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HomeMy WebLinkAboutComments PWE 4/19/2007 ,- " ~, Memorandum Date: :ApriI19,2007 II ' ,', To: :Andy Limbird, Urban Planner From: ::Jesse Jones, Civil Engineer Subject'SUB2007-000l4, Knights Partition , , CitY of Springfield I have revieWed the materials provided with the subject application. The recommended findings and conditions outlined below are provided for your use in preparing the land-use debsion. .' ' , SANITARY SEWER ' , J Finding: Sanitary treatment and disposal will be provided through individual septic , , systems. ' ' STORMWATER MANAGEMENT ,', ' ,':' ' ,",' :,' !Finding: R60frunofffrom each parcel will be directedto individual drywells:',',' -, ",'" .~ , '- . . . . - " - ..' . , Finding: Stonnwater runoff from the proposed driveway widening will be directed to the' , I proposed v~getatedfilter strip/soakage trench located in the proposed Public Access,' , If . , . . '. - . " Easement. i ' ' ' .. ", jFi~ding: SLion 32.i 10'(2) of the SD~ requires that th~App~ov~; Authority shall ;a{lt development approval only where adequate public and/or private stormwater . management systems provisions have been made as, determined by the' Public Works, '. .,..:' . Director, c6nsistent with the Engineering Design Standards and Procedures Manua/ . I'. ,_'" '. . - _" ',-',' ... .. (EDSPM)..,I, , '... ' , " ", " "". ',', ." .,~' . . .:.. 'i_ " . - _," . . ' ". ... ....,.. . .' . ~ ."'. . - . . . j Findi/;g:. S~ction 3;.1 iO(~)~fthe SDC states th~t~ s;on~wate; ~~nagementsyste~ , . " ,shallaccom,modate,potentIal run_off from Its entIre upstream dramage area, whether ',''- .e," , .. inside,or outside of the development.,.' " ",' , , " ~.', ' . . '.!;.> ,',' " ....". "'., . . .." "II ' , " .' . J" j .Fi~ding.: Secti~n 32.'110 (4) of the SDC 'requires that run-off from a development shall be.' ... directed to an approved stormwater management system with sufficient capacity to ' accept the discharge,,'. ';,,: '. , ..', . , '.,' :, '" . ,,' ~ . '> ...., ~. :- :.'-1_ . . ".1. . ,.<. '. . ''- I,',> <, ,.j Finding: Section 32.110 (5) of the Springfield D'evelopment Code (SDC) requires new .' " ,:.. 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:',' " "." ' . .' . . , \ .' . , ' ;" .. ,., ." ' "J " '. ,.', " " j Finding: The existing p~blic storm~ater system, to' which the applicant proposes .. ...' connection; has limited capacity, The applicant has turned in hydrologic storm water ,', calculations, consistent with the City's EDSPM. showing that the proposed detention.' pond will limit the peak stormwater discharge rates to the precdeveloped 2-year storm " ' - : .;.' .- . . . .,,-;, ,.' ...' ...., ':_, ~a!~~eeej~~d;~P~Ll~7 i. .;,; '. , P!Snn8r; ~L '. '.,' . :, ' I ~1 ~' > :. , .' . " , , .. . ,'- " ~. , ',' .. event far both the 2 and 25~year past-develaped starm event, thereby limiting the'flaw ' , ' ' into. the existing system: .. ' j Condition:' The proposed vegetated strip/soakage trench must be located outside the public access easement. . . :1 WATER OUALrfV Finding: Under Federal iegulatian afthe Clean Water Act (CW A), Endangered Species j Act (ESA)}and Natianal Pallutant Discharge Elin:inatian System (NPDES), the City af Springfield!:has abtained a Municipal Separate Starm Sewer System (MS4) permit. A provisian af this perinit requires the City demanstrate effarts to. reduce the pallutian in urban stamiwater to. the ,Maximum Extent Practicable (MEP). , ' " ~ '.. . . J' Finding: Federal and Oregan Department afEnvironmental Quality (ODEQ) rules" , require the'(:jty's-MS4 plan address six "Minimum Cantrol Measures." Minimum " Cantrol Md'asu;e' 5, ';Past-Canstructian Stannwater Management far Ne~ Develapment and Redevelapment," applies to. the propased develapment. ' I '. '" . . ",: , ' , 'Finding: Minimum Cantral Measure 5 requires the City af Springfield to develop, ' I implement :~nd enfarce' a program to ensure the reduction af pollutants in stonnwater' , runaffta the MEP, The City must also. develap and implement strategies that include a cambinatiO:n of structural ar non-structural Best Management Practices (BMPs) . ' appropriate~'far the community.. . ',,'. , " ,,' ,.",.