CC 2020-08-25_08g Monthly Water Supply and Demand Update_July 2020
MEMORANDUM
TO: CITY COUNCIL
FROM: BILL ROBESON, PUBLIC WORKS DIRECTOR
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: AUGUST 25, 2020
SUMMARY OF ACTION:
This update reports the water supply and demand for July 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On April 25, 2017, the City Council, by resolution, rescinded the Stage 1 Water Shortage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 July 2020, the City’s water use was 226.9 acre-feet with a per capita use of 135 gallons
per day/per person. There was a total of 0.0 inches of rainfall in July 2020. The water
use for the current “rolling” water year from August 2019 to July 2020 was 2,252 acre-
feet, which equates to a per capita use of 114 gallons per day/per person. There was a
total of 15.02 inches of rain fall for this period.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of August 6, 2020, shows San Luis Obispo County
as normal. Rainfall to date (July 1, 2020 to July 31, 2020) is 0.0 inches at the Corporation
Yard rain gauge. Lopez Lake, as of August 12, 2020, is at 46.9% capacity (23,185 acre-
feet of storage).
Item 8.g. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
AUGUST 25, 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, 111 acre-feet of surplus water from Lopez was requested. 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.
ALTERNATIVES:
Not applicable at this time.
ADVANTAGES:
No advantages noted at this time.
DISADVANTAGES:
No disadvantages noted 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 July 2020
1a. Lopez Monthly Operations Report for March 2020
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
4. Monitoring Report for July 2020
Item 8.g. - Page 2
San Luis Obispo County Flood Control and Water District
Zone 3 - Lopez Project - Monthly Operations Report
July, 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.
776.56
April to Present
0.00
Arroyo Grande 2290
Lopez Dam Operations
Lake Elevation (full at 522.37 feet)487.42
Storage (full at 49200 acre feet)23532
Rainfall 0
Downstream Release (4200 acre feet/year)182.6
Spillage (acre feet)0
This Month Year to Date
877.39
0.00
911.00 209.87
Entl.Surplus
Water
Declared Usage
2401.00
Total
Available
Water
Lopez Water Deliveries
260.86Oceano CSD 303 121.00 65.76624.00
261.11Grover Beach 800 318.00 64.97900.00
335.92Pismo Beach 892 355.00 77.721547.00
57.72CSA 12 245 98.00 12.10245.00
374.271120100.00
22.17275.46
0.002270.00
State Water Deliveries
1692.1745301803.00 430.425717.00 477.781501119.99Total
Contractor
Difference (feet)-34.95
% Full 47.8%
Comments:
1) Oceano supplied water to Canyon Crest via Arroyo Grande's Edna turn out. A total of 2.22 AF delivered to Canyon Crest was
added to Oceano's water usage this month and 2.22 AF was subtracted from Arroyo Grande's usage this month.
April to Present Lopez Entitlement+Surplus Water Usage
0
50
100
150
200
250
Jan '20 Feb '20 Mar '20 Apr '20 May '20 Jun '20 Jul '20Acre FeetAG GB OCSD PB CSA12
January to Present State Water Usage
0
20
40
60
80
100
120
Jan '20 Feb '20 Mar '20 Apr '20 May '20 Jun '20 Jul '20Acre FeetOCSD PB CSA12 SanMig
San Miguelito 81.3412714.53
This Month
%
Total
January to Present
Usage
This Month
% of
Annual
Request
Usage % of Annual
Request
209.87
Total Water
Deliveries
This Month
65.76
64.97
177.72
17.56
14.53
550.41
Annual
Request
0.00
Usage
0.00
0.00
0.00
0.00
%
0.00
0.00
0.00
0.00
0.00
776.56
260.86
261.11
335.92
57.72
1692.170.00 481.00
SWP
Deliveries
SWP
Deliveries
Change in
Storage
70 -49.99
1459.47This Month Stored State Water
0.0%
9.2%32.3%
21.7%41.8%
8.1%29.0%
8.7%21.7%
4.9%23.6%
8.9%33.4%
20.2%82.1%
0.0%0.0%
9.5%29.6%8.0%31.8%
11.4%64.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
0.0%
33.9%
86.1%
32.6%
37.7%
23.6%
37.4%0.0%
Entitlement Surplus
Usage %Usage %
Entitlement Surplus
Usage %
1509.46Last Month Stored State Water
Surplus
Requested
111.00
321.00
100.00
655.00
0.00
1187.00
Tuesday, August 11, 2020 Page 1 of 1Report printed by:AdminData entered by:D. Bravo
ATTACHMENT 1
Item 8.g. - Page 3
I
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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 1a
Item 8.g. - Page 4
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
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
0.24 0.00 0.00
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 ,T 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 . '.-0 00 !=> ':? ow !=> !=> 0 0 0 !=> 00 0 !=> 0 N 0 ~ 0 0 o!=> .i,: ,_. oO . '.-OU> 0 !=> OW ':? 00 0 ·-.j::, V, 0 0 0 0 !""' N 0 o ,_. !" "' -..J !""' w !" :E: ~ !'.J !""' w 0 . -"' 0 (o N 0 0 !" .j::, N ,_. ~ !" -..J ,_. 0 0 0 0 0 !.JJ "' w -..J !:" !.JJ en :s;: !.JJ "' !.JJ . en .j::, 0 0 w C -..J ,_. V, 0 0 0 0 .j::, 0 Storage (AF) N N w 0 V, 0 0 0 0 0 0 0 0 0 0 0 0 0 , l ? " '~ V, .j::, en 0 0 J I I ~ 00 0 0 V, J ' ' J \\ I J I I i\. '\. I ' , ,_. 0 0 0 ' J ,_. N 0 0 w V, 0 0 0 0 I I . 0 0 g )> -n I I V> .... Q OJ u~ 11) " ~ ro· ~ o· ~ I I V> .... Q OQ 11) " .2. 11) n ..... V :::, ~ :;o OJ :::, .j::, 0 0 0 0 0 I I -n C: ~ ~ 11) n .... OJ .... i5 -' -I "t ~ ~ ~ 11) !::! "E:! ~ 0 :::, I ~ ::!" ~ V ,i .... OJ OQ 11) I ! ~ C n .... ~ V s =' OQ 11) ,_. .j::, 0 0 ' 0 -0 m N :::0 m V) m :::0 < 0 :::0 V) -; 0 :::0 )> G) m -0 :::0 0 ,.__ m n -; 0 z
225.3 226.9
134 135
0
50
100
150
200
250
Jul-19 Jul-20
Monthly Water Use Comparison
Acre Feet Usage (gpcd)
ATTACHMENT 3
Item 8.g. - Page 6
■ ■
Thank you for your Monitoring Report. Below is the information you have submitted for
the month of July 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 0720
Stage/Mandatory 0 Yes
Days Outside Irrigation 4
Total Potable Water Production 226.9 AF
2013 Same Month Production 308.6 AF
CII Water 25 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 108
Number Complaints 0
Number Follow-ups 0
Number Warnings 0
Rate Penalties 0
Other Penalties 0
Enforcement Actions
Actions Taken
Implementation Comments
Qualification
State Water Resources Control Board Office of Research, Planning & Performance
ATTACHMENT 4
Item 8.g. - Page 7
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Item 8.g. - Page 8