CC 2018-09-25_09e Monthly Water Supply and Demand Update_August 2018MEMORANDUM
TO: CITY COUNCIL
FROM: SHANE TAYLOR, UTILITIES MANAGER
SUBJECT: MONTHLY WATER SUPPLY AND DEMAND UPDATE
DATE: SEPTEMBER 25, 2018
SUMMARY OF ACTION:
The update reports the water supply and demand for August 2018. Current Lopez
Reservoir level and projected levels are provided in the attachments.
IMPACT ON FINANCIAL AND PERSONNEL RESOURCES:
Approximately two (2) hours of staff time is required to prepare the report.
RECOMMENDATION:
It is recommended the City Council receive and file the monthly Water Supply and
Demand Report.
BACKGROUND:
On April 25, 2017, the City Council, by resolution, rescinded the Stage 1 Water Shortage
Emergency along with related emergency 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 urged citizens to continue to
practice every day water saving measures, and reiterated that the previously adopted
water conservation measures were to remain in effect.
In August 2018, the City’s water use was 221.3 acre-feet with a per capita use of 132
gallons per day/per person. There was a total of 0” of rainfall in August. The water use
for the current “rolling” water year from September 2017 to August 2018 was 2,312 acre-
feet, which equates to a per capita use of 117 gallons per day/per person.
ANALYSIS OF ISSUES:
The United States Drought Monitor, as of September 13, 2018 shows San Luis Obispo
County in a severe drought. Rainfall to date (July 1, 2018 to August 31, 2018) is 0 inches
at the Corporation Yard rain gauge. Lopez Lake, as of September 13, 2018, is at 45.1%
capacity (22,251 acre-feet of storage).
The new water year began on April 1, 2018 and the City’s current total available supply
from Lopez is 2,290 acre-feet, our normal entitlement plus 564 acre-feet of surplus water.
Item 9.e. - Page 1
CITY COUNCIL
MONTHLY WATER SUPPLY AND DEMAND UPDATE
SEPTEMBER 25, 2018
PAGE 2
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.
The projected water use for water year 2018/19 is 2,000 acre-feet if the City receives
average rainfall.
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 Monthly Operations Report for August 2018
1.a. Lopez Monthly Operations Report for March 2018
2. Lopez Reservoir Storage Projection
3. Monthly Water Use Comparison
Item 9.e. - Page 2
San Luis Obispo County Flood Control and Water DistrictZone 3 - Lopez Project - Monthly Operations ReportAugust, 20180.00Note: Deliveries are in acre feet. One acre foot = 325, 850 gallons or 43, 560 cubic feet. Safe yield is 8,730 acre feet."Year to Date" is January to present for State water, April to present for Lopez deliveries, and July to present for rainfall.996.33April to Present0.00Arroyo Grande2290Lopez Dam OperationsLake Elevation (full at 522.37 feet)484.84Storage (full at 49200 acre feet)22114Rainfall0Downstream Release (4200 acre feet/year)391.28Spillage (acre feet)0This MonthYear to Date1777.810.00564.00211.02Entl.SurplusUsage2854.00TotalLopez Water Deliveries218.56Oceano CSD30375.0043.82378.00313.64Grover Beach800197.0062.39997.00609.24Pismo Beach892220.00167.321112.0034.44CSA 1224560.007.37305.00205.002050.0058.3883.969.490.0000.00State Water Deliveries2172.2145301116.00491.925646.00332.56408.9622.15Total ContractorDifference (feet)-37.53% Full44.9%Comments:Surplus water shown is as designated per BOS May 15, 2018 Declaration of Surplus Water.1) Oceano supplied State Water to Canyon Crest via Arroyo Grande's Edna turn out. A total of 2.52 AF delivered to Canyon Crest was added to Oceano's State Water usage this monthand 2.52 AF was subtracted from Arroyo Grande's usage this month.April to Present Lopez Entitlement+Surplus Water Usage050100150200250Jan '18 Feb '18 Mar '18 Apr '18 May '18 Jun '18 Jul '18 Aug '18Acre FeetAGGBOCSDPBCSA12January to Present State Water Usage020406080Jan '18 Feb '18 Mar '18 Apr '18 May '18 Jun '18 Jul '18 Aug '18Acre FeetOCSDPBCSA12SanMigSan Miguelito69.1812012.66This Month%TotalJanuary to PresentUsageThis Month% of Annual RequestUsage% of Annual Request211.02Total Water Deliveries This Month43.8262.39167.3216.8612.66514.07Annual Request0.00Usage0.000.000.000.00%0.000.000.000.000.00996.33218.56313.64609.2434.442172.210.00456.00SWP DeliveriesSWP DeliveriesChange in Storage8158.851253.19This Month Stored State Water0.0%9.2%34.9%14.5%57.8%7.8%31.5%18.8%54.8%3.0%11.3%0.0%100.0%11.3%69.5%0.0%0.0%10.9%38.5%5.4%81.3%10.6%57.7%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%0.0%43.5%72.1%39.2%68.3%14.1%48.0%0.0%EntitlementSurplusUsage%Usage%EntitlementSurplusUsage%1194.34Last Month Stored State WaterThursday, September 13, 2018Page 1 of 1Report printed by:AdminData entered by: D. SpiegelATTACHMENT 1Item 9.e. - Page 31• • • • • • • • l I I I
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Item 9.e. - Page 4
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196.7221.3117132050100150200250Aug‐17 Aug‐18Monthly Water Use ComparisonAcre FeetUsage (gpcd)ATTACHMENT 3Item 9.e. - Page 6• •