CC 2024-05-28_09e Monthly Water Supply and Demand
MEMORANDUM
TO: City Council
FROM: Bill Robeson, Assistant City Manager/Public Works Director
BY: Shane Taylor, Utilities Manager
SUBJECT: Monthly Water Supply and Demand Update
DATE: May 28, 2024
RECOMMENDATION:
Receive and file the Monthly Water Supply and Demand Update.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
Approximately two (2) hours of staff time is required to prepare the report.
BACKGROUND:
The
st
April 1. The current water supply for water year 2024/2025 includes 2,290 Acre Feet
from Lopez Reservoir, the current modeled, safe yield is 357-Acre Feet of groundwater
from the Santa Maria River Groundwater Basin, with an entitlement of 1323 Acre Feet.
An additional 160 Acre Feet of groundwater is available from the Pismo formation.
The predicted water use for 2024/2025 water year is 2,100 Acre Feet.
In April 2024 th
per day/per person. The residential per capita use was 67 gallons per day/per person.
There was a total of 2.57 inches of rainfall in the City in April 2024.
Attachment 3 shows cur
information point.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of May 16, 2024, shows San Luis Obispo County
is not in a drought. Rainfall for the period of July 1, 2023, through May 16, 2024, is 18.40
inches at the Corporation Yard rain gauge. Lopez Lake is at 100.1% capacity as of May
Item 9.e.
City Council
Monthly Water Supply and Demand Update
May 28, 2024
Page 2
16, 2024. The lake began spilling on February 7, 2024, and stopped spilling on May 9,
2024.
The deep well index for the second quarter of 2024 was completed on April 17, 2024, and
is 13.81 feet above sea level, which is 6.31 feet above the threshold value. The current
deep well index is 1.48 feet higher than January 2024, and 1.58 feet higher than April
2023.
ALTERNATIVES:
1. Receive and file the report, or
2. Provide other directions to staff.
ADVANTAGES:
The report provides the City Council and the public with the current and projected
conditions of our water supply and demand.
ENVIRONMENTAL REVIEW:
No environmental review is required for this item.
PUBLIC NOTIFICATION AND COMMENTS:
ccordance with
Government Code Section 54954.2.
ATTACHMENTS:
1. Monthly Operations Report
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
4. Deep Well Index Levels
Item 9.e.