CC 2019-06-25_08d Monthly Water Supply and Demand Update_May 2019MEMORANDUM
TO: CITY COUNCIL
FROM: BILL ROBESON, PUBLIC WORKS DIRECTOR
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: JUNE 25, 2019
SUMMARY OF ACTION:
The update reports the water supply and demand for May 2019. Current Lopez Reservoir
level and projected levels are provided in the attachments.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
Approximately two (2) hours of staff time is required to prepare the report.
RECOMMENDATION:
It is recommended the City Council receive and file the monthly Water Supply and
Demand Report.
BACKGROUND:
On April 25, 2017, the City Council, by resolution, rescinded the Stage 1 Water Shortage
Emergency along with related emergency water conservation measures and restrictions.
During the public hearing the City Council requested staff to continue preparing the
monthly water supply and demand updates. The Council urged citizens to continue to
practice every day water saving measures, and reiterated that the previously adopted
water saving measures were to remain in effect.
In May 2019, the City’s water use was 179.9 acre-feet with a per capita use of 107 gallons
per day/per person. There was a total of 1.4” of rainfall in May. The water use for the
current “rolling” water year from June 2018 to May 2019 was 2,113 acre-feet, which
equates to a per capita use of 107 gallons per day/per person. There was a total of 19.35”
of rain fall for this period.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of June 11, 2019 shows San Luis Obispo County
in a normal condition. Rainfall to date (July 1, 2018 to June 14, 2019) is 19.35 inches at
the Corporation Yard rain gauge. Lopez Lake, as of June 14, 2019 is at 59.2% capacity
(29,256 acre-feet of storage).
Item 8.d. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
JUNE 25, 2019
PAGE 2
The new water year began on April 1, 2019 and the current total available supply from
Lopez is 2,290 acre-feet, our normal entitlement. In addition, we have 1,323 acre-feet of
ground water entitlement from the Santa Maria Basin and 200 acre-feet from the Pismo
Formation. The projected water use for 2019/20 is 2,200 acre-feet. In conclusion, based
on average rainfall for the next two years, the current supply will meet the projected
demand.
ADVANTAGES:
No advantages noted at this time.
DISADVANTAGES:
No disadvantages noted at this time.
ALTERNATIVES:
Not applicable at this time.
ENVIRONMENTAL REVIEW:
No environmental review is required for this item.
PUBLIC NOTIFICATION AND COMMENTS:
The Agenda was posted at City Hall and on the City’s website in accordance with
Government Code Section 54954.2.
Attachment:
1. Lopez Monthly Operations Report for May 2019
1a. Lopez Monthly Operations Report for March 2018
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
Item 8.d. - Page 2
San Luis Obispo County Flood Control and Water DistrictZone 3 - Lopez Project - Monthly Operations ReportMay, 20190.00Note: Deliveries are in acre feet. One acre foot = 325, 850 gallons or 43, 560 cubic feet. Safe yield is 8,730 acre feet."Year to Date" is January to present for State water, April to present for Lopez deliveries, and July to present for rainfall.349.31April to Present28.18Arroyo Grande2290Lopez Dam OperationsLake Elevation (full at 522.37 feet)497.2Storage (full at 49200 acre feet)29405Rainfall1.91Downstream Release (4200 acre feet/year)203.47Spillage (acre feet)0This MonthYear to