CC 2019-03-26_08h Water Supply and Demand Update_Feb 2019MEMORANDUM
TO: CITY COUNCIL
FROM: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: MARCH 26, 2019
SUMMARY OF ACTION:
The update reports the water supply and demand for February 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On April 25, 2017, the City Council, by Resolution, rescinded the Stage 1 Water Shortage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 everyday water saving measures, and reiterated that the previously adopted
water conservation measures were to remain in effect.
In February 2019, the City’s water use was 111.0 acre-feet with a per capita use of 73
gallons per day/per person. There was a total of 5.9 inches of rainfall in February 2019.
The water use for the current “rolling” water year from March 2018 to February 2019 was
2,135 acre-feet, which equates to a per capita use of 108 gallons per day per person.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of March 15, 2019 shows San Luis Obispo County
as normal! Rainfall to date (July 1, 2018 to March 15, 2019) is 16.9 inches at the
Corporation Yard rain gauge. Lopez Lake, as of March 15, 2019, is at 57% capacity
(28,100 acre-feet of storage).
The new water year began on April 1, 2018 and the City’s current total available supply
from Lopez is 2,290 acre-feet, our normal entitlement plus 564 acre-feet of surplus water.
Item 8.h. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
MARCH 26, 2019
PAGE 2
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 water year 2018/19 was 2,000 acre-feet. With two weeks left
in the current water year, the projected use will be 2,120 acre-feet.
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 February 2019
1.a. Lopez Monthly Operations Report for March 2018
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
Item 8.h. - Page 2
San Luis Obispo County Flood Control and Water District
Zone 3 - Lopez Project - Monthly Operations Report
February, 2019
275.38
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.
1959.66
April to Present
20.92
Arroyo Grande 2290
Lopez Dam Operations
Lake Elevation (full at 522.37 feet)488.69
Storage (full at 49200 acre feet)24214
Rainfall 8.45
Downstream Release (4200 acre feet/year)168.94
Spillage (acre feet)0
This Month Year to Date
3633.71
0.00
564.00 110.96
Entl.Surplus
Usage
2854.00
Total
Lopez Water Deliveries
358.38Oceano CSD 303 75.00 0.00378.00
742.29Grover Beach 800 197.00 60.33997.00
1112.00Pismo Beach 892 220.00 0.001112.00
71.33CSA 12 245 60.00 3.36305.00
241.431120145.36
10.23274.46
0.002270.00
State Water Deliveries
4243.6645301116.00 174.655646.00 266.391501156.87Total
Contractor
Difference (feet)-33.68
% Full 49.2%
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 0.98 AF delivered to Canyon Crest was added to Oceano's State Water usage this month
and 0.98 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
'19Acre FeetAG GB OCSD PB CSA12
January to Present State Water Usage
0
50
100
150
200
Apr
'18
May
'18
Jun
'18
Jul
'18
Aug
'18
Sep
'18
Oct
'18
Nov
'18
Dec
'18
Jan
'19
Feb
'19Acre FeetOCSD PB CSA12 SanMig
San Miguelito 14.731277.05
This Month
%
Total
January to Present
Usage
This Month
% of
Annual
Request
Usage % of Annual
Request
110.96
Total Water
Deliveries
This Month
17.61
60.33
145.36
7.82
7.05
349.13
Annual
Request
0.00
Usage
17.61
0.00
0.00
0.00
%
0.00
55.38
0.00
220.00
0.00
1959.66
303.00
742.29
892.00
71.33
3968.2817.61 129.00
SWP
Deliveries
SWP
Deliveries
Change in
Storage
67 -89.87
1250.13This Month Stored State Water
24.7%
4.8%68.7%
0.0%94.8%
7.5%74.5%
0.0%100.0%
1.4%23.4%
13.0%21.6%
16.5%37.9%
0.0%0.0%
3.9%75.2%10.5%17.7%
5.6%11.6%
0.0%
23.5%
0.0%
0.0%
0.0%
0.0%
73.8%
0.0%
100.0%
0.0%
85.6%
100.0%
92.8%
100.0%
29.1%
87.6%1.6%
Entitlement Surplus
Usage %Usage %
Entitlement Surplus
Usage %
1340Last Month Stored State Water
Wednesday, March 6, 2019 Page 1 of 1Report printed by:AdminData entered by:D. Spiegel
ATTACHMENT 1
Item 8.h. - Page 3
ATTACHMENT 1a
Item 8.h. - Page 4
0.20 7.76 0.22 0.00 0.00 0.00 0.00 0.00 0.23 2.501.196.478.050.440.060.320.621.702.573.593.873.460.002.004.006.008.0010.0012.0014.000.05000.010000.015000.020000.025000.030000.035000.040000.02/1/20183/1/20184/1/20185/1/20186/1/20187/1/20188/1/20189/1/201810/1/201811/1/201812/1/20181/1/20192/1/20193/1/20194/1/2019Storage (AF)DateLOPEZ RESERVOIR STORAGE PROJECTIONActualPrecipitationPredictedPrecipitationActual StoragePredicted StorageNote:1. Storage projection is based on predicted rainfall from longrangeweather.com,historic inflow based on predicted rainfall, 18‐19 downstream release requests, andmunicipal usage.2. Municipal Usage is based on 2010‐2017 average monthly deliveries.ATTACHMENT 2Item 8.h. - Page 5
163.911110873020406080100120140160180Feb‐18Feb‐19Monthly Water Use ComparisonAcre FeetUsage (gpcd)ATTACHMENT 3Item 8.h. - Page 6