HomeMy WebLinkAboutPacket, Pre PLANNER 3/17/2011
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PRE.SUBMITTAl REC'D
MAR 1 7 2011
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. PRE-SUBMITTAL
DISTRIBUTION LIST:
Date Distributed: ,:S-/7-1/
t/ Dave Puent - Building
V Gilbert GordonlMelissa Fechtel- Fire
\/ Michael Liebler - Traffic
~ Matt Stouder- Public Works/Engineering
Chris MoorhetUl, SU~
Planner S{t..Ll.Je..-
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City of Springfield
Development Services Department
225 Fifth Street
Springfield, OR 97477
541-725-3753 Phone
541-726-3689 Fax
SiP~J~~L;ij
~EGON
Pre-Submittal Meeting
Case Number Assigned:
PREll-OOOOS
Date Submitted:
03/1712011
'"
Project Name:
Project Description:
Hiatt Estates 10th & Q St (4) duplexeslS units
Pre-Submittal for Tentative Site Plan Review for 4 duplex housing development
at the NW corner of! Oth and Q Streets
,
Assessor's & Tax Lot #:
Pre-Submittal Site Plan Tentative
o Vacant - Q and 10th ST
1703261300102
Application Type:
Job Address:
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DISCLAIMER: Applications will not be exempt from Develop~ent Code or procedural amendments that may occur between the
time of the Pre-Submittal Meeting and Submittal of the Application for Development Review. Please contact our office at
541-726-3753 with any questions or concerns.
A Planner will be assigned the following business day and will contact you to.coofirm the meeting date and time.
l'Rffi /-Doo01
PRE-SUBMITTAL REC'D
MAR 1 7 2011
C:ltempIPLJRM_PRESUB {DD5D89Il5-FBAE-4479-BF7D-l BFSF612F079).r]lt
3/17/2011
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Pre-Submittal Meeting
Develop~ent Services Department
Room 615/616
PRE-SUBMITTAL ~ETING DATE: Friday, March 25, 2011
1. PRE-SUBMITTAL MTG #PRE11-00008 (Site Plan Tentative) - mATT $346
Assessor's Map: 17-03-26-13 TL 102
Address: Vacant - comer of 10TH & Q Street
Existing Use: Vacant
The applicant submitted plans to construct 4 duplexes/8 units to be known as Hiatt Estates.
Meeting Date/Time: Friday, March 25, 201111:00 - noon DSD 616
Planner: Steve Hopkins
PRE-SUBMITTAL REC'D
MAR 1 7 2011
[City of Springfield
Development Services Department
225 Fifth Street
Springfield, OR 97477
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Site Plan Review
A licant Name: Michael Hiatt
Phone: 514-915-3569
Fax: 541-342-8251
Address:
3283 J
"~"'~"""', ,'i'llo;<''''~' 1.."- ,'"_H "'...:_:c.-'I'<t'.',......i~...',...; h" _,~" :.....,,",''"'.,...,:...:'d ~,~ ,....
. '~H""'.'A~'" .~..
A licant's Re . Lane Branch or n~C-v\
Inc.
Phone: 541-746-0637
Address:
Fax:
541-746-0389
310 5th Street S
,'""-"".',',,,..,,
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Owner: Bernard Hiatt
Phone: , 541-726-1382
Com an
Fax:
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Address:
ASSESSOR'S MAP NO: 17-03-26-13
TAX LOT NO S : 102
'Address: Located at the northwest corner of the intersection at 10th Street and Street.
0.58
Acres IZl S uare Feet 0
Pro osed Name of Pro"ect: Hiatt Estates
_"_"'~;.,_.'.=.~.'. .'" ,....-.', ..... .,__,...",.....,."'..,. ~,,_L.""'""_H'''''''...:~'__:,.;,;......,'''',..-:_.,,'.........'''''~.,~,..I''-<=."''--'h.L' ._,~ .'.'~h-:...r"l'-..".......lr..''''',
''''_''''''..-.".-.',......,,'"'''-=~,.,... ,., .. ,,,'" . ~r..' ...., '.. . "+J, .....,.
