CC 2017-02-28_09e Monthly Water Supply and Demand Update
MEMORANDUM
TO: CITY COUNCIL
FROM: GEOFF ENGLISH, DIRECTOR OF PUBLIC WORKS
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: FEBRUARY 28, 2017
RECOMMENDATION:
It is recommended the City Council receive and review the monthly Water Supply and
Demand Report.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
The cost to provide the report is limited to staff time, which equates to approximately
$350.
BACKGROUND:
The drought continues to impact the City’s water supply and demand. As a result, the
City Council declared a Stage 1 Water Shortage Emergency on May 26, 2015. This
monthly update on the current supply and demand statistics will provide the Council with
the data required to make decisions related to Emergency Water Shortage Restrictions
and Regulations.
At the Zone 3 Advisory Board meeting on May 21, 2015, the Board recommended that
the deliveries from the Water Treatment Plant be reduced by 10% starting April 1, 2015.
This was in advance of the Lake reaching 15,000 AF of storage, which is the automatic
reduction trigger. We are voluntarily reducing deliveries by 20% to keep lake supply
above the 10,000 AF level, which mandates an automatic 20% reduction retroactive
back to April 1, 2016.
In January the City’s water use was 27% below January 2013. The reduction
requirement imposed by the State Water Resources Control Board for Arroyo Grande is
28%.
ANALYSIS OF ISSUES:
The drought has lessened to a level of moderate; however, recent rainfall has provided
22.7” of rain since July 1, 2016 at the Corporation Yard gauge. Lopez Lake, as of
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CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
FEBRUARY 28, 2017
PAGE 2
February 17, 2017 is at 46% capacity (23,000 AF of storage). The Low Reservoir Level
Response Plan (LRRP) is still enacted.
The Governor’s Emergency Regulation will remain in effect for an additional 270 days
starting February 8, 2017 or until the State Water Board finds that, “due to changed
conditions it is no longer necessary for the regulation to remain in effect” whichever
comes first.
Lopez Lake rose 20.4’ from January 18, 2017 to February 17, 2017. The Lopez supply
for water year 2016/17, which began April 1, 2016, for Arroyo Grande is 2,998 AF,
which includes 936 AF of carry-over water. Based on the projected water demand of
2,300 AF, we will meet the demand in water year 2016/17.
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. January 2017 Water Supply and Demand Charts
2. Lopez Reservoir Storage Projections
3. Zone 3 - Lopez Project - Monthly Operations Report
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ATTACHMENT 1
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ATTACHMENT 2
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ATTACHMENT 3
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