BOARD OF DIRECTORS
David LaCaro
Judith Dietch
President
Director
Geoff English
Gwen Pelfrey
Vice-President
Director
Wayne Peterson
Director
STAFF
Jay Short
Jeff Briltz
Utilities Supervisor
General Manager
Natalie Klock
Bettina L. Mayer, P.E.
Finance Officer
District Engineer
Keith Aggson
Laurie A. Ion
Interim Fire Chief
Assistant to the GM/
Board Secretary
Melissa Johnson
Recreation Supervisor
TEMPLETON COMMUNITY SERVICES DISTRICT
P.O. BOX 780 • 420 CROCKER STREET • TEMPLETON, CA 93465 • (805) 434-4900 • FAX: (805) 434-4820
Where Does Our Water Come From?
DATE:
February 17, 2014
FROM:
Bettina L. Mayer, PE, District Engineer
The District relies on a combination of several different water sources to provide a sustainable
water supply to its customers. Water sources include deep aquifer groundwater, shallow
underflow water, and water supply augmentation though treated wastewater retrieval and
importation of Nacimiento raw water. The water enters the water system through 13 wells, all
located within the Templeton Subunit of the Atascadero Basin. The District’s current water
supply from all sources is approximately 2100 AFY and the District is capable of meeting the
seasonal average daily water demands of the District.
The Atascadero Basin has a distinct hydraulic separation from the main Paso Robles Basin at the
Rinconada fault as defined in the Paso Robles Groundwater Basin Study prepared by Fugro in
2002, and subsequent studies. The portion of the Atascadero Basin underlying District wells,
informally named the Templeton Subunit, has been further evaluated by FUGRO, the District’s
hydrogeologist, in its August 2013 updated report titled ‘Updated Templeton Subunit Study’.
The aquifer contains two primary water-bearing geologic units: the Paso Robles Formation, and
the Salinas River alluvial gravels. The deep, percolating groundwater wells located within the
Paso Robles Formation are generally referred to as ‘deep’ wells, and wells extracting the
underflow from the Salinas River alluvial gravels are referred to as the ‘river’ wells.
The water supply sources are further described below:
Percolating Ground Water -Deep Wells
The District extracts percolating groundwater from 10 active deep wells located throughout the
District. FUGRO recently completed a study of the District’s deep aquifer supply capability and
concluded that a perennial yield of 1040 acre-feet per year (AFY) may be may be used as an
operational guide for the 10 deep wells. This water is available year round, however these wells
are used primarily to meet summer demands.
Salinas Underflow -River Wells
The District has three river wells that divert water from the Salinas River underflow. The District
relies primarily on two river wells, the Smith River well, and the Creekside River Well. The third
river well is currently a standby emergency well only.
The District has several water rights for diversions of water from the Salinas River underflow
that includes two State Water Resources Control Board water permits and one water license.
The District also has several riparian rights agreements by which it provides water to customers
through its system and pumps the same amount of water from the underflow.
All together, the underflow water supply totals approximately 650 AFY.
Treated Wastewater Retrieval (also may be called Underflow Augmentation)
The District discharges treated wastewater into discharge ponds (Selby ponds) located adjacent
to the Salinas River where it is percolated into the underflow of the Salinas River. The water
may be retrieved, less 2%, 28 months later at the Smith River Well, or 35 months later at the
Creekside River Well. At the current average discharge of 150,000 gpd, this provides an
additional 164 AF of water available annually. Due to the locations of the two wells, all of the
water discharged at the Selby ponds can be retrieved during the summer pumping season from
April through October.
Nacimiento Water
The District began receiving raw Nacimiento water deliveries on June 23, 2011. The raw water is
also percolated into the underflow at the Selby ponds for subsequent retrieval downstream
Retrieval of the water at the Smith Well and Creekside Well will net approximately 245 ac-ft
annually. The Nacimiento water supplements the water supply during the peak summer season
and provides some additional source capacity for the District.
Current Supply
The District’s current available water supply from all sources is approximately 2100 AFY. During
the 2014 calendar year, District water production was 1350 AF. Actual water use peaks in July
and August when outdoor use is greatest and it can be over three times winter water use. At
this time, the District is capable of meeting the seasonal average daily water demands of the
District.
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