Me e ting o utline Progress update on the City of San Joses - PowerPoint PPT Presentation

President’s Day Weekend Sto rm Co mmunity Me e ting a nd Wo rksho p April 17, 2017

Me e ting o utline Progress update on the City of San Jose’s recovery efforts 1. 2. Wa te r distric t pre se nta tio n o n: Weather situation leading to the Presidents’ Day • We e ke nd sto rm a nd flo o ding • Sto rm ro le s, c o o rdina tio n a nd winte r pre pa ra tio ns • Pro po se d so lutio ns: sho rt, inte rme dia te a nd lo ng te rm 3. Sma ll g ro up disc ussio n 4. Re po rt o ut fro m the sma ll g ro up disc ussio ns 5. Ne xt ste ps 6. Sta ff a va ila b le to a nswe r q ue stio ns

Winter of 2016-2017 was an extr aor dinar y r ainy season.

Distric t ro le s a nd re spo nsib ilitie s Co untywide Distric t I nfra struc ture sta biliza tio n • 275 o f the 800 mile s o f c re e ks • F o r Mid-Co yo te Cre e k Distric t o wns le ss tha n 10% o f rig ht-o f-wa y Mo nito r a nd a sse ss info rma tio n Ac tiva te e me rg e nc y pla ns Sha re info rma tio n Attachment1 | 4 Page 10 of 80

Ro le s & re spo nsib ilitie s the wa te r distric t is no t e ng a g e d in Asse ss lo c al c o nditio ns I nfo rm pub lic a nd first re spo nde r a g e nc ie s a b o ut e vo lving c o nditio ns Dire c t po lic e , fire , E MS, pub lic wo rks a nd o the r huma n se rvic e s func tio ns I nitiate , c o mmunic ate a nd c arry o ut safe ty a c tio ns suc h a s e vac uatio ns Pro vide c are , me dic al se rvic e s, a nd she lte r | 5

F lo o d pro te c tio n pro je c ts: pla nning , de sig n, o r c o nstruc tio n Coyote Watershed • Upper & Lower Berryessa creeks creeks • Upper & Lower Penitencia creeks • Coyote Creek • Lower Silver Creek • Lake Cunningham Lower Peninsula Watershed • San Francisquito Creek • Permanente Creek Guadalupe Watershed • South Bay Shoreline Study • Upper Guadalupe (reaches 7, 8, & 12) • Canoas Creek (bank repair completed) 6 |

Pre -se a so n pre pa ra tio ns: June – Oc to b e r • 8,250 c ub ic ya rds o f tra sh & de bris c le a ne d • 84,000 c ub ic ya rds o f se dime nt re mo ve d • Cre e k b a nk sta b iliza tio n • 5 a c re s o f in-stre a m ve g e ta tio n re mo ve d 7 |

Winte r pre pa re dne ss: Oc to b e r - No ve mb e r • I nte r a g e nc y c o o rdina tio n • Annua l winte r wo rksho p • Ande rso n Da m func tio na l e xe rc ise • ArkSto rm ta b le to p e xe rc ise • Pre -sto rm inspe c tio ns • Pre ve nta tive ma inte na nc e • Re spo nd to fie ld c o nditio ns 8 |

Co yo te Wa te rshe d 322 sq ua re -mile s, inc luding 16 ma jo r c re e ks | 9

We a the r situa tio n o ve rvie w Se rie s o f a tmo sphe ric rive rs b a c k-to -b a c k (~200% o f a ve ra g e ) Oro ville Da m spille d I n Sa nta Cla ra Co unty 8 o ut o f 10 da ms spille d Se c o nd hig he st se a so na l ra infa ll a t Co yo te Re se rvo ir ra in g a ug e sinc e 1936 | 10

We a the r situa tio n o ve rvie w L e ss tha n ha lf-full Ande rso n Re se rvo ir fille d to the brim in a mo nth-a nd-a -ha lf Re c o rd spill o ve r Ande rso n Da m in its 67-ye a r histo ry a nd c o ntinue d spilling fo r 10 da ys Re c o rd flo o d wa te rle ve l Co yo te Cre e k E de nva le Stre a m Ga ug e T ue sda y, F e b . 21 13.7 fe e t Pre vio us Re c o rd (1922): 12.8 fe e t | 11

lo ws: 1/ 1 – 2/ 28 Co yo te Cre e k F Coyote Creek at Madrone Streamflow Gauge (ALERT gauge 5082)* 6 8000 Anderson Reservoir spillway 7000 flows peak at above 7,000 cfs 6000 Anderson 5000 Flow (cfs) Reservoir 4000 outlet Anderson Reservoir outlet is closed on reopened 2/20 as spillway flows exceed 2,000 cfs 3000 Anderson Reservoir outlet on2/24 opened 100% on 1/9 (~425 cfs) 2000 Anderson Reservoir begins to spill on 2/18 1000 0 1/1 1/3 1/5 1/7 1/9 1/11 1/13 1/15 1/17 1/19 1/21 1/23 1/25 1/27 1/29 1/31 2/2 2/4 2/6 2/8 2/10 2/12 2/14 2/16 2/18 2/20 2/22 2/24 2/26 2/28 Anderson Reservoir stops spilling on 2/28 Date * Preliminary – subject to revision 12

