I ng le wo o d Histo ric Pla t Dra ina g e Co de Pub lic Me e - PowerPoint PPT Presentation

I ng le wo o d Histo ric Pla t Dra ina g e Co de Pub lic Me e ting Sa mma mish Pub lic Wo rks Ma y 25, 2017

T o nig ht’ s Pre se nta tio n  I ng le wo o d Pla t Histo ry  Sto rmwa te r Co de • City-wide c o de • I ng le wo o d Pla t a re a Dra ina g e Co de  De finitio ns  Ne xt Ste ps

Wha t Wo n’ t b e Addre sse d T o nig ht  Spe c ific ne ig hb o rho o d de ve lo pme nt pro po sa ls  I ng le wo o d Hill Dra ina g e Ca pita l I mpro ve me nt Pro je c t  E xisting ne ig hb o rho o d dra ina g e pro b le ms

I ng le wo o d Pla t Dra ina g e Histo ry  Pla tte d in 1889  “Pa pe r Pla t”  No fo rma l ro a ds  No fo rma l dra ina g e syste m  Pa rc e ls ve ry sma ll, a vg __ sf

I ng le wo o d Pla t Dra ina g e Co de De ve lo pme nt Ba c kg ro und  Dra ina g e re vie w wa s no t re q uire d fo r sing le fa mily re side ntia l de ve lo pme nt a dding <2,000 SF ne w impe rvio us surfa c e • De ve lo pme nt disc ha rg ing unc o ntro lle d sto rmwa te ro nto a dja c e nt ro a ds o r pro pe rtie s • E ro sio n a nd flo o ding o c c ure d  So lutio n  E me rg e nc y Ordina nc e pa sse d 2014 a nd c o difie d in 2015  Prima rily impa c ts I ng le wo o d Pla t

City-wide Sto rmwa te r Co de Prio r to I ng le wo o d Pla t c o de , dra ina g e re vie w re q uire d whe n pro je c t wa s sub je c t to a c ity de ve lo pme nt pe rmit o r a ppro va l, AND wo uld re sult in:  2,000 sf o r mo re o f ne w, re pla c e d, o r ne w plus re pla c e d impe rvio us surfa c e , OR  7,000 sf o r mo re o f la nd disturb ing a c tivity, OR  Co nstruc t o r mo dify a 12-inc h o r g re a te r sto rm pipe / ditc h, OR  Pro je c t lo c a te d within a Critic a l Dra ina g e Are a , OR  Co nta ins o r ne xt to a flo o d ha za rd a re a , OR  Re de ve lo pme nt with $100,000 o r mo re o f impro ve me nts o n hig h-Use Site , OR  Whe n ne w impro ve me nt c o sts e xc e e d 50% a sse sse d va lue o f e xisting impro ve me nts SMC 13.20.020

I ng le wo o d Pla t Sto rmwa te r Co de Ne w o rdina nc e e nsure d fo llo wing ne w c o nditio ns a pplie d to I ng le wo o d Pla t*  Dra ina g e re vie w re q uire d fo r c re a tio n o f 500 SF or mor e of new, r eplac ed or new plus r eplac ed imper vious sur fac e, AND  I f sto rmwa te rdra ins o ve r L a ndslide Ha za rd Are a with slo pe s >15%, the n ed thro ug h the la ndslide ha za rd a re a stor mwater tightline pipe is r equir to a n a c c e pta b le disc ha rg e po int unle ss: • 100% o f runo ff c a n b e sa fe ly infiltra te d, o r • <500 SF o f ne w impe rvio us surfa c e a dde d w/ in na tura l disc ha rg e a re a  Ne w r aphy, no t o n c ritic al are a e quir e me nts base d on ge ogr de signatio n . * I t a lre a dy a pplie d to a ll E ro sio n a nd L a ndslide Ha za rd Critic a l Are a s Or dinanc e No. 2015-389, SMC T itle 13

City-wide E ro sio n a nd L a ndslide Ha za rd Critic a l Are a s

ng le wo o d Pla t Critic a l Are a s I

So me De finitio ns  Ne w I mpe rvio us Surfa c e - SMC 13.10.480 Cre a tio n o f ha rd/ c o mpa c te d surfa c e s. E xa mple s inc lude : Ro o fs Gra ve l Pa ve me nt Pe rme a b le pa ve me nt Drive wa ys Gre e n ro o fs  Re pla c e d I mpe rvio us Surfa c e – SMC 13.10.590 I mpe rvio us surfa c e s re mo ve d a nd re e sta b lishe d a s impe rvio us surfa c e s. I nc lude s: • Re mo va l o f b uilding s do wn to fo unda tio n • Re mo va l o f pa ve me nt to b e lo w b a se c o urse • Re lo c a tio n o f impe rvio us surfa c e o n the pro je c t site

So me De finitio ns (c o nt)  L a ndslide Ha za rd Are a - SMC 21A.15.680 • Are a s po te ntia l sub je c t to risk o f ma ss e a rth mo ve me nt • Are a s with 40% slo pe s o r ste e pe r a nd with a ve rtic a l re lie f o f 10 o r mo re fe e t • Are a s with o the r e xisting g e o lo g ic ha za rd c o nditio ns  L a ndslide Ha za rd Dra ina g e Are a - SMC 21A.15.681 Are a s tha t dra in to L a ndslide Ha za rd Are a s  Critic a l Dra ina g e Are a s – SMC 21A.15.255 • L a ndslide Ha za rd Dra ina g e Are a s • Are a s tha t dra in to Pine o r Be a ve r L a ke s

So me De finitio ns ( c o nt )  E ro sio n Ha za rd Ne a r Se nsitive Wa te r Bo dy Ove rla y - SMC 21A.15.417 • Ma ppe d e ro sio n ha za rd a re a s tha t dra in dire c tly to la ke s o r stre a ms • Co nsists o f No Disturb a nc e Are a a nd Are a s Dra ining to No Disturb a nc e Are a

Ne xt Ste ps  Re vie w fe e db a c k fro m Pub lic Me e ting Ma y 2017  Dra ft c o de re visio ns June 8, 2017  Pla nning Co mmissio n Wo rk Se ssio n June 15, 2017  Pla nning Co mmissio n Pub lic He a ring July 6, 2017  City Co unc il Study Se ssio n Se pt 2017  City Co unc il 1 st Re a ding / Pub lic He a ring Oc t 2017  City Co unc il 2 nd Re a ding / Ado ptio n Oc t 2017

We ’ d like yo ur fe e db a c k: Sho uld the c o de pro visio ns tha t o nly a ffe c t the I ng le wo o d Pla t b e c ha ng e d? I f so , in wha t wa y?