Description of If you are filling in this form by hand, please attach your proposal description to this application,
Pro osal: 4 Du lexes totalin to 8 Dwellin Units'
Existin Use: Existin Lot is currentl vacant
New 1m ervious Surface Covera e 1ncludin . Gross Floor Area
Si natures: Please si our name and date'in the a
14 518 sf
. -.
*. . .
, ...
Pre-Sub Case No.:~'
?,
- C;C{:(', r" Date:
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Si ns:
Associated A lications:
Reviewed b
Case No.:
Date:
Reviewed b
A Iication Fee:
G.u0
J~&, 6V
Technical Fee:
r--
TOTAL FEES: $
P
Revised 11/19/09
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1 of 10
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Owner Signatures
This application form is used for both the required pre-submittal- meeting and subsequent
complete application submittal. Owner signatures are required at both stages in the application
process.
An application without the Owner's original signature will not be accepted.
Pre-Submittal
The undersigned acknowledges that the information in this application is correct and
accurate for scheduling of the Pre- Submittal Meeting. If the applicant is not the
owner, the owner hereby grants permission for the applicant to act in his/her behalf.
I/we do hereby acknowledge that I/we are legally responsible for all statutory
timelines, information, requests and requirements conveyed to my representative.
Owner: :' _ ~ I1fJ (:zlf Date: 3 - {i- I \
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Print
Submittal
I represent this application to be complete for submittal to the City. Consistent with the completeness check
performed on this application at the Pre-Submittal Meeting, I affirm the information identified by the City as
necessary for processing the application is provided herein or the information will not be provided if not otherwise
contained within the submittal, and the City may begin processing the application with the information as
submitted. This statement serves as written notice pursual")t to the requirements of ORS 227.178 pertaining to a
complete application.
owne:a ~ //7J (41
-t::~ture "'fyr.
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Print
Date:
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PRE.SUBMITTAL RECIO
MAR 1 7 2011
Revised 11/19/09
2 of 10
spr.:.map Page i of 1
PRE11~00008 pretubmittal Mtg (Site Tent!ve Plan) Hiatt Estates
17 -03-26-13 TL 102
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PRE-SUBMITTAL REC'D
MAR 1 7 2011
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WRITTEN NARRATIVE
FOR
HIATT ESTATES DEVELOPMENT
17-03-26-13 TL 102
This Site Plan Review Submittal application is a proposal to develop the vacant lot at the
. northwest comer of 10th Street and Q Street (Map 17-03-26-13, Tax Lot 102) into multi-family
dwellings. Currently, the lot is vacant with no existing structures on site. The total site area is
0.58 acres and is generally flat with vegetated ground cover consisting predominately of grass.
There is a 60" filbert cluster in the southwest comer of the lot.
According to the Soil 9urvev of Lane County. by the Natural Resource Conservation Service, the
soils on site consist of Salem (119) and Coburg (32). Salem soil is moderately well draining
(Hydrologic Group: B) with a depth to high water table greater than 6 feet. Coburg Soil has
moderately slow permeability where the hazard of water erosion is slight.
The new development proposes the construction of 4 new duplexes or 8 dwellings along a
private concrete access drive aisle. Each dwelling will have its own garage and driveway. All
units will have individual utility services and meters. A 6" sanitary pipe is to be constructed
along the private drive to be used as a service lateral for this development.
Stormwater management will be met by installing pervious concrete pavers on half of the non-
building rooftop impervious surfaces. The remaining non-building rooftop stormwater runoff
will be collected by a 2 chamber steel catch basin with an oil and grease filter. This catch basin
will connect with the roof downspout lateral running through the project and convey to the 21"
stormwater main on 10th Street.
All additional Site Plan Review Submittal items are included with this packet.
