CC 2017-01-24_09f 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: JANUARY 24, 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.
ANALYSIS OF ISSUES:
The drought continues, however, recent rainfall has provided 14.3” of rain since July 1,
2016 at the Corporation Yard gauge. Lopez Lake is currently at 26% capacity (13,104
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 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.
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
JANUARY 24, 2017
PAGE 2
In December the City’s water use was 48% below December 2013. The reduction
requirement imposed by the State Water Resources Control Board for Arroyo Grande is
28%.
Lopez Lake rose 5.9’ from January 4, 2017 to January 11, 2017. A total of 13,104 AF is
in storage. 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. December 2016 Water Supply and Demand Charts
2. Lopez Reservoir Storage Projections
3. Zone 3 - Lopez Project - Monthly Operations Report