Date376.860.00378.00179.56Entl.SurplusUsage2668.00TotalLopez Water Deliveries74.04Oceano CSD30350.0040.25353.00128.71Grover Beach800132.0064.58932.00153.10Pismo Beach892147.0061.601039.008.49CSA 1224540.004.08285.00385.55112068.0032.40278.4210.982270.00State Water Deliveries713.654530747.00350.075277.00470.30150186.82Total ContractorDifference (feet)-25.17% Full59.8%Comments:Available Surplus Water is shown and as designated per BOS May 14, 2019 Declaration of Surplus Water.1) Oceano supplied State Water to Canyon Crest via Arroyo Grande's Edna turn out. A totalof 1.62 AF delivered to Canyon Crest was added to Oceano's State Water usage this monthand 1.62 AF was subtracted from Arroyo Grande's usage this month.April to Present Lopez Entitlement+Surplus Water Usage050100150200Jul'18Aug'18Sep'18Oct'18Nov'18Dec'18Jan'19Feb'19Mar'19Apr'19May'19Acre FeetAGGBOCSDPBCSA12January to Present State Water Usage020406080100120Jul'18Aug'18Sep'18Oct'18Nov'18Dec'18Jan'19Feb'19Mar'19Apr'19May'19Acre FeetOCSDPBCSA12SanMigSan Miguelito41.3712710.40This Month%TotalJanuary to PresentUsageThis Month% of Annual RequestUsage% of Annual Request179.56Total Water Deliveries This Month40.2564.58129.612.510.4436.89Annual Request0.00Usage0.000.000.000.00%0.000.000.000.000.00349.3174.04128.71153.108.49713.650.00348.00SWP DeliveriesSWP DeliveriesChange in Storage68-18.821265.22This Month Stored State Water0.0%7.8%13.1%13.3%21.0%8.1%13.8%6.9%14.7%1.7%3.0%6.1%34.4%31.2%120.0%0.0%4.8%7.7%13.5%5.8%31.3%8.2%32.6%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%15.3%24.4%16.1%17.2%3.5%15.8%0.0%EntitlementSurplusUsage%Usage%EntitlementSurplusUsage%1284.04Last Month Stored State WaterMonday, June 10, 2019Page 1 of 1Report printed by:AdminData entered by:D. BravoATTACHMENT 1Item 8.d. - Page 3+----1 -, I I i------10~ 1□ ■ □ □ ■ 1□ □ ■ □ l I I I
ATTACHMENT 1a
Item 8.d. - Page 4
Con t1·:1<'tor
• .\n'OVO 0,>;11ldC
OccanoCS O
Orovcr B<ach
Pit,mo Bc:i.ch
CSA 12
San Miuudito
T o t:il
San Luis Ob is po County F lood C on trol and W ater D istrict
Zone 3 -L opez Projec t -:tvfon th ly Opera ti o ns Repo rt
M arch . 2 0 18
Lo pn WMH Dellw1·tes SUie WMH Dell11N1es
This Mouth .~l ro Ptt-sffil 'JlmMomb Ja11c;ay 10 Prtscnt
F.nll S::uplm; Tat.1.1 &itit ld,~t Snrp l ti\ f.J11l11!-n~111 $11rplm Tou l Amn n l Uut,e '., S\\'P ,ICluJW' IA u.u,, ,_,_ of Annwl SWP
""I""' ,-. Orliw 1:its St-O'l"3.ge Klq\lC'S( Oclivc!"ies U•s:i~ ,. Usage % U~_;: ~-u..,., " Usage ~-......
22:9<) l 249.20 3S39.20 l~.13 6.3 .. ~ 0.00 0.0'-' 2l46.32 93.1,. 0.00 o.o,:: 21~6.32 60.6¾
30 3 s,io so 1143 SO 0 00 o ~~ 5060 60"/e 303 10 1000,;, 401 39 4S I.,'. 70749 6 1 9"¼ 227 0 00 0 0,, 0 00 o~•
800 240.20 10-40.20 00.10 s.,,~ 0.00 0.0,:,;. 743.SS 93.<>~• 0.00 o.cr..· ?4S.8S 72.00/4
892 lSJ.UO 2n6.20 0.00 o.o,, 91.82 $J)~.i sn.oo 100.0,t 4$U7 2$J).,: 135() 17 495¾ 1120 19.00 1.r.-i 2800 2.5'-•
HS 499.60 7'1460 3.17 Ll'i 0.00 0 .0% S792 35..9% 0 .00 OJ).,'< 87.9 2 l l S¾ 27 6 .02 22.3% 16.12 597'-
127 8~9 7.Ut 20.SS 16.2,_
4~0 46<iJ..70 I 9 193.70 l U.4-0 1 .s.7%1 14?.4'.!: I .1.1¾ 4 178.19 9 '.!:.1% 80:?.t,6 I 1S.S%1 5-040.7~ I 54.8% 1~1 J ,t Ol 2 ... n, .,
I j'.!:.90 6'.67 4.J% 111 .00
Apr i l to Pre a nt LoP4z Entittem e nt +Surp t u~ W.iter Ugge
'11,r Moy J un J ul Aug 5eP Orel NOV De c Jan Feb M•
·1 1 ·11 ~, ·11 ·11 ·11 ·,1 ·11 ~1 "18 .,. ·18
l••c ■cs a ocso o PB ■csA12 I
~e; Dch,-meure ui J«c fe('f. Oot ocre foot = }2S. 8)0 g.,llons Ot ·0 . ;.cs.o ctib1c f«t. S.,f.e yidd 1s S. 73 0
acre fttt.