PRE-SUBMITTAL REC'O
MAR 1 7 2011
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ORDINANCE. NO. 6160
(SPECIAL)
,.Ill
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AN ORDfNANCE V ACA TfNG A I O-FOOT WIDE PORTION OF Q STREET fN THE CITY OF
SPRfNGFIELD, LANE COUNTY OREGON '
WHEREAS, the Springfield Common Council has declared its intention to vacate a IO-foot wide portion of
Q Street in the CitY of Springfield; and
WHEREAS, the application for right-of-w~y vacation was submitted in confonnance with the provisions of
ORS 27] .OSO et. seq., and with the provisions of Article 9 V ACA nONS of the Springfield Development
Code; and
WHEREAS, the Sprin~field Planning Commission conducted a public hearing on this proposed vacation on
February 7, 2006, and the testimony, findings and conclusions of that meeting have been considered by the
City Council; and
WHEREAS, the findings and testimony submitted by the applicant and those in support of this right-of-way
vacation satisfY the criteria of approval for vacations found in Section 9.060 of the Springfield Development
Code; and
WHEREAS, such vacation is in the best interest of the City in carrying out its plans 'and programs for the
general development of the City; and
. WHEREAS, lawful notice of the proposed vacation was published and posted; and
WHEREAS, the Springfield Common Council met in Council Chambers, at 225 Fifth Street, on Tuesday,
the 21st day of February, 2006 (First Reading) and on March 6th (Second Reading), at the hour of7:00
p.m., to hear any objections to the proposed vacation and -<L... persons appeared to object;
NOW, THEREFORE, THE CITY OF SPRINGFIELD DOES ORDAfN, AS FOLLOWS:
Section 1: The Council finds that the legal notice ofthe hearing was lawfully published and posted;
that -..lL objections were made at the vacation hearing held; that the public interest will not be impaired by
the vacation of this public right-of-way, and that vacation of said right-of-way will be in the best interest of
the public and increase the benefit of the property involved.
Section 2: The public right of way in the City of Springfield, as described in Attachment A of this
Ordinance, is declared to be vacated.
Section 3: The findings adopted by the City Coul)cil in support onhis right-of-way vacation, are
hereby made part of this ordinance by reference. ,
Section 4: The City Recorder is directed to file certified copies of this ordinance with the Lane County
Clerk, Lane County Assessor, and Lane County Surveyor.
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.ORDlNANCE 6160
PAGE 1
PRE.SUBMITIAL RECIO
. MAR 1 7 2.011
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. Section 5: This right-of-way vacation is subject to and explicitly reserves easement rights for any
existing sewer, water main, gas main, conduit of any kind, pole, structure, or thing used for or intended
for public utilities or public service. The owner of any such utility or thing is hereby reserved the right to
access, maintain, continue, repair, reconstruct, renew, replace, rebuild and enlarge any and all existing
facilities.
Section 6: It is further a condition of this vacation that nothing herein contained shall cause or
require the removal or abandorunent of any sewer, water main, gas main, conduit or any kind, pole or
thing used or intended for any public service. The right is.hereby reserved for the owner of any such
utility or thing to access, maintain, continue, repair, reconstruct, renew, replace, rebuild and enlarge any
and all such things under existing or future easements.
ADOPTED by'llie Common Council of the City of Springfield this 6th day of March, 2006 by a
vote of ~ for and ~ against.
APPROVED by the Mayor of the City ofSpri
arch, 2006.
ATTEST:
(0~~~
DATED this 1.f:f day of /.4 ar'C-k
.: - :'." .0. "..'~......rlol~'~..
\ .' <=4'"\~_~ \-~\'"
.~\ l-i\ro~ .~
..: -.~'C;[ 0:= CITY jlTTORNEY
p~
(Position)
City of Springfield
State of Oregon )
) ss.
