Surfa c e Wa te r De sig n Ma nua l Upda te Pla nning Co mmissio - PowerPoint PPT Presentation

Surfa c e Wa te r De sig n Ma nua l Upda te Pla nning Co mmissio n July 7, 2016

T o nig ht’ s Ag e nda  NPDE S Pe rmit Re q uire me nts  Surfa c e Wa te r De sig n Ma nua l Optio ns  Upda te Sa mma mish Adde ndum  Sta ff Re c o mme nda tio ns  Curre nt Dra ina g e Re q uire me nts  F uture Pro je c t I mpa c ts  E xa mple s o f Pro je c ts I mpa c ts  Ve sting  Outre a c h a nd E duc a tio n  Sc he dule

NPDE S Pe rmit  Ma nda te d b y the De pa rtme nt o f E c o lo g y  Ne w sta nda rds fo r c o ntro lling runo ff  L o w I mpa c t De ve lo pme nt  Prio rity list o f L I D BMPs must b e imple me nte d

NPDE S Pe rmit Re q uire me nts  Curre nt de sig n ma nua ls do no t c o mply with 2013-2018 pe rmit  Re visio n Re q uire d  Must b e e q uiva le nt to 2012 Sto rmwate r Manag e me nt Manual fo r We ste rn Washing to n (E c o lo g y Ma nua l)  Adoption by De c e mbe r 31, 2016

Surfa c e Wa te r De sig n Ma nua l Optio ns 1. Ado pt 2016 King Co unty Surfac e Wate r De sig n Manual (2016 K CSWDM) 2. Ado pt 2012 Sto rmwate r Manag e me nt Manual fo r We ste rn Washing to n (E c o lo g y Manual) 3. Autho r a nd a do pt a Sa mma mish spe c ific Sto rmwa te r De sig n Ma nua l

De sig n Ma nua l Co mpa riso n 2012 E c ology Ne w Sammamish 2016 KCSWDM Manual Manual E c o lo g y a ppro ve d E xte nsive pub lic invo lve me nt pro c e ss Co nsiste nc y in a ppro a c h b e twe e n c urre nt Sa mma mish a do pte d ma nua l (2009 K CSWDM) Sta ff a nd de ve lo pe r fa milia rity with Co re Re q uire me nts De ta ile d de sig n g uida nc e T e c hnic a l/ inte rpre ta tio n/ tra ining suppo rt F e a sib ility o f me e ting pe rmit a do ptio n de a dline o f De c 31, 2016

Sa mma mish Adde ndum  Simila r to c urre nt Sa mma mish Surfa c e Wa te r De sig n Ma nua l Adde ndum  Sta te s re le va nt SMC se c tio ns  Re fe rs to a ppro pria te de pa rtme nts  I nc lude s Sa mma mish-spe c ific inte rpre ta tio ns o f:  De finitio ns  E xe mptio ns  Ge ne ra l unde rsta nding  Will inc lude Sa mma mish flo w c o ntro l a nd wa te r q ua lity ma ps  Re q uire multi-func tio na l sto rmwa te r fa c ilitie s

Sta ff Re c o mme nda tio ns  Ado pt the 2016 K CSWDM with upda te d Sa mma mish Adde ndum a nd SMC T itle 13  F uture wo rk ma y inc lude :  Cre a te Critic a l Dra ina g e Are a s to inc lude I ng le wo o d, T a ma ra c k, a nd/ o r o the r a re a s  Additio na l pub lic a nd sta ke ho lde r e duc a tio n a nd invo lve me nt  Re vise a nd distrib ute te c hnic a l a nd g e ne ra l e duc a tio na l ma te ria l a b o ut c ha ng e s

Curre nt Dra ina g e Re q uire me nts  Dra ina g e re vie w re q uire d whe n  Cre a ting mo re tha n 2,000 sf o f ne w plus re pla c e d impe rvio us surfa c e  500 sf o f ne w plus re pla c e d impe rvio us surfa c e within I ng le wo o d Histo ric a l Pla t  Use 1998 K CSWDM  Pro je c ts disturb ing le ss tha n 1 a c re  No t within e ro sio n ha za rd ne a r se nsitive wa te r b o dy o ve rla y  Use 2009 K CSWDM  Pro je c ts disturb ing 1 a c re o r mo re

K e y Cha ng e s to Re q uire me nts  2016 K CSWDM  L I D no w re q uire d to the ma ximum e xte nt fe a sib le  Re q uire s tie re d a ppro a c h to a sse ssing fe a sib ility o f L I D type s  ‘ Ca fe te ria me nu’ a ppro a c h to L I D imple me nta tio n  Ma y re q uire fo rma l flo w c o ntro ls o r wa te r q ua lity fa c ilitie s

K e y Cha ng e s to Re q uire me nts c o nt.  2016 K CSWDM  Stre a mline d dra ina g e re vie w fo r sma ll pro je c ts  Pro vide s le ss c re dit in mo de ling g ive fo r L I D  All tra nspo rta tio n pro je c ts no w re q uire d to use L I D  F a c ility De sig n re q uire me nts a nd la ndslide pre c a utio ns upda te d

