CC 2016-09-27_09d 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: SEPTEMBER 27, 2016
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 severe 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.
ANALYSIS OF ISSUES:
The exceptional drought continues. We have received 0.0” of rain since July 1, 2016 at
the Corporation Yard gauge. Lopez Lake is currently at 25% capacity (12,420 AF of
storage). The Low Reservoir Level Response Plan (LRRP) has been enacted.
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 have been voluntarily reducing deliveries by 20% since April 1,
2016 to keep the lake supply above the 10,000 AF level, which mandates an automatic
20% reduction retroactive back to April 1, 2016.
In August the City’s water use was 35% below August 2013. The reduction requirement
imposed by the State Water Resources Control Board for Arroyo Grande is 28%.
Item 9.d. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
SEPTEMBER 27, 2016
PAGE 2
Based on current use and weather patterns, Lopez Lake is predicted to reach the
10,000 AF storage level around December 1, 2016. The Lopez allotment 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. August 2016 Water Supply and Demand Charts
2. Lopez Reservoir Storage Projections
3. Zone 3 - Lopez Project - Monthly Operations Report
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