- if . . . ',' ,.' ", , Finding: Minimum Contra I Measure 5 requires the City af Springfield use an ardinance,' ,or ather regulatary mechanism to address past canstruction runaff fram new and re-,,", ',j, developme~t prajects to. the exte.nt allowable under State law. Regulatory, mechanisms', , used by the CIty mcludetheSpnngfield Develapment Cade (SDC), the CIty'S ' ' , . . . . .' Engineering Design Standards and Procedures Manual (EDSPM) and the future' Starmwater Facilities Master Plan (SFMP). ' .">' ".!.".' '".' . ,." . . . . ", , "'1', ", " , ' ',' " , Finding' p;~ required in Section 31.050 (5) of the SDC, "a development shall be required' , j to employ drainage 11'anagement practices approved'by the Public Works Director and ' , " ',,' consistent with Metro Plan policies and the Eligi(weringDesign StaJidards and ' ' , " " " ProcedureS Manual." , ' ;_,l :. . ",':'.'l ':':~' . " : . . _.' .: ._, '.. ,'Fii1ding: Sectian 3.02 of the City's EDSPM' states the Pubic Warks Department will ,,;' :" J accept, as interim design standards for starmwater quality, wate: quality facilities, , " '-" ' , 'desIgned p}lrsuant to. ,the pohcles and procedures ,of eIther the CIty afPartland (BES), ar ' the Clean Water Services (CWS). ' ," " " - , '., ,,',',' . ,1,,' ., >,. .'." . ;< .~;.{: .': . " . Finding: S~ctia~3.03.3.Bafihe City's EDSPM'states all public and private develapment' " ",',' and redevelapment projects, shall employ a system' af one ar more past-develaped BMPs ' "'."j' that in cambinatian are designed to. achieve at least a 70 percent reductian in the tatal,: ; , ..' ' "suspended:~alids in the runaff generated by that development. Sectian 3.03.4.E afthe " :' manual requires a minimum of 50 percent af the non-building roaftap imperviaus area on " a siteshall'be treated for stannwater quality improveme~t us~ng veg~tative methads" ' I ' ", .-,. P". . ': ,~r r .'" . .r. . '.' \. '. . ,.., [)~t8rq~IYe?;"<wi"bJll Plar,,,,,..,, !-\L, ," ' ;., ': .' , u' "', -'-..' .".,j " '. ,"';7,-:' "', "':,.:", ;, ",."~- , ' -, . . .' ;\; ",ri' . ,',. " " , , , , Finding: Th,e ~~getation proposed for use in the swales will serve as the prirriary pollutant removal mechanism for the stormwater runoff, and will remove suspended solids and pollutants through the processes of sediment~tion and filtration. Satisfactory ,pollutant removal will occur only when the vegetation,has been fully established. ' , , Condition: Prior to F'inal Plat approval, the applicant shall submit a seed mix for the , , ,';proposed vegetated strip/soakage trench. 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 ofPorlland stormwater management manual may be referenced fo~ design. j " PUBLIC STREETS. SiDEWALKS & IMPROVEMENT ARGEEMENTS Finding: Section 32,020 (7) (b) of the Springfield Development Code requires that "j' whenever a'proposed land division or development will increase traffic on the City street system and that development has any unimproved street frontage abutting a fully improved street, that street frontage shall be fully improved to City specifications. Exception ('a) notes that in cases of unimproved streets"an Improvement Agreemehtshall . ' ,be required: as a'condition of Development Approval postponing improvements until such , , ,time that a bty street improvement project is initiated. " " ',,', ",' , " J Condition:lt~rio:r to app~o~al of the Final ~Ia~, the'applicant s~an ex.ecut~ ami re~or~' ,,' " an ImprovementA-greement for Garden Avenue, for curb, gutter, s.ldewalk,storm ,', sewer, sanitary sewer, street lighting and street trees, I; , .." ; . . . . UTILITIES. EASEMENTS AND RIGHTS OF WAY ~'Finding: Secti~n 32.120 (5) ofth~ SDC requires applicants proposlngde~elopments 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. 