T a pia Ra nc h Wa te r Supply Assig nme nt BOARD OF DI RE CT - PowerPoint PPT Presentation

T a pia Ra nc h Wa te r Supply Assig nme nt BOARD OF DI RE CT ORS ME E T I NG JUL Y 17, 2018 I T E M 6.1

Ove rvie w o f Anne xa tio n Pro c e ss •Applic a tio n/ De po sit a nd F unding Ag re e me nt •De te rmine pro je c t de ma nd A •De te rmine BV-RRB Wa te r Supply is a va ila b le •Ne g o tia te Anne xa tio n Ag re e me nt •I nitia te L AF CO pro c e ss B •Applic a nt a c q uire s e ntitle me nts/ CE QA •Bo a rd Appro va l o f Anne xa tio n Ag re e me nt a nd c o nditio ns pre c e de nt (inc luding DWR Appro va l) C •L AF CO a ppro va l

T a pia Ca nyo n 405 Sing le F a mily Ho me s 85 Ac Co mmo n L a ndsc a pe d Are a

T a pia Ra nc h De ve lo pme nt Bo unda ry

Re vise d Anne xa tio n Are a

BV-RRB Wa te r Purc ha se  Se pte mb e r 2002 F ina l E I R b y BV-RRB fo r pro je c t to c re a te supply b y re re g ula tio n o f hig h flo w K e rn Rive r wa te r  Oc to b e r 2006 F ina l E I R b y CL WA fo r Ac q uisitio n  11,000 AF fo r in se rvic e a re a de ma nd  4,735 AF fo r five a ntic ipa te d a nne xa tio ns (E stima te o f 750 AF fo r T a pia Ca nyo n)  Ma y 2007 Purc ha se Ag re e me nt e xe c ute d

BV-RRB Ba c kg ro und (Co ntinue d)  2008 – Do wnturn in ho using ma rke t  Only L e g a c y e nte re d into De po sit a nd F unding Ag re e me nt  2008 – Wa ng e r De c isio n re duc e d SWP re lia b ility  Ag e nc y re se rve d a ll BV-RRB wa te r fo r in se rvic e a re a use  2012 – 3000 AF ma de a va ila b le to L e g a c y a nd T e so ro Anne xa tio ns  2014 – T a pia unde r ne w o wne rship a ppro a c he d Ag e nc y re a nne xa tio n  2016 – 2015 UWMP Ado pte d  2017 – De po sit a nd F unding Ag re e me nt E xe c ute d fo r T a pia Ca nyo n  2018 – Wa te r Re so urc e s a nd Wa te rshe d Co mmitte e re vie we d BVRRB wa te r supply a va ila b ility

Wa te r De ma nd De te rmina tio n  Appro a c h  Sing le -fa mily ho me de ma nd b a se d o n lo t size a nd de ma nd fa c to rs fro m a dja c e nt ne w c o nstruc tio n  Co mmo n la ndsc a pe a re a s b a se d o n de ve lo pe rs la ndsc a pe pla ns a nd c urre nt la ndsc a ping o rdina nc e s  L o ng -te rm e stima te d wa te r de ma nd o f 489 AF / Yr

Anne xa tio n De ma nds I nc lude d in 2015 SCV UWMP Anne xing De ve lopme nt 2015 UWMP Curre nt Pote ntially Using BV- RRB E stimate E stimate Supplie s (AF Y) (AF Y) 2,500 2,500 L e gac y 500 389 T e soro 575 489 T a pia 3,575 3,378 T ota l

2015 SCV UWMP – 2050 Wa te r Ba la nc e Ave rage / Single 4- Ye a r 3- Ye a r Supply Sourc e Nor mal Dry- Ye a r Dr ought Dr ought 31,545 40,215 36,175 35,875 E xisting Gr oundwate r 450 450 450 450 E xisting Re c yc le d 70,707 22,087 45,177 33,167 E xisting Impor te d 7,950 7,950 7,950 Ba nk/ E xc ha ng e s 10,230 20,335 21,875 21,325 F utur e Gr oundwate r 9,604 9,604 9,604 9,604 F utur e Re c yc le d 22,000 22,000 22,000 F uture Bank/ E xc hange s 122,536 122,641 143,231 130,371 T otal Supply 93,900 103,300 103,300 103,300 De mand w/ Ac tive Conse r vation 28,636 19,342 39,931 27,071 Surplus

