HomeMy WebLinkAboutApplication APPLICANT 6/18/2010
City of Springfield
Development Services Department
225 Fifth Street
Springfield, OR 97477 .
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Land Division Tentative Plan
Partition, Subdivision
A Iicant Name: Gre Larkin Phone: 760-7881
Com an : Back Porch Pro erties LLC Fax:
Address: P.O. Box 832 Sweet Home, OR 97386
A licant's Re . Scott Morris Phone: 302-9790
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Com an : Olson & Morris Fax: 541 485-3253
Address: 380 Street, Ste 200 S rin field OR 97477
Owner: Same as A licant
Phone:
Com an
Address:
Fax:
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ASSESSOR'S MAP NO: 17-02-32-33
TAX LOT NO S 1701
327 South 42nd Street
1.0
Acres ~ S uare Feet D
Pro osed Name of Subdivision: Back Porch Pro erties Cluster Subdivision
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Description of If you are filling in this form by hand, please attach your proposal description to this application.
Pro osal:
Existin Use: Vacant-
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Associated A lications:
2010 -
l\)IM)
Si ns: -
Pre-Sub Case No.: .
D_ D~\J09
Date: (,
Reviewed b
JUN 1 8 2010
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Case No.:
A lication Fee: $
Lf(P Q9-
3Y--fom:?-
Date:
Technical Fee: $
TOTAL FEES: $
PROJECT NUMBER: f(\(.
'~(,,- Obu1
Revised 11.19.09
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Land Division Tentative SUbmittal Requirements Checklist
NOTE:
. ALL of the following items MUST be submitted for BOTH Pre-Submittal and Submittal.
. If you feel an item on the list below does not apply to your specific application, please
state the reason why and attach the explanation to this form.
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Application Fee - refer to the Development Code Fee Schedule for the appropriate fee
calculation formula. A copy of the fee schedule is available at the Development Services
Department. Any applicable application, technology, and postage fees are collected at the
pre-submittal and submittal stages.
land Division Tentative Application Form
Narrative explaining the purpose of the proposed development, the existing use of the
property, and any additional information that may have a bearing in determining the
action to be taken.
Copy of the Deed
Copy of a Preliminary Title Report issued within the past 30 days documenting
ownership and listing all encumbrances.
Copy of the Land Division Plan Reduced to 8'h"x 11", which will be mailed as part of
the required neighboring property notification packet.
Right-of-Way Approach Permit Application provided where the property has frontage
on an Oregon Department of Transportation (ODOT) facility.
Three (3) Copies of the Stormwater Management System Study with Completed
Storm water Scoping Sheet Attached - The plan, supporting calculations, and
documentation must be consistent with the Engineering Design Standards and Procedures
Manual.
Three (3) Copies of the Traffic Impact Study prepared by a Traffic Engineer in
accordance with SDC 4.2-105 A.4. Traffic Impact Studies (TIS) allow the City to analyze
and evaluate the traffic impacts and mitigation of a development on the City's
transportation system. In general, a TIS must explain how the traffic from a given
development affects the transportation system in terms of safety, traffic operations,
access and mobility, and immediate and adjoining street systems. A TIS must also
address, if needed, City, metro plan and state land use and transportation policies and
objectives.
Seven (7) Copies of the Following Plan Sets for Pre-Submittal OR
Eighteen (18) Copies of the Following Plan Sets for Submittal .
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All of the following plans must include the scale appropriate to the area involved
and sufficient to show detail of the plan and related data, north arrow, and date of
preparation.
All plan sets must be folded to 81f2" by 11" and bound by rubber bands.
a. Site Assessment of Existing Conditions PRE.SUBMllTAL REC'D
~ Prepared by an Oregon licensed Landscape Architect or Engineer JUN 1 8 2010
~ Vicinity Map
Revised 11.19.09
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~The name, location, and dimensions of all existing site features including buildings, "
curb cuts, trees, and impervious surface areas, clearly indicating what is remaining and
what is being removed. For existing structures to remain, also indicate present use
ahd required setbacks from proposed property lines.
