CC 2020-05-26_08h Monthly Water Supply and Demand Update_AprilMEMORANDUM
TO: CITY COUNCIL
FROM: BILL ROBESON, PUBLIC WORKS DIRECTOR
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: MAY 26, 2020
SUMMARY OF ACTION:
This update reports the water supply and demand for April 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On April 25, 2017, the City Council, by resolution, rescinded the Stage 1 Water Shortage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 April 2020, the City’s water use was 155.7 acre-feet with a per capita use of 96 gallons
per day/per person. There was a total of 1.77 inches of rainfall in April 2020. The water
use for the current “rolling” water year from May 2019 to April 2020 was 2,201 acre-feet,
which equates to a per capita use of 111 gallons per day/per person. There was a total
of 16.12 inches of rain fall for this period.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of May 14, 2020, shows San Luis Obispo County
as normal. Rainfall to date (July 1, 2019 to April 30, 2020) is 14.72 inches at the
Corporation Yard rain gauge. Lopez Lake, as of May 13, 2020, is at 51.5% capacity
(25,441 acre-feet of storage).
Item 8.h. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
MAY 26, 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 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 April 2020
1a. Lopez Monthly Operations Report for March 2019
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
4. Monitoring Report for April 2020
Item 8.h. - Page 2
San Luis Obispo County Flood Control and Water District
Zone 3 - Lopez Project - Monthly Operations Report
April, 2020
0.00
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.
153.33
April to Present
17.33
Arroyo Grande 2290
Lopez Dam Operations
Lake Elevation (full at 522.37 feet)491.25
Storage (full at 49200 acre feet)25696
Rainfall 3.02
Downstream Release (4200 acre feet/year)208.68
Spillage (acre feet)0
This Month Year to Date
208.68
0.00
911.00 153.33
Entl.Surplus
Water
Declared Usage
2290.00
Total
Available
Water
Lopez Water Deliveries
57.45Oceano CSD 303 121.00 57.45303.00
64.22Grover Beach 800 318.00 64.22800.00
177.83Pismo Beach 892 355.00 177.83892.00
6.63CSA 12 245 98.00 6.63245.00
136.27112039.00
8.96273.04
0.002270.00
State Water Deliveries
459.4645301803.00 459.464530.00 184.05150151.77Total
Contractor
Difference (feet)-31.12
% Full 52.2%
Comments:
1) Available Surplus Water shown is draft. Surplus Water will be Declared by the Board of Supervisors on June 2, 2020. Surplus
Water Requested is still to be determined.
2) Oceano supplied water to Canyon Crest via Arroyo Grande's Edna turn out. A total of 3.7 AF delivered to Canyon Crest was
added to Oceano's water usage this month and 3.7 AF was subtracted from Arroyo Grande's usage this month.
April to Present Lopez Entitlement+Surplus Water Usage
0
50
100
150
200
Jul '19 Aug
'19
Sep
'19
Oct
'19
Nov
'19
Dec
'19
Jan
'20
Feb
'20
Mar
'20
Apr
'20Acre FeetAG GB OCSD PB CSA12
January to Present State Water Usage
0
10
20
30
40
50
60
70
Jul
'19
Aug
'19
Sep
'19
Oct
'19
Nov
'19
Dec
'19
Jan
'20
Feb
'20
Mar
'20
Apr
'20Acre FeetOCSD PB CSA12 SanMig
San Miguelito 38.821279.73
This Month
%
Total
January to Present
Usage
This Month
% of
Annual
Request
Usage % of
Annual
Request 153.33
Total Water
Deliveries
This Month
57.45
64.22
216.83
9.67
9.73
511.23
Annual
Request
0.00
Usage
0.00
0.00
0.00
0.00
%
0.00
0.00
0.00
0.00
0.00
153.33
57.45
64.22
177.83
6.63
459.460.00 274.00
SWP
Deliveries
SWP
Deliveries
Change
in Storage
68 16.23
1546.20This Month Stored State Water
0.0%
6.7%6.7%
19.0%19.0%
8.0%8.0%
19.9%19.9%
2.7%2.7%
3.5%12.2%
11.3%33.2%
0.0%0.0%
10.1%10.1%3.4%12.3%
7.7%30.6%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
6.7%
19.0%
8.0%
19.9%
2.7%
10.1%0.0%
Entitlement Surplus
Usage %Usage %
Entitlement Surplus
Usage %
1529.97Last Month Stored State Water
Surplus
Requeste
d
0.00
0.00
0.00
0.00
0.00
0.00
Thursday, May 7, 2020 Page 1 of 1Report printed by:AdminData entered by:D. Bravo
ATTACHMENT 1
Item 8.h. - Page 3
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.h. - Page 4
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
2.14
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.h. - Page 5
176.4
155.7
109
96
0
20
40
60
80
100
120
140
160
180
200
Apr-19 Apr-20
Monthly Water Use Comparison
Acre Feet Usage (gpcd)
ATTACHMENT 3
Item 8.h. - Page 6
From: SWRCB Office Research, Planning & Performance mailto:drinc@waterboards.ca.gov
Sent: Wednesday, May 13, 2020 1:27 PM
To: Shane Taylor staylor@arroyogrande.org
Subject: Monitoring Report Acknowledgement for April 2020
Hello shane taylor
Thank you for your Monitoring Report. Below is the information you have submitted for the
month of April 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 0420
Stage/Mandatory 0 Yes
Days Outside Irrigation 4
Total Potable Water Production 155.7 AF
2013 Same Month Production 266.6 AF
CII Water 31.1 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 77
Number Complaints 0
Number Follow-ups 0
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.h. - Page 7
THIS PAGE INTENTIONALLY LEFT BLANK
Item 8.h. - Page 8