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. " .', ," .' , j' , " " ,~' ': ~ . .,.. , I;' ~., jFinding: 'The applicant' proposes a 7 foot P.U.E: along the southern property line of Parcel 2 and 3 and a portion of Parcel I. A 5' private water easement is proposed ,,' alongside tpe 7' PUE., :. , .," , ," "".. .: ':',::,1 '. .- . "; " '~'.' , . ' ,".~;: " 't' . " "_ -, ',.' , ,,"".'1' ,c. ...., , .:, ' ' .." ,.:' "~ \ I,". :\ ' '.. ,;.. .':'" '.' . ': .' '.' ..',' '. ~. ",' . ,,' . \ ' -'- '.. '., ,.", '."i ' :', " NOTE: The intent of this list is to give a developer insight about requirements related to' " , public i~provementsbefore they develop their property., ",'" OTHER PERMITS " 'r. "-.'"., '.-': ,.:;' r' . :J .(. ......',... .' ,,:' , ':J" "" ''-,," ',', FEES ANIl PERMITS " .-,',.. - 1:.', " ,- : " ,( "SYSTEMS DEVELOPMENT CHARGE:' , , I. , I ':.' _ " " '. ,. : 'ii ....; ." ' . ',,~, ,..". :'. ' ". ' . ," , . -',.' . " ," . , , Pay applicable Systems Development Charges when building permits are issued for . .' ',' developments within the City lip1its or within the Springfield Urban Growth Boundary. :, ", ,'~"" '. '-,'. .. :. ' , ' ;': ' . '!.< ".oa~~ Rer~iv~d: " f!fA7~ L '.' .' :!. '..,' ,planill:;l,:.".L '. . "., ' '.' .', ,,~ , ',' jt '... .' ,..' ,. .... .- ;~ .- ','. ~', '." , " ',., ;;. . ~,': . , ~ ',' ',' ';' . . ~. , '" " ,'r . .-, .' .~,' 't ..' '. ~..... , ,> ""'. '.: -; ... .', ':". . ..: , '" ;',,", "., " ,:'. ,.. . , . .' "".. I :" ..;. ' Systems Development Charges (SDC's) wilhapply to the construction of buildings and 'site improv~ments within the subject site. The Charges will be based upon the rates in effect at the time of permit submittal for buildings or site improvements on each portion or phase ofthe development. " " ., SANITARY SEWER IN-LIEU-OF-ASSESSMENT CHARGE: ~ . . ' .' . Pay a Sanitary Sewer In_Lieu-of-Assessment charge in addition to the regular connection fees ifth~ 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 Divi,sion to determine ifIn-Lieu-of~Assessment charge is applicable. lOrd ,~~ " ' " ,1, PUBLIC INFRASTRUCTURE FEES: ,It is the responsibilhy'ofthe private develoJl~r to fund the public infrastructure. . '. II , OTHER CITY PERMITS: '." i' >; . ~ ... Encroachment Permit or Sewer Hookup Permit (working within right-of-way or public easements)'iexample: new tap to the public storm or sanitary sewer, or adjusting a manhole. [The current rate is ~130 for processing plus applicable fees and deposits] , , ". ,",. " Land & Drainage'Alteration Pennits (LDAP). IContaci the Springfield Public Works Departmen,t @ 72q-5849 for appropriate applic~tions/requirements] , ADDITIONAL PERMITS/APPROV ALS MA Y'BE NECESSARY:,' . ..... .;,'-. " ~', "'.... '.' " . ..; ;-'~ "...... .' i~ ..' : " 0 Metropolitan Wastewater Managem';nt (::ommission (Pump station, sanitary , .', sewers 24 inches or larger) :, '::'. "' ,,', ..'" ..' " 0' LaileCounty Facilities Permit (If the project iswithin Lane County jurisdiction) ." 0 ,'Railroad (If the project crosses a railroad) . . , ' :<; .:Oregon Department of Tt'ansportation (lfthe'project is within ODOTju~sdictiort) ,.,..' " ., Di~ision of State Lands (Storm water 'discharge, wetlands) , ," >",' ',' , " 0, Oregon Department of Environmental Quality (Erosion control (5 ac~es or greater), pump station, storm water discharge, wetl~nds) " " '. " U.S. Army Corps of Engineers (Storm waterdischarge, wetlands): ..' o . ' '. . .' - .-.' ~\i.:", ..,.'. , ,':'. .- ',,1 .', " . " ~:. ,~.> 'j ~. .' " ..... ,.'f, . , :,' .... " , ~ ' .' , l ~_ .;." . . . 'T, .... . -.. ~ ., ',', .", . ;-,' .' .," -; ," '.1,1,~~,',,',"" . .....".... . ," I,'. ,," '. ,;, '. .' :".QateRe~l~ad,Lf)f/)t;~7 .:: ' ,p',anne~: AL' ;', ,.,1 " ' ..,.... ,."'.',,, .'... t '. .' <,' .., t,' ',\ ,> .... . ,1'""~ J, ' '.'.\ .f "'. '...,.'''', ..,.,.... "'.:.'" . 1., ' "'", ..;1 ". ....' J .. :,.' ';, ',' .', <;. ~. , ., ~, .. .' ". t: '\- .' .~? ., _""i, ~ . ..' ',,' .." . ",: , ",