2015 UWMP - De ma nd a nd Supplie s

Wa te r Supply Re lia b ility Ana lysis  Alte rna tive Wa te r Supply Sc e na rio s c a n b e e xplo re d b y re vie wing the 2017 Wa te r Supply Re lia b ility Re po rt Upda te  Diffe rs fro m UWMP Ana lysis  E mplo ys a study pe rio d o f 2017-2050  De ma nds inc re a se thro ug ho ut study pe rio d  L o c a l a nd impo rte d supplie s va ry with hydro lo g y  Wa te r b a nking / e xc ha ng e pro g ra ms a re o pe ra te d thro ug h 86 hydro lo g ic se q ue nc e s  Pro vide s pro b a b ilitie s o f me e ting wa te r de ma nds

Wa te r Supply Re lia b ility Pla n Sc e na rio s E va lua te d BASE SCE NARIO: Base d on 2015 UWMP de mand, supply, and stor age pr ogr am assumptions SCE NARI O A SCE NARI O B SCE NARI O C Ba se sc e na rio with: Ba se sc e na rio with: Ba se sc e na rio with: SWP supplie s via CA Mo de ra te supply L a rg e supply re duc tio ns • • • Wa te rF ix re duc tio ns L a rg e re duc tio n in SWP • Re duc e d SWP supply supply re lia b ility • re lia b ility Additio na l limits o n • L e ss inc re a se in Sa ug us g ro undwa te r supplie s • pumping c a pa c ity a nd a nd re c yc le d wa te r use re c yc le d wa te r use

I nitia l Re lia b ility o f Sc e na rio s

2050 Ba se Ca se vs. Sc e na rio C Sour c e Nor mal- Ye ar Single Dr y- Ye ar Ba se Ca se Sc e na rio C Ba se Ca se Sc e na rio C Diffe re nc e SWP T a b le A 60,000 42,800 7,600 7,600 Ro se da le Ba nk N/ A N/ A 20,000 10,000 10,000 Ne wha ll Se mitro pic N/ A N/ A 4,950 No t in 4,950 Ba nk Sc e na rio Ne w Ba nk N/ A N/ A 5,000 No t in 5,000 Sc e na rio Alluvium 31,100 (Ma x) 31,100 (Ma x) 27,400 20,600 6,800 29,000 (50% Pro b .) 27,400 (50%Pro b .) Sa ug us 10,700 10,700 33,200 10,700 22,500 T o ta l 49,250

Sc e na rio C: Mitig a tio n Ac tio ns  Co nc lusio ns:  Sto ra g e pro g ra ms ra the r tha n a dditio na l supplie s  Additio na l withdra wa l c a pa c ity fro m sto ra g e pro g ra ms  Ca n a c hie ve 95% re lia b ility g o a l thro ug h va rio us pro g ra ms a nd/ o r c o mb ina tio ns o f pro g ra ms  Po te ntia l a c tio ns use d in re lia b ility e va lua tio n:  E xisting Rig hts Ro se da le -Rio Bra vo Ba nking Pro g ra m  I nc re a se d ta ke c a pa c ity to 20 T AF Y b y 2035  Ac c e ss to F ive Po int Rig hts in Se mitro pic (Pa rt o f NR Spe c ific Pla n)  Cre a te Sa ug us F o rma tio n Wa te r Ba nk  Othe r pro g ra ms c o uld a c hie ve simila r re lia b ility re sults

Re lia b ility o f Sc e na rio s with Sc e na rio C Po te ntia l Ac tio ns E va lua te d

T a pia Ca nyo n Pa yme nt fo r Pa st Ac q uisitio n a nd Ca rrying Co sts T ype of Cost T apia Canyon Shar e Ac q uisitio n Co st 706,109 Ca rrying Co st (2007-2018) 3,399,083 Wa te r Sa le s Cre dits 330,075 T o ta l 3,775,117

Co nc lusio n  Suffic ie nt BV-RRB wa te r supply is a va ila b le unde r 2015 UWMP pla nning a ssumptio ns  Unde r le ss o ptimistic pla nning a ssumptio ns, the Ag e nc y ha s suffic ie nt a ve ra g e wa te r supplie s a nd dry-ye a r de ma nds c a n b e me t thro ug h inve stme nts in sto ra g e pro g ra ms

Re c o mme nda tio ns  T he Wa te r Re so urc e s a nd Wa te rshe d Co mmitte e re c o mme nds tha t the Bo a rd o f Dire c to rs a ppro ve a re so lutio n de te rmining tha t 489 a c re -fe e t pe r ye a r o f Bue na Vista -Ro se da le Rio Bra vo Wa te r Supply is a va ila b le fo r po ssib le use fo r the pro po se d T a pia Anne xa tio n.