CC 2020-04-28_08g - Monthly Water Supply and Demand Update_March
MEMORANDUM
TO: CITY COUNCIL
FROM: BILL ROBESON, PUBLIC WORKS DIRECTOR
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: APRIL 28, 2020
SUMMARY OF ACTION:
The update reports the water supply and demand for March 2020. 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On April 25, 2017, the City Council, by resolution, rescinded the Stage 1 Water Shortage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 March 2020, the City’s water use was 139.7 acre-feet with a per capita use of 83 gallons
per day/per person. There was a total of 5.85” of rainfall in March 2020. The water use
for the current “rolling” water year from April 2019 to March 2020 was 2,222 acre-feet,
which equates to a per capita use of 112 gallons per day/per person. There was a total
of 14.7” of rain fall for this period.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of April 9, 2020 shows San Luis Obispo County
as normal. Rainfall to date (July 1, 2019 to March 31, 2020) is 12.95 inches at the
Corporation Yard rain gauge. Lopez Lake, as of April 15, 2020 is at 52.3% capacity
(25,817 acre-feet of storage).
Item 8.g. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
APRIL 28, 2020
PAGE 2
The new water year began on April 1, 2020 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 160 acre-feet from the Pismo
Formation. In addition, there will also be 911 acre-feet of surplus water from Lopez
available. The projected water use for the last water year, 2019/20, was 2,200 acre-feet.
The projected water use for 2020/21 is 2,300 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.
Attachments:
1. Lopez Monthly Operations Report for March 2020
1a. Lopez Monthly Operations Report for March 2019
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
4. Monitoring Report for March 2020
Item 8.g. - Page 2
San Luis Obispo County Flood Control and Water District
Zone 3 - Lopez Project - Monthly Operations Report
March, 2020
727.00
Note: 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.
2122.35
April to Present
14.31
Arroyo Grande 2290
Lopez Dam Operations
Lake Elevation (full at 522.37 feet)490.87
Storage (full at 49200 acre feet)25472
Rainfall 5.37
Downstream Release (4200 acre feet/year)207.46
Spillage (acre feet)0
This Month Year to Date
2736.22
0.00
378.00 139.74
Entl.Surplus
Water
Declared Usage
2290.00
Total
Available
Water
Lopez Water Deliveries
624.35Oceano CSD 303 50.00 0.00624.35
787.22Grover Beach 800 132.00 64.00820.00
1297.65Pismo Beach 892 147.00 0.001297.65
86.34CSA 12 245 40.00 7.19245.00
97.27112023.84
5.92272.04
0.002270.00
State Water Deliveries
4917.914530747.00 210.935277.00 132.28150135.14Total
Contractor
Difference (feet)-31.50
% Full 51.8%
Comments:
Available Surplus Water is shown and as designated per BOS May 14, 2019 Declaration of Surplus Water. Beginning with July 2019
report, Surplus Water Requested is amount purchased by each agency. Surplus Water used is based on Surplus Water Requested.
1) Oceano supplied water to Canyon Crest via Arroyo Grande's Edna turn out. A total of 1.5 AF delivered to Canyon Crest was
added to Oceano's water usage this month and 1.5 AF was subtracted from Arroyo Grande's usage this month.
On 2/7/2020 Pismo requested the remaining 127 AF of surplus water (SurW) in addition up to 90 AF of Oceano’s SurW if needed for
March, 2020. In March, Pismo used 78.65 AF of Oceano's remaining SurW.
Pismo Surplus = 200 AF (original) + 127AF (Total remaining SurW) + 78.65 (Oceano's remaining SurW Requested) = 405.65 AF.
San Miguelito 29.091279.26
This Month
%
Total
January to Present
Usage
This Month
% of
Annual
Request
Usage % of Annual
Request
139.74
Total Water
Deliveries
This Month
48.07
64
102.49
9.23
9.26
372.79
Annual
Request
0.00
Usage
48.07
0.00
78.65
0.00
%
0.00
321.35
0.00
405.65
0.00
2122.35
303.00
787.22
892.00
86.34
4190.91126.72 136.00
SWP
Deliveries
SWP
Deliveries
Change in
Storage
1459.97This Month Stored State Water
97.3%
6.1%92.7%
0.0%100.0%
8.0%96.0%
0.0%100.0%
2.9%35.2%
2.1%8.7%
7.6%21.9%
0.0%0.0%
4.7%93.2%2.3%8.8%
7.3%22.9%
0.0%
15.0%
0.0%
19.4%
0.0%
0.0%
100.0%
0.0%
100.0%
0.0%
92.7%
100.0%
98.4%
100.0%
35.2%
92.5%17.0%
Entitlement Surplus
Usage %Usage %
Entitlement Surplus
Usage %
Last Month Stored State Water
Surplus
Requested
0.00
321.35
20.00
405.65
0.00
747.00
Friday, April 3, 2020 Page 1 of 1Report printed by:AdminData entered by:D. Bravo
ATTACHMENT 1
Item 8.g. - Page 3
I
April to Present Lopez Entitlement+Surplus Water Usage
Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar
'19 '19 '19 '19 '19 '19 '19 '19 '19 '20 '20 '20
l □ AG ■GB DOCSD □PB ■CSA12 I
I I
I I
San Luis Obispo County Flood Control and Water District
Zone 3 - Lopez Project - Monthly Operations Report
March, 2019
304.04
Note: 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.