~The name, location, dimensions, direction of flow and top of bank of all watercourses
and required riparian setback that are shown on the Water Quality Limited Watercourse
Map on file in the Development Services Department .
gj The 100-year floodplain and floodway boundaries on the site, as specified in the latest
adopted FEMA Flood Insurance Rate Maps or FEMA approved Letter of Map Amendment
or Letter of Map Revision
~ The Time of Travel Zones, as specified in SDC 3.3-200 and delineated on the Wellhead
Protection Areas Map on file in the Development Services Department
~ Physical features including, but not limited to trees 5" in diameter or greater when
measured 4 V2 feet above the ground, significant clusters of trees and shrubs, riparian
areas, wetlands and rock outcroppings
~ Soil types and water table information as mapped and specified in the Soils Survey of
Lane County. A Geotechnical Report prepared by an Engineer must be submitted
concurrently if the Soils Survey indicates the proposed development area has unstable
soils and/or a high water table
b. Land Division Tentative Plan
]:8 Prepared by an Oregon licensed Land Surveyor
~ City boundaries, the Urban Growth Boundary, and any special service district
boundaries or railroad right-of-way which cross or abut the proposed land division
'gJ Location and width of all existing and proposed easements on and abutting the
proposed land division "
IX! Boundaries of entire area owned by the property owner, of which the proposed land
division is a part, as well as dimensions and size of each parcel and the approximate
dimensions of each building site indicating the top and toe of cut and fill slopes to scale
~ Location and type of existing and proposed street lighting, including type, height, and
area of illumination "
~ Location, widths, conditions, and names of all existing and proposed streets, alleys,
dedications or other right-of-ways within or adjacent to the proposed land division.
Proposed streets should also include approximate radius of curves and grades and
relationship to any projected streets as shown on the Metro Plan, TransPlan,"
Conceptual Development Plan, or Conceptual Local Street Map.
IX Location of existing and required traffic control devices, fire hydrants, power poles,
transformers, neighborhood mailbox units and similar public facilities
~ Location and dimensions of existing and proposed driveways
IJQ Location of existing and proposed transit facilities
cx;I Location and width of all existing and proposed sidewalks, sidewalk ramps, pedestrian
access ways and bike trails
" ~ Location, size and type of plantings and street tre"es in any reqpR~~SlJB~mlA[r~tC'D
JUN 1 8 2010
Revised 11.19.09
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~ Location and'size o!isting and proposed utilities on a! adjacent to the site including
sanitary sewer mains, stormwater management systems, water mains, power, gas,
telephone, and cable TV. Indicate the proposed connection points
~ The locations of all areas to be dedicated or reserved for public use, with the purpose,
condition or limitations of the reservations clearly indicated
~ Future Development Plan where phasing or large lots/parcels are proposed as specified
in SDC 5.12-120 E.
c. Stormwater Management Plan
IZf Prepared by an Oregon licensed Civil Engineer
:J8I Planting plan prepared by an Oregon licensed Landscape Architect where plants are
proposed as part of the stormwater management system
2SI Roof drainage patterns and discharge locations
~ Pervious and impervious area drainage patterns
~ The size and location of stormwater management systems components, including but
not limited to: drain lines, catch basins, dry wells and/or detention ponds; stormwater
quality measures; and natural drainageways to be retained
. !XI Existing and proposed spot elevations and contours lines drawn at 1 foot intervals (for
land with a slope over 10 percent, the contour lines may be at 5 foot intervals)
~ Amount of proposed cut and fill
D Additional Materials That May be Required
IT IS THE APPLICANT'S RESPONSIBILITY TO DETERMINE IF ADDITIONAL
STANDARDS/APPLICATIONS APPLY TO THE PROPOSED DEVELOPMENT. THE
APPLICANT SHOULD CONSIDER UTILIZING PRE-DEVELOPMENT MEETINGS AS
DISCUSSED IN SDC 5.1-120:
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Revised 11.19.09
Proposed deed restrictions and a draft of any Homeowner's Association Agreement
Additional plans and documentation for submittal of a Cluster Subdivision proposal
as specified in SDC 3.2-230
Riparian Area Protection Report for properties located within 150 feet of the top of
bank of any Water Quality Limited Watercourses (WQLW) or within ioo feet of the
top of bank of any direct tributaries of WQLW
A Geotechnical Report prepared by an engineer must be submitted concurrently if
there are unstable soils and/or a high water table present
Where the development area is within an overlay district, address the
additional standards of the overlay district
If five or more trees are proposed to be removed, a Tree Felling Permit as specified
in SDC 5.19-100
A wetland delineation approved by the Oregon Division of State Lands must be
submitted concurrently where there is a wetland on the property
Any, required federal or state permit must be submitted COnC4lifllJ1~WBfilr. evidence
the permit application has been submitted for review rKt-Su ilVlllTAl RECIO
Where any grading, filling or excavating is proposed with the deveili.plnf!rg'~l1glnd
and Drainage Alteration permit must be submitted prior to development
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Owner Signatures
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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
Owner:
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 aCknowle~e that I/we are legally responsible for all statutory
timelines, i rmatio ~ e, an~reqUirements conveyed to my representative.