Lopu Oil.Ill O ~t·/IUOU1 l 'bh )ll)ulh \'till' tO Dalt
l..lkc Elenoon (full .1, 522.37 :t«c) 491.65 Dlftttcuce(tffl) I
SIOr.lge (full :it 49200 .IIOe fm:) 259),t %f ,dl I
R,inbll 8.69 12.67
D<mn~.)(11R¢-k.;..se(42003Ctt &eb)"t.v) 2,47.}5 )4364$
Spill:igt (x1t fm ) 0 0.00
-30.72
52.7'♦
Ula)(~ Slee-~ Swie \\'11111•,t ll4.I.Q9 I Th:.11 )!«.d/iS!/lll'td Su11e W•tter
J.inu.iry to Preant St.it• W.i ter Ugge
Ator May J u n Jul Aull ~P OCt NOY Dec Wl r e l> Mor
·11 '17 ·17 ~7 ·17 ,1 ·11 ,1 ·17 ·10 '18 '18
1 □0C SO D P8 ■CSA1 ?D ~n M I0 I
1176.0S
''Y c-ac to D..ue"' "J.mt.l.\1)1 10 ptestt)I' fuc ~Jtc w,ucr. Apnl to l)(C$('fil for lopc-z ckhvenes. Md July 10 prC$CUt
f(J(Q;ll'lfaII.
C~• 1s: Re.sct\·oo-1~ cwrtt1dy opcr.ncd uodct rhc Lo,,,.. Rescrvo11 Respon,;c PIJA Res<:f,,"Olf 1~ ,.bot,e
20.000 Af t:IIC'ld01t t101tductio11 Ul mlillmim:I°'. I
I Sucplm W3.ICC fflO\\'tl is acfll3lly ''Cati)' Orff" W3tct 3.~ cks.ignatcd tl ilic l.RRP IUld upducd
J:« R05 ?i.by 2, l017 Dtc.b rntion ofS11rpb ,;
1) Ocea::to ~upplit-d Sb.~I:' ~lt'1 IO C:llt)'OI' Ctl:'SI \UI .~l'~'OCit:'11:di"~ Edi:::t MD Olli. A 10(:'.IJ
of I .SS Af ddivned toCanym 0:~1 w.u addc,d to Oceino's Sb.le Wall'l u.,;age lliis mmtl,
:wt t .SS .AFwa, s'Ubl13.C1td from Arroyo Gr.tndt'i ~gc ttu., moutb.
Toc11I \\'a t l'r
De l in-,ic,.,
ru,Mon1b
);...,:.,
S06
00.1
ll0.82
919
8.99
m .s~
0.00 0.00 0.00 0.00 0.23
2.50
1.19
6.47
8.05
3.94
0.10
2.34
0.06 0.32
0.62
1.70
2.57
3.59 3.87
3.46
1.36
0.49
0.08 0.32
0.62
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
0.0
5000.0
10000.0
15000.0
20000.0
25000.0
30000.0
35000.0
40000.0
6/1/20187/1/20188/1/20189/1/201810/1/201811/1/201812/1/20181/1/20192/1/20193/1/20194/1/20195/1/20196/1/20197/1/20198/1/20199/1/201910/1/201911/1/2019Storage (AF)Date
LOPEZ RESERVOIR STORAGE PROJECTION
Actual Precipitation
Predicted Precipitation
Actual Storage
Predicted Storage
20,000 AF
Storage Projection
Note:
1. Storage projection is based on predicted rainfall from longrangeweather.com,
historic inflow based on predicted rainfall, 18-19 downstream release requests, and
municipal usage.
ATTACHMENT 2
Item 8.d. - Page 5
u:-
~
40000.0
35000.0
30000.0
25000.0
~ 20000.0
l'O ....
0
vi
15000.0
10000.0
5000.0
00
00 ....
0
N ........ .... ........
I.O
._
0 .1 6
0 DO o ~o
00 00 .... ....
0 0
N N ........ ........ .... .... ........ ........ ,.._ 00
LOPEZ RESERVOIR STORAGE PROJECTION
14.00 -I Actual )recipita I0n -I Predict 0 d Preci1 tation -•Actual torage 12 .00 -• Predict Pd Stora e --20,000 /\F
I ._ StoragE Projecti pn
~ -----
10.00
/i '5 --..........::: ---....... -'
8 00
b. I -r---------6 00
3.i 7 3 . l4
3 . 9 3 . 6 4 00
2 . ~o 2 .'7 2 . B4
1. 0 . ~ 2 00
1 9 --
0.12 o., 9 0.€2
0. 2 0 1 >3 0 0 0 .( 8 0 2 I 0. )0 0 1 )0 I 0.00
00 00 00 00 m m a, a, a, m m m m a, a, .... .... .... .... .... .... .... .... .... .... .... .... .... .... ....
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
N N N N N N N N N N N N N N N ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ .... .... .... .... .... .... .... .... .... .... .... .... .... .... .... ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ ........ m 0 .... N .... N C'l'l '<t L/'l I.O ,.._ 00 m 0 .... .... .... .... .... ....
Date
202.9179.9121107050100150200250May‐18 May‐19Monthly Water Use ComparisonAcre FeetUsage (gpcd)ATTACHMENT 3Item 8.d. - Page 6■ ■