2084.03
April to Present
26.11
Arroyo Grande 2290
Lopez Dam Operations
Lake Elevation (full at 522.37 feet)496.59
Storage (full at 49200 acre feet)29008
Rainfall 5.19
Downstream Release (4200 acre feet/year)196.41
Spillage (acre feet)0
This Month Year to Date
3830.12
0.00
564.00 124.37
Entl.Surplus
Usage
2854.00
Total
Lopez Water Deliveries
378.00Oceano CSD 303 75.00 0.00378.00
809.04Grover Beach 800 197.00 57.71997.00
1112.00Pismo Beach 892 220.00 0.001112.00
74.13CSA 12 245 60.00 2.80305.00
278.55112098.50
15.78275.55
10.9822710.98
State Water Deliveries
4457.2045301116.00 184.885646.00 327.811501122.80Total
Contractor
Difference (feet)-25.78
% Full 59.0%
Comments:Surplus water shown is as designated per BOS May 15, 2018 Declaration of Surplus Water.
1) Oceano supplied State Water to Canyon Crest via Arroyo Grande's Edna turn out. A total
of 1.1 AF delivered to Canyon Crest was added to Oceano's State Water usage this month
and 1.1 AF was subtracted from Arroyo Grande's usage this month.
April to Present Lopez Entitlement+Surplus Water Usage
0
50
100
150
200
250
Apr
'18
May
'18
Jun
'18
Jul
'18
Aug
'18
Sep
'18
Oct
'18
Nov
'18
Dec
'18
Jan
'19
Feb
'19
Mar
'19Acre FeetAG GB OCSD PB CSA12
January to Present State Water Usage
0
20
40
60
80
100
120
Apr
'18
May
'18
Jun
'18
Jul
'18
Aug
'18
Sep
'18
Oct
'18
Nov
'18
Dec
'18
Jan
'19
Feb
'19
Mar
'19Acre FeetOCSD PB CSA12 SanMig
San Miguelito 22.501277.77
This Month
%
Total
January to Present
Usage
This Month
% of
Annual
Request
Usage % of Annual
Request
124.37
Total Water
Deliveries
This Month
30.6
66.75
98.5
8.35
7.77
336.34
Annual
Request
0.00
Usage
19.62
9.04
0.00
0.00
%
0.00
75.00
9.04
220.00
0.00
2084.03
303.00
800.00
892.00
74.13
4153.1628.66 205.00
SWP
Deliveries
SWP
Deliveries
Change in
Storage
76 -46.80
1264.71This Month Stored State Water
27.2%
5.4%73.0%
0.0%100.0%
7.2%81.1%
0.0%100.0%
1.1%24.3%
8.8%24.9%
20.6%58.4%
4.8%4.8%
4.1%78.9%8.2%21.8%
6.1%17.7%
0.0%
26.2%
4.6%
0.0%
0.0%
0.0%
100.0%
4.6%
100.0%
0.0%
91.0%
100.0%
100.0%
100.0%
30.3%
91.7%2.6%
Entitlement Surplus
Usage %Usage %
Entitlement Surplus
Usage %
1311.51Last Month Stored State Water
Friday, April 5, 2019 Page 1 of 1Report printed by:AdminData entered by:D. Bravo
ATTACHMENT 1a
Item 8.g. - Page 4
~u.rn
1° ■ 0 0 ■ I 1° 0 ■ 0 I
I I
I I
2.50
1.19
6.47
8.05
3.94
0.10
2.34
0.00 0.00 0.00 0.00 0.00
2.19
5.44
0.54
0.00
4.70
1.70
2.57
3.59 3.87
3.46
1.13
0.41 0.08 0.03 0.00 0.30 0.62
1.70
2.57
3.59 3.87
3.46
1.13
0.41 0.09 0.03 0.08 0.44
0.99
2.17
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
11/1/201812/1/20181/1/20192/1/20193/1/20194/1/20195/1/20196/1/20197/1/20198/1/20199/1/201910/1/201911/1/201912/1/20191/1/20202/1/20203/1/20204/1/20205/1/20206/1/20207/1/20208/1/20209/1/202010/1/202011/1/202012/1/2020Storage (AF)Date
LOPEZ RESERVOIR STORAGE PROJECTION
Actual Precipitation Predicted Precipitation Actual Storage Predicted Storage