~ Date:
ture
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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 pursuant to the requirements of ORS 227.178 pertaining to a
complete application.
Owner:
Date:
Signature
Print
PRE-SUBMITTAL REC'D
JUN 1 8 2010
Revised 11.19.09
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SUBDIVISION APPLICATION NARRATIVE .
Assessors Map 17-02-32.32 tl1701
327 South 42nd Street
Applicant: Back Porch Properties L.L.C.
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This application proposes the division of a vacant one acre parcel into six lots which will
each be used for construction of a duplex. The preliminary plan submitted also shows a :
separate unit of land labeled as "tract" that would include the driveway access to each of
the twelve units, visitor parking, a storm drainage facility and landscape area. An issue
for discussion at the submittal meeting is whether the tract area should be platted as a
separate parcel or would best be incorporated into the individual lots and an easemenfbe
used over the same area that provides for the various common usages.
The subdivision is proposed under the provisions of SDC 3.2-230 for cluster
subdivisions.
The tentative plan submitted is designed in conformance with the requirements for cluster
subdivisions including setbacks, lot' coverage standards and open space.
A building design plan has been submitted for a duplex on Lot I that faces 42nd Street.
This plan shows design elements required for the street front unit including street side
door opening, connecting walkway, etc. A version of this plan that includes all required
cluster subdivision standards will be used on the remaining five lots.
PRE-SUBMIITAl REC'O
JUN 1 8 2010
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Site Development Plan
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Fidelity National Title Company of
Oregon
LOT BOOK REPORT
Prepared for:
GREG LARKIN
We have searched our records as to the following described property:
SEE EXHIBIT "A"
and as of June 10, 20]0 at 8:00 a.m.
we find that the vesting for the subject real property is:
GREGORY D. LARKIN
-CONTL~UED-
PRE-SUBMITTAL REC'O
JUN 1 8 2010
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LOT BOOK REPORT
PAGE 2
We also find the following apparent encumbrances within ten year prior to the effective
date hereo f:
I. City liens, if any, in the City of Springfield.
2. Taxes owing for the 2007-2008 fiscal year in the amount of$2227.74 plus interest
if any on Map 1702323301701, Acct # 1022654, Levy Code 1900
Taxes owing for the 2008-2009 fiscal year in the amount of $2461.24 plus interest
if any
if any
Taxes owing for the 2009-2010 fiscal year in the amount of$2499.56 plus interest
3. Rights of the public in and to streets, roads and highways.
4. Any easements within the vacated cul-de-sac East of South 4200 Street.
5. Easement to Springfield Utility Board for utilities along the Westerly 10 feet as
recorded August 23,1977, Reception No. 7753414, Official Records of Lane County,
Oregon.
6. Ordinance # 3841 vacating one-half of cul-de-sac East of South 4200 Street,
recorded July 6, 1978, Reception No. 7846719, Official Records of Lane County, Oregon.
7. Jurisdictional Transfer document recorded December 23,2003, Reception No.
2003-122204, Official Records of Lane County, Oregon.
8. Easement to John Khastedai and Gloria I. Smith for ingress and egress on the
Northerly 10 feet as recorded November 19,2004, Reception No. 2004-089585, Official
Records of Lane County, Oregon.
