed for use in the swales will serve as the primary pollutant
jemoval mechanism for the stonnwater 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: Prior to Final Plat approval, the applicantshall submit a seed mix for the three
private vegetative water quality swales and the public grassy swale/detentiori pond, The
seed mix shall meet the requirements of the City's interim design standards as required in
Section 3,02 of the EDSPM, The City of Portland stormwater management manual Section
5AA may be referenced for design of this seed mix. ~ ~ c".f~ ) r~ '
Condition: To ensure a fully functioning water quality system and meet objectives of
Spl~ngfield's MS4 pennit, the Springfield Development Code and the EDSPM, the
proposed private vegetative water quality swale shall be shall be fully vegetated with all
vegetation species established prior to approval of Final Plat. Alternatively, if this
condition cannot be met, the applicant shall provide and maintain additioniil interim
erosion control/water quality measures acceptable to the Public Works Department that
will suffice until such time as.the swale vegetation becomes fully establish~d,
, . . .
j PUBLIC STREETS. SIDEWALKS & IMPROVEMENT ARGEEMENTS .
Finding: Gateway Street and Game Fann road are fully improved streets with curb gutter
and sidewalk, so no improvements are anticipated by the applicant.
UTILITIES. EASEMENTS AND RIGHTS OF WAY,
Finding: Section 32,120 (3) of the Springfield Development Code requires' each
development area to be provided with a water system having sufficiently sized mains and
J lesser lines to furnish adequate supply to the development and sufficient a~cess for
maintenance, Springfield Utility Board coordinates the design ofthe water system within
Springfield city limits. The current plan proposal does not show locations or sizes of
proposed water lines.
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Finding: Section 32,120 (5) of the SDC r,equires applicants proposing developments
make an'angements 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, The minimum width for public utility easements adjacent to street rights of ways
shall be 7 feet. The minimum width for all other public utility easements shall be 14 feet.
"
Finding: The current plan depicts an existing water line that extends from'the existing
? water meters along the frontage" of parcel 1, south to the existing house ,on proposed
. 'parcel 2, Additionally, the electric, cable, and phone lines extend across parcel I and
, onto parcel 2 in a similar manner. The water and utility lines are not located in an
easement, nor are they proposed to be located in an easement.
7 Finding: The applicant has proposed a 7 foot public utility easements along the frontage
of C Street, satisfying Section 32,120 of the SDC. Additionally, a 20 foot iiTe,:ocable
private access and utility easement has been proposed over parcel I to benefit parcel 2,
OTHER PERMIT~ .
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
SYSTEMS DEVELOPMENT CHARGE:
Pay applicable Systelns Development Charges when building permits are issued for
developments within the City limits or within the Springfield Urban Growth Boundary.
(The cost relates to the amount of increase in impervious surface area, transportation trip'
rates, and plumbing fixture units. Some exceptions apply t9 Springfield Urban ,Growth
areas,) [Springfield Code Chapter II, Artidell] ,
Systems Development Charges (SDC's) will apply to the construction of buildings and
site improvements within the subject site, The Charges willbe based upon the rates in
effect at the time' of permit submittal for buildings or site improvements on each portion
or phase of the development.
SANITARY SEWER IN-LIEU-OF-ASSESSMENT CHARGE:
Pay a Sanitary Sewer In-Lieu-of-Assessment charge in addition to the regular connection
, ,
Date Received' 't1!~tJt
Planner: AL
fees if the property or portions of the property being developed have not previously been
assessed or otherwise participated in the cost o(a public sanitary sewer. Contact the
Engineering Division to detennine if In-Lieu-of-Assessment charge is applicable, (Ord
5584]
. PUBLIC INFRASTRUCTURE FEES:
It isthe re~ponsibility of the private developer to fund the public infrastructure.
OTHER CITY PERMITS:
Encroachment Permit or Sewer Hookup Pennit (working within right-of-way or public'
easements) example: new tap to the public stonn or sanitary sewer, or adjusting a
manhole. [The current rate is $130 for processing plus applicable fees and deposits]
Land & Drainage Alteration Permits (LDAP). [Contact the Springfield Public Works
Department @ 726-5849 for appropnate applications/requirements] .
ADDITIONAL PERMITS/APPROV ALS MAYBE NECESSARY:
.. Metropolitan Wastewater Management Commission (Pump statiori, sanitary
sewers 24 inches or larger)
. Lane County Facilities Permit (If the project is within Lane Count~ jurisdiction)
. Railroad (If the project crosses a railroad)
. Oregon Department of Transportation (If the project is within ODQT jurisdiction)
o Division of State Lands (Stonn water discharge, wetlands)
,. Oregon Department of Environmental Quality (Erosion control (5 acres or
greater), pump station, stonn water discharge, wetlands)
. . U.S, Anny Corps of Engineers (Stormwater:discharge, wetlands)
Date Received:. /J ~f/;-M6
Planner; Al ~;,