Ande rso n re duc e s pe a k flo ws SUBT I T L E 13 |

Sto rm c o o rdina tio n – F e b . 8-17, 2017 4 Ope ra tio na l a re a c o nfe re nc e c alls Upda ting stre a m fo re c a sts & g a ug e da ta Co o rdina ting c a lls with Sa n Jo se F e b. 14 & 15 Na tio na l We a the r Se rvic e (NWS) we binars I nfo rma tio n via We bE OC a nd e ma ils: Ove rto pping lo c a tio n ma p a nd list Owne rship/ jurisdic tio n ma ps 7,300 c fs inunda tio n ma ps 14 |

Sto rm Arrive s – F e b . 20-21, 2017 Distric t c re ws c he c k ho t spo ts, re mo ve de bris fro m b ridg e s, re pa ir fa c ilitie s Co ntinue d c o o rdina ting c a lls with Sa n Jo se a nd o the r a g e nc ie s, Sa n Jo se sta ff me mb e r imbe dde d in Distric t E OC Co yo te Ca na l re pa ire d F lo o d info rma tio n te a ms dispa tc he d. Hydro lo g ists c a lib ra ting g a ug e info rma tio n 15 |

Ac tio ns, c o llab o ratio n, & pro po se d so lutio ns Sho rt T e rm 1. E me rg e nc y Re spo nse Pla nning : • Jo int e me rg e nc y a c tio n pla n (E AP) with City o f Sa n Jo se • I mpro ve me nt o f the AL E RT we b site fo r Co yo te Cre e k • I nsta ll a dditio na l stre a mflo w g a ug e s a nd sta g e indic a to rs E xa mple o f a wa te r he ig ht sta g e indic a to r. 2. F lo w I mpro ve me nts: • No n-na tive ve g e ta tio n re mo va l • Co ntinue d ve g e ta tio n a nd se dime nt ma inte na nc e in impro ve d se c tio ns o f c re e ks Note: c re e k flo w impro ve me nts c a n o nly b e c o nduc te d if the y do no t wo rse n o r induc e flo o ding do wnstre a m. 16 Se dime nt re mo va l.

Ac tio ns, c o llab o ratio n, & pro po se d so lutio ns F lo o d risk re duc tio n a c tio ns to b e Coyote Creek Flood Protection c o nside re d b y Sa nta Cla ra Va lle y Wa te r Distric t Bo a rd o f Dire c to rs Sho rt T e rm: • I mme dia te a nd imple me nta b le flo o d re lie f so lutio ns • Pe rmitta b le a nd do no t c a use flo o ding e lse whe re I nte rme dia te to L o ng T e rm Me a sure s: • Upda te Mid-Co yo te Pro je c t pla nning study • Utilize lo c a l funds a nd se e k sta te a nd fe de ra l funding to c o mple te c o nstruc tio n 17

Gro up disc ussio n Que stio ns: 1. Wha t do yo u wa nt the wa te r distric t to kno w a b o ut the flo o ding ? 2. Wha t q ue stio ns do yo u ha ve fo r the wa te r distric t? 3. Ho w wo uld yo u like to re c e ive info rma tio n a b o ut future sto rm e ve nts? Gro up re po rt o ut: 1. Sha re wha t wa s disc usse d in yo ur g ro up with the re st o f a tte nde e s. 18

Ne xt ste ps Re spo nse fo llo w-up • Writte n a nswe rs to the que stio ns a ske d a t a ll thre e me e ting s will b e pro vide d in E ng lish, Spa nish, a nd Vie tna me se • Pro vide us with yo ur c o nta c t info rma tio n • Re spo nse s will b e po ste d o n wa te r distric t we bsite www. va lle ywa te r.o rg Que stio ns • I f yo u ha ve o the r q ue stio ns, ple a se fill o ut a c o mme nt c a rd o r se nd a n e ma il to flo o dsa fe @ va lle ywa te r.o rg • Wa te r distric t sta ff is a va ila b le to a nswe r q ue stio ns | 19

Me e ting Summa ry T hank yo u fo r yo ur q ue stio ns, time a nd pa rtic ipa tio n a s we disc usse d: 1. Re c o ve ry e ffo rts 2. E xtra o rdina ry ra in c o nditio ns o f Ja nua ry a nd F e b rua ry 3. Sto rm pre pa ra tio ns 4. Pro po se d sho rt, inte rme dia te , a nd lo ng te rm flo o d sa fe ty so lutio ns 20