-CONTINUED-
PRE-SUBMITTAL REC'D
JUN 1 8 20lO
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LOT BOOK REPORT
PAGE 3
9. Deed of Trust, including the terms and provisions there, Grantor: Timothy L.
Nasalroad and Gregory D. Larkin, Trustee: D~ S. Kaufinan, Attorney at Law,
Beneficiary: Frontier Investment Co., an Oregon corporation, recorded May 12, 2006,
Reception No. 2006-033296 Official Records of Lane County, Oregon in the Amount of
$258,750.00.
The beneficial interest was assigned to Frontier L-406-0 Joint Venture, recorded
June 5,2006, Reception No. 2006-038620.
Modification of Deed of Trust to correct the legal description, recorded July 7,
2009, Reception No. 2009-038944.
II. Right, title and interest of Timothy L. Nasalroad as disclosed by the Deed of Trust
above.
END OF ENCUMBRANCES
NOTES:
A. This Company finds no other judgments or liens against the vestee therein.
TIllS IS NOT A TITLE REPORT: This is an informational report only. It is not title
insurance nor a guarantee. This service does not include supplemental reports or any
other information. Liability is limited to the amount paid for this report.
Thank you for doing business with FIDELITY NATIONAL TITLE INSURANCE
COMPANY OF OREGON. If you have any questions, please feel free to contact our
office at (541) 683-5422.
FIDELITY NATIONAL TITLE INSURANCE
COMPANY OF OREGON
LONDA MINYARD
Title Officer
PRE-SUBMITTAL REC'D
JUN 1 8 2010
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After recording return to
and mail tax statements to:
Division o( Chio' Doputy Clo~k
Lan_ Counlv C..ds and R.co~ds
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111111111111111111111 IIlllllllm IlIlmllllllll $36.00
0108132420090033883003003306/2212009 02:18:39 PI!
RPR-DEEO Cnt=1 Stna19 CASHIER 01
$15.00 $11.00 $10.00
S'1'A-ru1vaY WARRAN'l'Y DEED
Timothy L. Nasalroad, Grantor, conveys and warrants to
Gregory D. Larkin, Grantee, all his rights, title and
interest in the following described real property, free and
clear of encumbrances except as specifically set forth
below, situated in Lane County Oregon.
See Exhibit A attached hereto and made a part hereof.
Subject to and excepting: Covenants, conditions,
restrictions and easements of record.
The true and actual consideration for this transfer is
other.
BII:J'ORE SIGNING OR ACCI!:PTING :ran INSTRtlMEIlT, :rBl!l PERSON.
TRANSFERRING P'BB :rITLB SBOULO INQUIRE ABOUT TIlE PERSON'S RIGHTS,
IF ANY, UNDER ORS 195.300, 195.301 AND 195.305 TO 195.336 AND
BI!lCTIONS 5 TO 11, CllAPTl:R 424, OREGON LAWS 2007. 'l'BIS INSTRIJKE!lT
DOES NOT ALLOIi USE OF THE PROPERTY DESCRIBBD IN 'l'BIS INST1WMI!lNT
IN VOLATION OF APPLICABLE LAND USE LAWS AND REGULATIONS. BBJ'ORE
SIGNING OR ACC:ZP'l'ING TRIS INSTIWKENT, TRI!: PERSON ACQUIRING I'I!:B
TI'l'loB TO TBII: PROPERTY SHOULO CBll:CR WUR TRI!: APPROPRIAl'E CITY OR
COtlN'1'Y PLANNING DEPARTMENT TO VERIn THAT TRI!: UNIT OF LAND DING
TRANSFERRED IS A LAWFUI.LY ESTABLISHED LOT OR PARCBL, AS DEFINED
IN OJIS 92.010 OR 215.010, TO VERIn TBII: APPROIII!:D US!!S 01' '1'BII: I.AND
OR PARCI!:L, TO DBTERMINE ANY LIMUS ON LAWSUITS AGAINST Il'ARMING OR
POlUIST PRACTICBS, AS DEi'INBD IN ORS 30. 930, AND TO INQUIRE ABOUT
TRI!: RIGllTS OF NBIGIIBORING PROPERTY 0liNBRS, IF ANY, UNDU ORS
195.300, 199.301 AND 195.305 TO 195.336 AND SBCTIONS 5 TO 11,
CHAPTER 424, OREGON LAWS 2007.