County of Lane )
This instrument' was acknowledged before me on ---1jtLrch 1) (JOO j., by
51d.ne!:i M). leikeR ).,{~or or;. +/LR.. 6.:t:u>af' SPrfr'/ghdd
. (Name), ds (Position) ofth~ City f Springfield. --I I
NOT~;~C~ON
My commission expires:
11- ).;}. d{JD ~
PRE-SUBMITTAL REC'O
MAR 1 7 2011
ORDINANCE 6160
Page 2
. OFFICIAL SEAL
AMY LSOWA
. , NOTARY PUBLIC. OREGON
\" .../ COMMISSION NO. 397942
. MY COMMISSION EXPIRES NOV.22, 2009
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LEGAL DESCRIPTION
Public Right-of-Way Vacation
. (A Portion of 'Q' Street)
~ap 17-03-26-13
Job No. 04-6005
A parcel oflimd lying in the Northeast Quarter of Section 26, Township 17 South, Range 3 West
of the Willamette ~eridian, Springfield, Lane County, Oregon, and being more particularly
described as follows:
Beginning at a point on the intersection of the Westerly right-of-way line of loth Street and the
Northerly rig~t-of-wax.line of'Q' Street as dedicated by the Plat of Fuchsia Gardens, as platted
and recorded In Book 19,. Page 14, Lane County Oregon Plat Records, saId pomt bemg'East,
1283.69 feet and North, 40.00 feet from the Southwest corner of the William C. Spencer
Donation Land Claim No. 50, Township 17 South, Range 3 West of the Willarnette Meridian;
run thence West, 194.28 feet along said Northerly right-of-way line of 'Q' Street as dedicated by
said Plat; thence leaving said Northerly right-of-way line run South, 10.00 feet;.thence East,
194.28 feet; thence North, 10.00 feet to the Point of Beginning, in Springfield, Lane County,
Oregon.
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PRE-SUBMITTAL REC'D
. MAR 1 7 2011
Ordinance No. 6160
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STORMWATER Mi\NAGEMENT
PLAN AND DRAINAGE STUDY
FOR
Hiatt Estates
10th Street and Q Street
" Springfield, OR
~...,..:.,,"",..,... '''''''''''''''..;0'-'' .
March 11, 2011
'-
Prepared For:
Michael Hiatt
3283 JayhawkCourt
Eugene, Oregon 97405
Branch Engineering, Inc.
310 5th Street
Springfield, OR 97477
Phone (541) 746-0637
Fax (541) 746-0389
.. ".''<'':."C''''''=
~ Bra~ch Engineering, Inc.
Branch Project # 11-017
PRf-SUBMIITAl REC'D .
MAR 1 7 2011
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Storm Drainage Evaluation
10" Street and Q Street--Hia"
STORM DRAINAGE EVALUATION
Hiatt Estates
Springfield, OREGON
This evaluation was prepared to summarize the drainage system proposed for the Hiatt
Estates development. The site is located at the northwest corner of the intersection at lOth
Street and Q Street in Springfield, Oregon. Half of the stormwater will be treated on site
by using pervious pavement. The other half of the stormwater will be graded to a catch
basin and be filtered before entering the city's stormwater conveyance system.
Existing Conditions
The site currently ltas no existing structures. The total site area is 0.58 acres and is
generally flat with vegetated ground cover consisting predominately of grass. For
additional information on the utilities and services just off site, see the Existing
Conditions Plan.
According to the Soil Survey of Lane County, by the Natural Resource Conservation
Service, the soils on site consist of Salem (119) and Coburg (32). Salem soil is
moderately well draining (Hydrologic Group: B) with a depth to high water table greater
than 6 feet. Coburg Soil has moderately slow permeability where the hazard of water
erosion is slight.