Pro je c t I mpa c ts  I nc re a se in c o st a nd c o mple xity, e spe c ia lly fo r me dium-size d pro je c ts  Additio na l do c ume nta tio n a nd re vie w re q uire d  L I D re q uire d fo r rig ht-o f-wa y pro je c ts  Ne w ma inte na nc e pe rfo rma nc e sta nda rds fo r L I D BMPs

E xa mple o f Sing le F a mily I n-fill De ve lo pme nt I mpac ts  Bac kgr ound  T e a r do wn & re b uild  E xisting 9,600 sf lo t  R4 Zo ning  Curre nt ho me :1,900 sf  No c ritic a l a re a s  Ne w ho me : 2,500 sf  600 sf ne w impe rvio us  1900 sf re pla c e d imp. Surf.  1998 KCSWDM  Sma ll Site Dra ina g e Re vie w  2016 KCSWDM  Simplifie d Dra ina g e Re vie w

E xa mple o f 2 L o t Sho rt Pla t De ve lo pme nt I mpac ts  Bac kgr ound  E xisting 16,000 sf lo t  R6 Zo ning  Sub divide : two 8,000 sf lo ts  No c ritic a l a re a s, No ROW, a nd fro nta g e impro ve me nts  E xisting ho me : 3000 sf  E xisting drive wa y: 500 sf

2 L o t Sho rt Pla t (CONT I NUE D)  De ve lope d Conditions  Assume 4,000 sf impe rvio us surfa c e (e a c h lo t)  F o r sho rt pla t  4,500 sf ne w impe rvio us  3,500 sf re pla c e d impe rvio us  8,000 sf ne w plus re pla c e d impe rvio us surfa c e  1,000 sf ne w plus re pla c e d po llutio n g e ne ra ting impe rvio us

2 L o t Sho rt Pla t (CONT I NUE D)  1998 KCSWDM  Sma ll Site Dra ina g e Re vie w  No de te ntio n o r wa te r q ua lity fa c ility re q uire d  F lo w c o ntro l BMPs re q uire d suc h a s dry we lls o r spla sh b lo c ks  2016 KCSWDM  F ull Dra ina g e Re vie w  De te ntio n a nd/ o r wa te r q ua lity fa c ility ma y b e re q uire d  L I D BMPs re q uire d fo r a ll impe rvio us surfa c e s 8000 sf

E xa mple o f Sub divisio n Pro je c t De ve lo pme nt I mpac ts  Bac kgr ound  K a mpp De ve lo pme nt  T o ta l pa rc e l a re a : 31.2 a c re s  R6 Zo ning  Site c o nta ins  We tla nd  E ro sio n ha za rd  L a ndslide ha za rd  No c ritic a l a q uife r re c ha rg e a re a s  De ve lope d Conditions  Pro je c t pro po se d 121 lo ts  Re vie we d unde r 2009 K CSWDM

Sub divisio n Pro je c t (CONT I NUE D)  2009 KCSWDM  F ull Dra ina g e Re vie w  De te ntio n a nd wa te r q ua lity fa c ilitie s c o nstruc te d  I mpe rvio us surfa c e s fro m 10% o f e a c h lo t re q uire d to use L I D BMPs  E ng ine e r a nd De ve lo pe r c ho se to re duc e impe rvio us surfa c e s to me e t L I D re q uire me nts  2016 KCSWDM  F ull Dra ina g e Re vie w  De te ntio n a nd wa te r q ua lity fa c ilitie s a re still re q uire d  L I D BMPs a re re q uire d fo r a ll ne w a nd re pla c e d impe rvio us surfa c e s (inc luding ROW)  Re duc e d impe rvio us surfa c e o nly a llo we d whe n a ll o the r L I D BMPs a re sho wn infe a sib le

Ve sting  Da te s se t b y NPDE S pe rmit a nd no n ne g o tia b le  2009 K CSWDM o r 1998 K CSWDM  Applic a tio ns de e me d c o mple te d b e fo re De c e mbe r 31, 2016  2016 K CSWDM  Applic a tio ns de e me d c o mple te d o n o r a fte r Ja nua ry 1, 2017  Applic a tio ns de e me d c o mple te prio r to Ja nua ry 1, 2017 tha t ha ve “ not sta rte d c onstruc tion” b y Ja nua ry 1, 2022

Outre a c h a nd E duc a tio n  Co o rdina tio n a nd pub lic o utre a c h to info rm a nd g e t input fro m  E le c te d o ffic ia ls  De ve lo pme nt c o mmunity  Co nsulta nts  Pub lic  City sta ff  Ope n Ho use  Sta ke ho lde r Me e ting s (2)

Sc he dule Sta ff intro duc tio n to Pla nning Co mmissio n July 7, 2016 Sta ff me e ting with individua l Co unc il me mb e rs July 15, 18, 19, 2016 Pub lic Ope n Ho use July 27, 2016 Sta ke ho lde rs Me e ting s (2) August and Se pt 2016 PC Pub lic He a ring / De lib e ra tio n Se pte mbe r 1, 2016 PC Ha ndo ff to City Co unc il Nove mbe r 1, 2016 City Co unc il Disc ussio n Nove mbe r 8, 2016 City Co unc il F irst Re a ding Nove mbe r 15, 2016 City Co unc il Se c o nd Re a ding a nd Ado ptio n De c e mbe r 6, 2016

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