DATE:.!lY-"::>?"", 2009.
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PRE-SUBMITTAL REC'O
JUN 1 8 2010
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State of California
County of Fresno
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On
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before me,
J. Embrv , Notary Public (here insert name and title of the officer),
I . -J-I.--.. L. Na r (i./.--oa.d
personally appeared ~ m (;I. _] "
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who proved to me on the basis of satisfactory evidence to be the person(<<) whose name(~ is/ilfe subSCribed to the within
instrument and acknowledged to me that he/!heI\R8v executed the same in hls/lleFfllleh-authorized capacity(jes), and that
by hislller/tAeir signature(.s? on the instrument the person(~, or the entity upon behalf of which the person{~) acted,
executed the instrument.
I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph Is true and
correct.
Signature
WITNESS my hand and official seal.
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(Seal)
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(notary)(12-()7)
PRE-SUBMITTAL REC'D
JUN 1 8 2010
E,a-ow No. 02.-109278-B8 -46
TI,'-O~ No. oo109Z78
EXHIBIT ONE
Beginning at a point on the West line of the Thos. Edwards Donation land Claim No. 55. Township 17 Soum, Range
2 West of the Willamene Meridian. 420.9 feet Nonh of the most Westerly Southwest corner of said Donation land
Claim; running thence East 322.1 feet; thence Nonh 133 feet; thence West 322.1 feet to the West line of said
Donation land Claim; thence South along said West line 133 feet to the point of beginning, in lane County, Oregon.
PRE-SUBMITTAL REC'O
JUN 1 8 2010
06/1812010 09:05 FAX 541 485 ~
OLSON & llORRIS
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PUBLIC WORKS DE.PARTMENT I E.nglneerlng Division
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Phone: (541) 726-3753 Fax: (541) 736.1021
STORMW ATER MANAGEMENT SYSTEM SCOPE OF WORK
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(Plaore r./Un! /0 Malr Stouda,.@ CilynfSpringfidd Public Work, Rngillaering: Fax " 7]6-IOiJ. Phone # 136-/0]5),
1/.11Iail:msloIideltGJcl sprin~fiefd.or liS
Project Name: g... ~ f...,L. P'.rv~'" dv'l.v fvl,.
Assessors Purcel 1"1 - be -3< ~ ;> - 110 I
Land Users): f'1!)1>..
Project Size (Acres): II..
Approx, Impervious Area: o. .. ~ t'+-~~L ~
'Project Description (Include a copy of ^ssessor's map):
Ik~ r'OpOSL. \ ,.' -h, Co",I.....,,-1- /, JJf''''>:-CS
A I..,T"J:. L7" 1- 11 TJ"oct..J.. -rL-t..,.... [..I; II
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Applicant:
Date:
Phone #:
IFax#:
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Drainage Proposal (Public conneclion(s)_ discharge 10catiol1(s). elc. Attach additional Sh..I(S) if necessary:
?.....~.\ 6.'" ~,.;,~~) :l'J",~ J""";'.~L ~ ~.>~ .!;" Jk. f"'t."~ ,,,sJ.I,..J dv....~1H...
l""r.......~t"',.. -I.. 5,A 4~.}. $+.......... ,l:. s~...l. I> ,,-J'r~.L.. +,. <>.<4fJ- f/.....
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Pro'lased Starmwater Bcst Manaaemcnt Practices:
There is 5,850 of cxi$ting pavement on the sileo An area equal to this ur less will be collected in a'standard caleh
basin and piped. The remainder oflile driveway/parking will go into a bio-swalc prior to enteriTlg public system.
_.. 1..11"'11 belli'" ,lIis lille Ii/h'd ""' I", tI.e Cil,' "'<flllelllmed III tbe Anoliell"'} ...:._- --' I
(AI {1 minimum. a/l boxe.s chl!t:ked by the C;'y on the/ron' and back of this sher!/ shalt be .mbmiJred
or (Ill a') liea/ion fO be c:om le/f! ur sU/:1/ulual. al/hou h otherl(! riremen/i may be neassarv.J .