Proposed Drainage System
The proposed development will have 0.33 acres of impervious area and 0.06 acres of
pervious concrete. The runoff from the roofs will connect with the storm water lateral
along the private drive and pipe to the 21" main along 1 Oth Street. -Runoff from the
driveways and the outside 2.5' of the private access street will be treated and infiltrated
by using pervious pavers. All remaining stormwater runoff from the street will be
collected by a catch basin that will have removable oil and grease filter. This catch basin
will connect into the stormwater lateral along the private drive.
Table 1 below shows all impervious and pervious pavement areas and how they will be
treated and conveyed.
Ta e 1: rODosed tormwater iystem
Impervious Surface Area Treated (yes/no) Infiltrated/Connect to City
fB\~1jf7Ar~a~~~~,{:~;~<:~f:'. ~. .' ,~. .' ~,. ,~ . '. , No .- :~,;'-:,;~~i.~3_Cd~ne.c.t~o~~!'W~~t ';~.~.:
.10464 :,;;'-;: " h
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Private Drive (Impervious) 2570 Yes Infiltrate/Connect to City
'~;~""~""'O;''''-':'~''',f"....~#C'-~;.-t . c. .~, ". ....'HO'"".-,1i:t. Yes .~ i" \':; :('''''!:;:",'; \f;:7'~.:r-~'-:''''~;1l-';''~f'::;1.~'':'''~''<_,
~Poriilate'Drive;(~ervious r. -..0990' ,', - ,~, -<-' i:Alnflltrate ;','!!!7;:; ;',' ',::;',--
Driveways (Pervious) 1880 Yes Infiltrate
.::"..~:~,'{ ,J' c.';.: I ," d . 744-_, -'.'-,' Yes ::'Ihfi itrate i-t :' ~;:..: >:
~Corlcrete'-WaIKs , " ... '. ". .' .. ~. -- ..". ,
Concrete Patios 640 No .
.,.:c-.,.:......,. 17288.. --' , ".g._:
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PRE-SUBMITTAL REC'D
MAR 1 7 2011
Branch Engineering, Inc. - Page 1
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Storm Drainage (valuation
10" Slreeland Q Slreel --Hia"
Stormwater Quality
Per City of Springfield Stormwater Design Standards section "3.03.6 Vegetative
Treatment Requirements", a "minimum of 50% of the non-building rooftop impervious
area on a site shall be treated for stormwater quality improvement using vegetative
methods." For this reason stormwater quality will be met by using pervious pavement for
half of the drivable surfaces and a 2-chamger steel catch basin with a removable oil and
grease filter for the other half.
Pervious pavers are an approved treatment option and will be used on all driveways and
the outside 2.5' of the Private Access Road. Pervious pavers provide treatment in the
removal of pollutants such as hydrocarbons, sediment, and metals and allow for the quick
removal of stormw\1ter through void openings. Pervious pavement also helps promote
groundwater recharge. Attached is the Design Model of the Pervious Pavers to be used.
In order to detain additional runoff from the site, there will be a 5'x20' pervious
pavement island around the 2-chamber steel catch. This will provide detention for some
of the runoff before entering the 2-chamber steel catch basin which will provide pre-
treatment for the remaining pavement areas as required by City of Springfield
Stormwater Design Standards section "3.03.5 Parking Lots/Paved Areas." The use of the
2-chamber Steel catch basin with an oil and grease filter for pretreatment is a common
practice for the City of Springfield.
Stormwater Runoff Analysis
For a conservative analysis of the storm water runoff from the site, we will assume no
detention from the pervious pavement island in the Private Access Drive. Therefore the
total impervious area will be 0.30 acres which includes the impervious roadway and the
roofs from the site. The following Rational Method calculations show the approximate
maximum runoff flow for the 25 year, 24-hour storm event. In order to use the Rational .
. .
method an assumed method was used for finding an hourly flow.
PRE-SUBMITTAL REC'D
MAR 1 7 2011'
Branch Engineering, Inc. - Page 2
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Storm Drainage Evaluation .
