CC 2015-10-27_08f Water Supply and Demand Update pRRO
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INCORPORATED �Z
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JULY 10, 1911
4�FORN�P MEMORANDUM
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TO: CITY COUNCIL
FROM: GEOFF ENGLISH, DIRECTOR OF PUBLIC WORKS
BY: SHANE TAYLOR, PUBLIC WORKS SUPERVISOR — UTILITIES
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: OCTOBER 27, 2015
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 approximately $500.
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 severe drought continues, however a new rainfall year began in July and we have
received 1.4" of rain. Lopez Lake is currently at 31% capacity. 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 is in advance of the Lake reaching 15,000 AF of storage, which is the automatic
reduction trigger.
In September the City's water use was 32% below September 2013. The reduction
requirement imposed by the State Water Resources Control Board for Arroyo Grande is
28%.
Item 8.f. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
OCTOBER 27, 2015
PAGE 2
Based on current use and weather patterns, Lopez Lake is predicted to reach the
15,000 AF storage level around November 1, 2015 unless the current weather pattern
changes. The Lopez supply for water year 2015/16 for Arroyo Grande is 2,942 AF,
which includes 883 AF of carry-over water. Based on the projected water demand of
2,300 AF, we expect to be able to meet the demand in water year 2015/16 with minimal
groundwater pumping.
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 in front of City Hall on Thursday, October 22, 2015. The
Agenda and staff report were posted on the City's website on Friday, October 23, 2015.
Attachments-
1. September 2015 Water Supply and Demand Charts
2. Lopez Reservoir Storage Projections
3. Zone 3 — Lopez Project— Monthly Operations Report, September 2015
Item 8.f. - Page 2
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Item 8.f. - Page 6