Drainaee Studv TVlle IEDSPM Section 4.03.2): lNote. UI-I mav be substituted for Rational Method)
g Small Sile Study- (use Ratiol1al Method lorealcul.liul1s)
o Mid-Level Development Study - (use Uni. Hydtosmph Method for eale~l.tionsl
o Full Drainage Development Study - (use Unit Hydrogrnph Method for ""Ieul.tions)
Environmental Considerations:
IZl Wellhead ione: ffiJ - qq off{
o Wetland/Riparian; JJA
o Soil Type: tJxU?y - fAflMrJ 2Mi) Ufr/llb'5<
Downstream Analvsis: HbUP1illJ .5ltrY aAY llNJ}
aN/A
o Flow line for starting water surface elevation:
o Design HGL to use for starting water surface elevation:
o Manhole/Junction to lake analysis to:
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o Hillside Deveiopment:
o Floodway/Floodplain:
o Other Jurisdictions
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Return to Matt Stoud<>r@ City of Springfield. omai(; mstoudert1iJcl.soritlClfield.or.us. FAX: 1541) 736-1021
PRE.SUBMITTAl RECtO
JUN 1 8 2010
06/18/2010 09:05 FAX 541 485 ~3
OLSON & 1I0RRIS
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141002
For om",! Use Onl1~ C,(,8)/I).
COMPLETE STUDY ITEMS
'" I3u.H!d upon 1I1~~ hr!r,rmolioll pforidr:cI otl/helronl n!,hjs ~hl!el. the jbllou'irtg re~re!it:m's a miuimum OfH'J~' is ~eeded1.or an
appJic.'ulio" 10 be complelejor,Sllbmilla{ wilb 1't!/if1ecl 10 drofIJoge. hOll'el"l!l: ,M, ltM NJUIIIM IWI be ~(.sed In lIell (iflhe Sprmpiefd.
l)err!lopml!11I (" ode f5DC) or Jh~' City's .Engineering f.)esign h.JanlfuJ. (omplianc(! with these req~lI!'emenl,~ dO,es 1101 constllllte srte
approval; ..J.ddltiouof site .fpecijic ;'~fo/'l1latiQn may be /"f:quired. NOll!: Upon scoplng sheet slIbmillal, ensure cosnpleJedform has been
,~fgm!d In fh~ space prol'lded b~/()w: .
Interim Design St3ndArdsIWater QUAlity (EDSPM ChApter J)
~~~ .. .
18l 0 All non-building rooftop (NBR) impervious surf::J.ces shoji be IJl""c-trentcd (e.g. multi-chambered ca~clJbasin w/oil filtr'ilt;on
medin) for stom'\....taler 'lul1lj~. ^c;lditionnlly, C\ minimum of SO'}U of tl1.: HBR imp,,:rviou:i :iurfcl.clW :sl)aJllx: (flWhlcd by
vegetated m~lhods. '
~ 0 Where required. vegetRtive stonnwafcr design :-hall be consistent wirh interim design srandards (EDSPM Section 3.02), set
forth by the Bureau ofEnvironmelllal Services tBES) or Clean Water Services (CWS).
g D For new NBR impervious area less than 15.000 square feet. a simplified design approach may be followed;ls specified by
the BES for vegetative treatment. ..
J2}:. 0 If a stomlwater lrentrl1ent swule is proposed, submit calculatlonslspeclllcs,tions for sizing, velocity, flow, side slopes. bottom
slope. and seed mix consistent wilh either 8ES or CWS requirements. .
ErO . 0 Water Quality calculatIons as required in Sct:tion 3.03.1 ofthe EDSPM "
. MAil building rooftop mounted equlpm~nr. oro!hcr fluid containing equipment located outside ofrhe building. 56all
be provided with secondary containment or weather resistant enclosure
Ceneml Stndy Requirements (f.DSPM Seetion 4,03)
121 ~ Drainage study prepared by a Professional Civil'Engincc( licensed in (he state of Oregon.
0" A complete drainage study. as required in EDSPM Section 4.03.1, including a hydrological study map.
~ Calculations showing system capacity fOf Q 2-yellr slorm t.:vent and overflow effects of a 2~-year storm. event..