10" Slreel and Q Slreel--Hia"
From Standard Type IA Hydrograph
2s-Year, 24-Hr Storm
4.8 in
*per: City of Springfield Standards 4.03.3 Water Quality Design Storm
(EDSP April, 2006)
In a Type IA storm event, the max Percent Rainfall in a 10 minute interval is 5.4% near the end of
the 7th Hour.
(0.054*4.8) =
0.2s92.in/l0min in/l0min'
1.56'in/hr
RATIONAL METHOD
Intensity= 1.56 in/hr
Runoff Coefficients ~C
Pavement &'Roofs
Lawns
0.9
0.17
Areas u...A (acres)
Pavement 0.3
.." ......
Lawns 0
. Total 0.3
Composite C =
sUM{Cindividual areas}x(Aindividual areas}
Alotal Area
Composite C =
0.9
Q( cfs)=C( -) *i (in/hr)' A( acres)
Comp C=
Intensity=
Area=
Q=
0.9
1.56 in/hr
O.3.Acres
0.4212 cfs
From this analysis, the maximum runoff flow from the site for the 25-year, 24 hour storm
event is 0.42 cfs entering the 21" storm main on 1 Olh Street. . .
PRE.SUBMllTAl REC'O
MAR 1 7 2011
Branch Engineering, Inc. - Page 3
ICPI.<'~
C\'TUIllO:lo.:I:,,{;{^}:"CRI!l~~:':J
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Site Information
Laver Information
Paving Layer
Base Material
Subbase Material
Subgrade Material
Structural Desio" Information
HvdroloQical DesiQn Information
. ..
Permeable Interlocking Concrete Pavements
Structural and Hydrological Design Inputs
Design Title: Unknown
Pavement Length
Pavement Width
Pavement Area
Catchment Area
179ft
15.5 ft
2,775ft'
3518.5 ft' (Avg CN=73.41)
Structural Coefficient
Structural Number
Thickness
ASTM No 57 Stone
Structural Coefficient
Structural Number
Thickness
Porosity
" Void Ratio
Penmeability
ASTM No 2 Stone
Structural Coefficient
Structural Number
Thickness
Porosity
Void Ratio
Penmeability
.3
1.5 in
5.125 in
0.05
0.2 in
4.0 in
0.288
0.4
782.442 in/hr
,
0.05
0.6 in
12.0 in
0.318
0.47
. 31,050.889 in/hr
Subgrade Strength
Porosity
. Void Ratio
Penmeability
21000.0 psi
0.342
0.52
0.023 in/hr
Average Annual Daily Traffic
Design ESALs
Design Structurai Number
Pavement Structural Number
Structurally Adequate
30,000
1.14
2.3
Yes
Rainfall Location
Stonm Type
Springfield, OR
IA
Stonm Return Period 24-hour Rainfall Satisfies Infiltration Satisfies Storage Satisfies Storage
(Years) I ntensity in Capacity Goal Capacity
2 3.3 Yes Yes Yes
25 4.8 Yes Yes Yes
Storage goal represents 85 percent of maximum water storage capacity
PRE.SUBMITrAl REC'O
MAR 1 7 2011
Page 1/1
2/28/2011 12:40:11 PM
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Permeable Interlocking Concrete Pavements
Structural and Hydrological Design Inputs
Design Title: Unknown
Iep <"'.,
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I'AVE\I""-I" 1,...'nTn;TE~V-
Hvdroloaical Desion Results
Equivalent Design Storm
Storage Goal 25 year storm
Storage Capacity 25 year storm
Combined Site Hvdrolooical Characteristics for Permeable and Non-Permeable Areas
Site Area 3518.5 It'
Average Curve Number 73.4 1
Average Rational C Value
Equivalent Design $tOtm with Runoff
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MAR 1 7 2011
Page 1/3 .
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PRE.SUBMITTAL REC'D
MAR 1 7 2011
Page 2/3
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Page 313 .