20,000 AF Storage Projection Storage Projection (No Rain)
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.g. - Page 511/1/2018 12/1/2018 1/1/2019 2/1/2019 3/1/2019 4/1/2019 5/1/2019 6/1/2019 7/1/2019 8/1/2019 9/1/2019 10/1/2019 0 11/1/2019 QJ ,... ro 12/1/2019 1/1/2020 2/1/2020 3/1/2020 4/1/2020 5/1/2020 6/1/2020 7/1/2020 8/1/2020 9/1/2020 10/1/2020 11/1/2020 12/1/2020 0 0 0 0 0 0 0 0 . .... oO . ._ oOO 9 e ow 0 0 . ._ 0 0 09 00 0 9 0 N 0 i,. 0 0 9 .... 0 ._ .:0 0 ._ w e 00 9 .i,. l/1 0 0 0 0 .... N 0 o .... N '° -..J !""-' w !" ~ !"°-' N !""-' w 0 ._ '° 0 (o N 0 0 N .... ~ !" -..J .... 0 0 0 0 0 w '° !-" -..J !-" !-" mi;: !-" '° w . er, .i,. 0 0 w C -..J .... l/1 0 0 0 0 cf:> c3 Storage (AF) N N w 0 l/1 0 0 0 0 0 0 0 0 0 0 0 0 0 , l ~, '~ !,/1 E °' 0 0 I I 1/ 00 0 0 l/1 j I ' J j , \\ j J I I ~ "' , .... 0 0 0 ' J .... N 0 0 w l/1 0 0 0 0 I I 0 0 0 0 )> -n I I V> ,... Q DJ u~ ro ,J ri ro· n ,... 5· ~ I I V> ,... Q OQ ro ,J -2. ro n ,..._ .., :J ? :,:J DJ :J .i,. 0 0 0 0 0 I I -~ C ~ ~ ro n ,... DJ ,... 0 ...J -I -.: ~ ~ -.: ro n !1 ~ 0 :J I ; n :;! ~ V ~ DJ OQ ro I I -.: :'! a n ,... ~ V 0 :"! OQ ro .... .i,. 0 0 ' 0 -0 m N :::0 m (./) m :::0 < 0 :::0 (./) -; 0 :::0 )> G) m -0 :::0 0 ..... m n -; 0 z
130.4
139.7
78
83
0
20
40
60
80
100
120
140
160
Mar-19 Mar-20
Monthly Water Use Comparison
Acre Feet Usage (gpcd)
ATTACHMENT 3
Item 8.g. - Page 6
■ ■
From: SWRCB Office Research, Planning & Performance [mailto:drinc@waterboards.ca.gov]
Sent: Wednesday, April 15, 2020 1:07 PM
To: Shane Taylor <staylor@arroyogrande.org>
Subject: Monitoring Report Acknowledgement for March 2020
Hello shane taylor
Thank you for your Monitoring Report. Below is the information you have submitted for the
month of March 2020. If this information is incorrect, you can edit the report or re-submit your
report for the month with the corrected information. We use your most recently submitted
monthly report in our calculations.
Reporter shane taylor
Urban Water Supplier(Number) Arroyo Grande City of (608)
Reporting Month 0320
Stage/Mandatory 0 Yes
Days Outside Irrigation 4
Total Potable Water Production 139.7 AF
2013 Same Month Production 230.1 AF
CII Water 15.4 AF
Commercial Agricultural Water 0 AF
Commercial Agricultural Water 2013 0 AF
Recycled Water 0 AF
Non-revenue Water AF
Residential Use Percentage 80 %
Population 17636
Estimated R-GPCD 67
Number Complaints 1
Number Follow-ups 1
Number Warnings 0
Rate Penalties 0
Other Penalties 0
Enforcement Actions
Actions Taken
Implementation Comments
Qualification
To edit your report click HERE (After logging in, select the report to edit, click on “Edit”, make
your corrections, and click on “Update” when finished)
State Water Resources Control Board Office of Research, Planning & Performance
ATTACHMENT 4
Item 8.g. - Page 7
THIS PAGE INTENTIONALLY LEFT BLANK
Item 8.g. - Page 8