CC 2017-06-27_09g Monthly Water Supply_Demand Update_May2017
MEMORANDUM
TO: CITY COUNCIL
FROM: CHRISTOPHER MAGDOSKU, DIRECTOR OF PUBLIC WORKS
BY: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: JUNE 27, 2017
RECOMMENDATION:
It is recommended the City Council receive and file the monthly Water Supply and
Demand Report.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
Approximately two (2) hours of staff time is required to prepare the monthly report.
BACKGROUND:
On April 25, 2017, the City Council, by resolution, rescinded the Stage 1 Water
Shortage Emergency and related 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 also urged citizens to remain
cognizant of how they use water, and that the previously adopted permanent water
saving measures are still in effect.
In May, the City’s water use was 34% below May 2013. The States previously required
water use reduction was based on the 2013 water usage. There is currently no required
reduction imposed by the State Water Resources Control Board. The City however, is
still required to report monthly statistics to the State. Of note, the City’s water use in
May was up 4% from May 2016.
ANALYSIS OF ISSUES:
The United States Department of Agriculture (USDA) Drought Monitor, as of June 6,
2017, shows San Luis Obispo County as abnormally dry. Rain fall to date (July 1, 2016
to May 31, 2017) is 26.75 inches at the Corporation Yard gauge. Lopez Lake, as of
June 13, 2017, is at 61% capacity (30,368 acre-feet of storage).
At the County of San Luis Obispo Board of Supervisors meeting on May 23, 2017, the
Board rescinded the drought emergency proclamation. However, as recommended by
Item 9.g. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
JUNE 27, 2017
PAGE 2
the Zone 3 Advisory Board, the Board of Supervisors kept the Low Reservoir Response
Plan in place. This will allow carryover water to be available until March 30, 2018 to all
contractors. The new water year began on April 1, 2017 and the current total available
supply from Lopez is 2,290 acre-feet, our normal entitlement, plus 1,249 acre-feet of
carryover. 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.
Based on the projected water use of 2,500 acre-feet, we will meet the demand in water
year 2017/18, using only 50% of current supply.
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 Reservoir Storage Projections
2. Zone 3 – Lopez Project – Monthly Operations Report
Item 9.g. - Page 2
6.720.694.160.582.591.813.6214.439.061.691.570.240.080.030.020.3730,5040.002.004.006.008.0010.0012.0014.0016.0018.0020.004,0009,00014,00019,00024,00029,00034,00039,00044,00049,00012/1/20151/1/20162/1/20163/1/20164/1/20165/1/20166/1/20167/1/20168/1/20169/1/201610/1/201611/1/201612/1/20161/1/20172/1/20173/1/20174/1/20175/1/20176/1/20177/1/20178/1/20179/1/201710/1/2017Monthly Precipitation (in)Storage(AF)Notes:• For "Dry Months" (April ‐ October), projected increases and/or decreases in storage estimated to mimic conditions from 2015. • For "Wet Months" (November ‐ March), projected storage declines assume LRRP annual downstream release of 3,800 AFY and dLopez Reservoir Storage Projections(precipitation scenario source: www.LongRangeWeather.com)Actual PrecipitationProjected PrecipitationActual StorageProjected StoragePast 3 Year Avg. ProjectionStorage Without Carryover15,000 AF10,000 AFItem 9.g. - Page 3
ATTACHMENT 1Item 9.g. - Page 4