~ D The time of con cent 1st ion (Te) shall be determined using:l 10 minute stllrt time for developed basins.
Review of Downstreum Sysrem (EDSPM Section 4.03.4.C)
o " g A downstream drainage analysis as described in cDSPM Section 4.03.4.C. On~site drainage shall be governed by ~he
. Oregon Plumbing SpeciAlty Code (OPSCl.
o ~Elc\lations ofthe HCL and flow lines for both city and private systcms where applicable.
Design of S[orm Systems (EDSPM Section 4.04)
1;3' D Flow lines, slopes, rim ~levations. pipe type nnd sizes elearly indicated on the plan set.
'El "D Minimum pipe cover shall be 18 Inches for reinforced pipe and 36 inchcli for plain concrete and plastic pipe materials, or
proper engineering calculatiCHlS shall be provided when Jess. The cover shall be sufficien~ to support an'80.0aO Ib lond
without failure of the pipe srructu(e. .
o {21 Manning's "n" v.lu<s for pipes shall be consi'lem wilh Table 4.1 of the EDSP, AlI,torm pipes shall be designed to .
achieve a minimum velocitY oflhrce (JI feet per second al 0.5 pipe full based on Table 4-1 as well.
Other/Mise
t23 0 Existing and proposed cOlltO':lrS, located at one foot intt:rvnl. "Include spot elevations and site gnides showing how site
drains
~ D Private SlormWater easements shall be cl~arly depicted on plans when private storl'r'l'\vater flo\\lS from Qne property to
another " . .
o p;tOl)'wells shall nOl receiVE: runofffronl any surface: wIn being tre:JIed by one or more BMPs. with. the ~x~eption of r~sidcnJal
building roofs (EDSP Section 3.03.4.A). Additional proylsioll$ apply to this tiS requirt:d by (fit.: DEQ. Refer to the wcbsitc;
\.vw\\.dli!!oJ;t;JU!.or.L1!=:,walnrtlunch....q!uichome,hcm for mort infonnntion.. .
o J;;a'Delenlion ponds ,haJJ be designed 10 limit runoff to pre-development rales for the 2 through 25-year storm events
"'rhL'ijorm shall be ;"c/udC!d os an artac"mC!nt, Inside tlle/ront cQJJer, Oftlli! it()r~4ter stllQ}"
Form VerSion 2: Mnrch 2004
(, 1'0 lul
Date
'/MI'OIl/:.INI' T;N(;/IIiT;E/I PUS4Srs READ DHOW ,j
As the engineer of record, I hereby certil)' [he above reqoirecl items 1m:
complete and included with the submitted stonnwater sttldy and pJnn set SignRture
. PRE.SUBMITIAL REC'O
JUN 1 8 2010
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Storm Water Design Report
DRAFT
Project:
Date:
Designer:
Type of Project:
Back Porch Properties Cluster Subdivision
June 18,2010
S. Morris
Medium Density Residential - Duplex Development
Proiect Overview
The proposal is to develop an approximate I acre parcel on South 42nd Street into a 6 or 7
. lotc1uster subdivision with 6 duplexes. The duplexes will be served by a single private
driveway and there will be some auxiliary parking.
. There is approximately 5,850 square feet of existing AC paving on the property that is to
.be removed with the reconfigured site. There were also (2) houses on the property that
have been removed.
Proposed Destination
The drainage from the site will be directed to an existing 12" stonn pipe that was stubbed
to the property during the South 42nd Street improvement project. This stub connects to
the new stonn line that was placed in South 42nd Street and has adequate capacity to serve
the proposed development with no on site detention.
Proposed Pollution Control Facilities
A bio-swale will be constructed at the southwest comer ofthe project. We have designed
approximately 6,450 square feet to sheet drain into this facility. The swale will have a 6
foot bottom, 4: I side slopes, and run at a slope of 0.5%. This will slow down the velocity
to meet contact time requirements.
The remaining 4,865 square feet of paving will be collected in dual chamber catch basins
and tied into the piped stonn system. Since we have an existing paved area of 5,850
square feet to be removed, we are not proposing fossil filter inserts in these basins.