PRE.SUBMITIAL REC'D
MAR 1 72011
212812011 12:40:11 PM
. ,
02/25/2011 15:28 FAX 541 7~tIIo21
CITY OF SPRINGFIELD.
IilJ 001
PUBLIC WORKS DEPARTMENT
ADMINISTRA nON
ENGINEERING DIVISION
'ENVIRONMENTAL SERVICES DIVISION
MAINTENANCE DIVISION
TRANSPORTA nON DIVISION
TECHNICAL SERVICES DIVISION
ZZ5 FIFTH S.TREE7
SPRINGFIELD. OR 97477
www.ci.spring!ield.or.vsldaptyw.htm
www.cl.springfield.or.us
, STORMW A TER MANAGEMENT SYSTEM SCOPE OF WORK
..,..-_____________ (Area below thi:;/inefllled out by Applicant) --------
(Please return 10 Matt Stouder @ City of Springfield Public Works Engineering; Fax #' 736"102 I. Phone # 736-1035)
Project Name: J:J :..tI 651vr4"5
Consultant: J),.4nGh &') ;"'n,.....)
Land Uses: p.''7.',,)rn hc.'1
Project Size (Acres):
Approx. Impervious Area:
I.....;." D~.rip.'"'
Drainage Proposal (Public cOIUlections. pipe sizes and layout. etc.):
Date:
Phone #:
Fax #:
Email:
Approx. Pervious Area:
;)-,J.,5-?oll
51-1- 71r.-06~ 7
Proposed Stormwater Best Management Practices (BMP's):
__________ (Area below this line filled Ollt by the City and Re/umed to tl,e Applicant) ---.--------
(At a minimum, all boxes checked try the Ci/yon ihe front and buck of/his sheet shall be submi/ledfor an application to be complete
for submit/ai, although other requirements may be necessary.)
Drainage Study TVlle (EDSP Section 4.03.2): (Note. UH lllav be substituted for Rational Method)
r;q, Small Site Study - (use Rational Method for calculations)
o Mid-Level Development Study - (use Unit Hydrogr.ph Method for calculations)
o Full Drainage Development Study - (use Unit Hydrograph Method for calculations)
Environmental Considerations:
[j WeJlheadProtectionZone: W-2V'7r 0 HillsideDevelopment: !JIll
o Setback Requirements (Wetland, Riparian): f1) A 0 Floodway/Floodplain: )V lit
Downstream AD.alvsis: -fVr; AIl~~5i; ('(!//;",,1 r F p'''';'''':, '>"'fl&'~5 '" -/: ~-.Led
",iwS I el, s",~s.s cd {p r",du,e r,-,YlO {f Iv"...., d.".c./.p"'c. f7
o N/A . . A < pre 'I . ., PRE-SUBMITTAL REC'D
o Flow lme for startmg water surface elcvatIon:
o Design HGL to use for starting water surface elevation: MAl< I '1 lOll
o Manhole/Junction to take analysis to:
ADMINISTRA nON I TECHNICAL SERVICES I ENGINEERING: (541)726-3753 . FAX (541) 736-1 021
MAINTENANCE.' (541)726-3761 . FAX (541)726-3621 TRANSPORTATION.' (541)726-3753 . FAX (541)726-3781
........./1.-.-........--..,...,....., ......-I""\''',..r-~. 'CAof\7"'~ "~('JA _ c.:.^VIf:.A117"~ .,~no
". ,
02/25/2011 15:28 FAX 541 7j4lt021
CITY OF SPRINGFIELD.
141002
COMPLETE STUDY ITEMS
" * Based upon the information provided by rhe applicant on the front 01 this sheet, the following list represents a minimum of what is
neededfor an application ro be complete for submittal with respect to drainage: however. this list should not be used in lieu of the
Springfield Development Code (SDC) or the City's Engineering Design Standards and Procedures (EDSP). Note that compliance
wirh rhese requirements does not constitute site approval. Additional information may be required which is site specific.
General Study Requirements (EDSP Section 4.03)
Req'd N/A
00 D The drainage study shall be prepared by a Professional Civil Engineer licensed in the state of Oregon.
~ D A complete drainage study shall be submitted ,if the development is to be I~rger tban one acre, creale mOte than 5000 square
feet of new impervious surface, generate peak flows in excess of 0.5 cfs, Ot modify an existing system with 0.5 cfs or
greater.
IB D Calculations showing sys~m capacity fOT a 2-year stonn event and overflow effects of a 25-year storm cvent.
Interim Des;un StandardslWater Quality (EDSP Chapter 3)
~;1.-. tzl D S;;;'mit supporting calculations for the method of stOtmWllter treatment to be implemented.
itI D All non-building rooftop impervious surfaces shall be pre-treated for stormwater quality. Howcver, a minimum of 50% of
the non-building rooftop impcrvious sulface shall be treated by vegetated methods.
g] D Where a stotmwater tteatmC'Tlt or infiltration swale will be used, specify which typO and submit calculations for sizing,
velocity, and flow. Also show bottom and side slopes, distance from structures and lot lines, as well as specifying the seed
mixture to .be used. .
ID D For swales serving an lIrea of less tban 15,000 square feet, a simplified design approach may be followed as specified by the
Bureau,ofEnvironmental Services (BES). Calculations, sizing and the area the swate serves .shall be included.
o ~ Swales which serve lIreas greater tban 15,000 square feet shall submit calculations aDd sizing requirements in accordance
with Chapter 3 ofthe City ofl>ortland StOlTIlWater Manual (BES).
KI D All building rooftop mounted equipment, or other fluid containiD'g equipment located outside of the building, shall
be provided with secondary containmcnt or weather reSistant enclosure.
Rcview of Downstream System (EDSP Section 4.03.4.C)
D III A downstream drainage analysis shall be submitted for developments proposing to construct more than 5000 square, feet of
new imperviousness surface. Oo-site drainage shall be govemed by the Oregon Plumbing Specialty Code (OPSe).
D 119 The applicant shall include eleVlltions of the HGL and flow lines for both city and private systems where applicable.
Design of Storm Systems (EDSP Section 4.04)
~ D Easure flow lines, slopes, rim elevations, pipe type and sizes are clearly indicated on the plan sel.
00 D Minimum pipe cover shall be I g inches for reinforced pipe aad 36 ,inches for plain concrete and plastic pipe materials, or .
proper engineering calculations shall be provided when Jess. The cover shall be sufficieot to support an 80,000 lb load
withom failure of the pipe structure.
D Manning's "n" values for pipes shalJ be consistent with Table 4.1 of the EDSP. All stonn pipes shall be designed to achicve
a minimum velocity of three feet per second at 0.5 part full based on Table 4'1 as well.
1'J
V~1.
t11 OtherlMisc
- 1'l 0 If a detention facility is required, it shall be designed to capture runoff so the discharge from the site after development does
not exceed pre.development conditions or available capacity, based on a 2- through 25,year, 24 hour storm. (EDSP Section
4.10.1) - :.r~,v""" f""'''''o/' C4n be u~eJ i" ;,e.v elf c!M-<7Ifi01)
ys D If a dIywell (UIe) is proposed, it shall not receive runoff from any surface wlo being treated by one or more BMPs, with the
exception of residential building roofs (EDSP Section 3.03 .4.A). Additional provisions apply to this as required by the
DEQ. Refer to the website: www.deQ.slate.oLus/WQ/2Toundwaluichome.hcm for more information.
~ D UIC's may not be 10, cated within any easement, and must be no closer than 10 feet fromanY~~f 'l!;,11Toperty
line (EDSP Section 3034B). . VOIVIlIIf\ll<tC'D
. MAR 1 7 2011
* Thisfarm shall be included as an attachment, inside rhefront cover, ofrhe stormwater study