Proiect Site Data
. Impervious Area = 6450 ft2 (bio-swale) II 21,450 ft2 (All Impervious)
Water Quality Intensity = 0.19 inches per hour (Rational Method)
Peak Flow Intensity = 2.1 in/hr (10 yr, 10 min.)
Run off Coefficient = 0.90 (Paving)
PRE.SUBMITTAL REC'O
JUN 1 8 Z010
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Water Quality Flow Calculations - Rational Method
Qwq = CIA = (0.90) x (0.19) x (0.15 Ac) = 0.026 cfs (bio-swale)
Peak Flow Calculations - Rational Method (Entire Site including Bldg)
QplO = CIA = (0.90) x (2.1) x (0.49 Ac.) = 0:93 cfs
Bio-Swale Calculations (attached calculation sheet)
Depth of Flow = 0.05 Feet
Velocity = 0.12 ftisec
Length ofSwale = 66 Feet
Contact Time = (66 ft) / (0.12 ft/sec) = 550 Sec. = 9.16 minutes
This configuration does meet the minimum contact time of9.0 minutes. Therefore we
are proposing to put the area drain at the flow line of the swale and not provide detention.
We are also proposing one check dam at the midpoint of the swale..
Peak Flow Calculation (attached calculation sheet)
The peak flow for the 10 year storm is 0.93 cfs, which results in minimum pipe diameter
of7.25 inches. Therefore, the 12 inch concrete pipe stub to the property is adequate to
serve the development.
PRE-SUBMITTAl RECIO
JUN 1 8 2010
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4.00 ftlft(HV)
4.00 ftlft(H:V)
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0.28 fis/s
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Friction Method
Solve For
Manning Formula
Normal Depth
Input Data'
Roughness Coefficient
Channel Slope
Left Side Slope
Right Side Slope
Bottom Width
Discharge
,Results
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Normal Depth
Flow Area
Wetted Perimeter
Top Width
Critical Depth
Critical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
0.31 .ft
2.27 ft,
8.58 ft
8.50 ft
0.04 ft
5.26894 ftlft
0.12 ftls
0.00 ft
0.31 ft
0.04
Flow Type
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Nu.mber Of Steps
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Profile Desc~iption
Profile Headloss
Downstream Velocity
Upstream Velocity
Normal Depth
'Critical Depth
Channel Slope
Critical Slope
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Infinity ftls
Infinity ftls
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0.04 ft
0.00500 ftlft
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Bentley Systems, Inc. Haestad Methods Solution Center, , BEmtiey Flo'~Mast~r {OS:01:066.00]
27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA ....1.203-755-1666 P~ge'. ,1 'of .1
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p\oj"ct.D.escription-
Friction Method
Solve For
.Input Daia~
Roughness Coefficient
Channel Slope
Normal Depth
Diameter
Discharge
Results,
, Diameter
Normal Depth
Flow Area .
Wetted Perimeter
Top Width
Critical Depth
Percent Full
Cri~ical Slope
Velocity
Velocity Head
Specific Energy
Froude Number
Maximum Discharge
Discharge Full
Slope Full '
Flow Type
G:VF 'I n put Data
Downstream Depth
Length
Number at" Steps
f3Vf O,utp~t Data
Upstream Depth
Profile Description
Profile Headloss
Average End Depth Over Rise
Normal Depth Over Rise
Manning Formula "
Full Flow Diameter
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0,013
0.01000 ftlft
7.25 in
7.25 in
0.93 ft3/S
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7,25 in
7.25 in
0.29 ft'
1.90 ft
0.00 ft
0.47 ft
100,0 %
0.01116 ftlft
3.24 ftls
0.16 ft
0.77 ft
0,00
1.00 ft3/s
0.93 ft3/S
0.00998 ftlft
SubCritical
Peak Flow Pipe Diameter Calculation
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, PRE-SUBMITTAL REC'O
,JI:JNl 8' 2010
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Bentley Systems, Inc. Haestad Methods Solution Cent~r ' ,.,1. Ben~le,y.FrowMaster [~8.Q;1.066.00]_ .
27 Siemons Company Drive Suite 200 W Watertown, CT 06795 USA +1-203-755-1666 Page. '1 of 2
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