LAFCO
Water Districts
Read the report at Local Agency Formation Commissions ↗
MUNICIPAL SERVICE REVIEW AND
SPHERE OF INFLUENCE UPDATE FOR:
DEL PUERTO,
EASTIN, EL SOLYO,
AND OAK FLAT
WATER DISTRICTS
PATTERSON AND
WEST STANISLAUS
IRRIGATION
DISTRICTS
Prepared By:
Stanislaus Local Agency Formation Commission
1010 Tenth Street, Third Floor
Modesto, CA 95354
Phone: (209) 525-7660
Adopted: February 24, 2021
STANISLAUS
LOCAL AGENCY FORMATION COMMISSION
COMMISSIONERS
Vito Chiesa, County Member
Terry Withrow, County Member
Mani Grewal, Alternate County Member
Amy Bublak, City Member
Javier Lopez, City Member
Richard O’Brien, Alternate City Member
William Berryhill, Public Member
Brad Hawn, Alternate Public Member
STAFF
Sara Lytle-Pinhey, Executive Officer
Javier Camarena, Assistant Executive Officer
Jennifer Vieira, Commission Clerk
Alice Mimms, Legal Counsel
TABLE OF CONTENTS
Introduction ..........................................................................................................1
Municipal Service Review Factors to be Addressed ........................................................ 1
Sphere of Influence Update Process ............................................................................... 2
Sphere of Influence Determinations ................................................................................. 2
Background ..................................................................................................................... 2
Authority .......................................................................................................................... 3
Purpose ........................................................................................................................... 3
Classification of Services ................................................................................................. 3
Del Puerto Water District .....................................................................................4
Formation ........................................................................................................................ 4
Governance ..................................................................................................................... 4
Mission Statement ........................................................................................................... 4
Location and Size ............................................................................................................ 4
Sphere of Influence ......................................................................................................... 4
Personnel ........................................................................................................................ 4
Services .......................................................................................................................... 4
Programs ......................................................................................................................... 5
Support Agencies ............................................................................................................ 5
Funding Sources ............................................................................................................. 5
Municipal Service Review Determinations - Del Puerto Water District ........................... 6
Growth and Population Projections .................................................................................. 6
Location and Characteristics of Disadvantaged Unincorporated Communities ................ 6
Present and Planned Capacity of Public Facilities, Adequacy of Public Services ............ 6
Financial Ability of Agencies to Provide Services ............................................................. 7
Status of, and Opportunities for, Shared Facilities ........................................................... 7
Accountability for Community Service Needs .................................................................. 7
Any Other Matter Related to Effective or Efficient Service Delivery ................................. 7
Sphere of Influence Determinations - Del Puerto Water District...................................... 8
Present and Planned Land Uses ..................................................................................... 8
Present and Probable Need for Public Facilities and Services ......................................... 8
Present Capacity of Public Facilities and Adequacy of Public Services ........................... 8
Communities of Interest in the Area ................................................................................. 8
Need for Public Facilities in Disadvantaged Unincorporated Communities ...................... 8
District Map ......................................................................................................................... 9
District Summary Profile .................................................................................................. 10
Eastin Water District ......................................................................................... 11
Formation ...................................................................................................................... 11
Governance ................................................................................................................... 11
Location and Size .......................................................................................................... 11
Sphere of Influence ....................................................................................................... 11
Personnel ...................................................................................................................... 11
Services ........................................................................................................................ 11
Support Agencies .......................................................................................................... 11
Funding Sources ........................................................................................................... 11
TABLE OF CONTENTS (Cont.)
Municipal Service Review Determinations - Eastin Water District ................................... 12
Growth and Population Projections ................................................................................ 12
Location and Characteristics of Disadvantaged Unincorporated Communities .............. 12
Present and Planned Capacity of Public Facilities, Adequacy of Public Services .......... 12
Financial Ability of Agencies to Provide Services ........................................................... 12
Status of, and Opportunities for, Shared Facilities ......................................................... 12
Accountability for Community Service Needs ................................................................ 12
Any Other Matter Related to Effective or Efficient Service Delivery ............................... 12
Sphere of Influence Determinations - Eastin Water District ........................................... 13
Present and Planned Land Uses ................................................................................... 13
Present and Probable Need for Public Facilities and Services ....................................... 13
Present Capacity of Public Facilities and Adequacy of Public Services ......................... 13
Communities of Interest in the Area ............................................................................... 13
Need for Public Facilities in Disadvantaged Unincorporated Communities .................... 13
District Map ....................................................................................................................... 14
District Summary Profile................................................................................................... 15
El Solyo Water District ...................................................................................... 16
Formation ...................................................................................................................... 16
Governance ................................................................................................................... 16
Location and Size .......................................................................................................... 16
Sphere of Influence ....................................................................................................... 16
Personnel ...................................................................................................................... 16
Services ........................................................................................................................ 16
Support Agencies .......................................................................................................... 16
Funding Sources ........................................................................................................... 16
Municipal Service Review Determinations - El Solyo Water District ............................. 17
Growth and Population Projections ................................................................................ 17
Location and Characteristics of Disadvantaged Unincorporated Communities .............. 17
Present and Planned Capacity of Public Facilities, Adequacy of Public Services .......... 17
Financial Ability of Agencies to Provide Services ........................................................... 17
Status of, and Opportunities for, Shared Facilities ......................................................... 17
Accountability for Community Service Needs ................................................................ 18
Any Other Matter Related to Effective or Efficient Service Delivery ............................... 18
Sphere of Influence Determinations - El Solyo Water District ....................................... 19
Present and Planned Land Uses ................................................................................... 19
Present and Probable Need for Public Facilities and Services ....................................... 19
Present Capacity of Public Facilities and Adequacy of Public Services ......................... 19
Communities of Interest in the Area ............................................................................... 19
Need for Public Facilities in Disadvantaged Unincorporated Communities .................... 19
District Map ....................................................................................................................... 20
District Summary Profile................................................................................................... 21
TABLE OF CONTENTS (Cont.)
Oak Flat Water District ...................................................................................... 22
Formation ...................................................................................................................... 22
Governance ................................................................................................................... 22
Location and Size .......................................................................................................... 22
Sphere of Influence ....................................................................................................... 22
Personnel ...................................................................................................................... 22
Services ........................................................................................................................ 22
Support Agencies .......................................................................................................... 22
Funding Sources ........................................................................................................... 22
Municipal Service Review Determinations - Oak Flat Water District ............................. 23
Growth and Population Projections ................................................................................ 23
Location and Characteristics of Disadvantaged Unincorporated Communities .............. 23
Present and Planned Capacity of Public Facilities, Adequacy of Public Services .......... 23
Financial Ability of Agencies to Provide Services ........................................................... 23
Status of, and Opportunities for, Shared Facilities ......................................................... 23
Accountability for Community Service Needs ................................................................ 24
Any Other Matter Related to Effective or Efficient Service Delivery ............................... 24
Sphere of Influence Determinations - Oak Flat Water District ....................................... 25
Present and Planned Land Uses ................................................................................... 25
Present and Probable Need for Public Facilities and Services ....................................... 25
Present Capacity of Public Facilities and Adequacy of Public Services ......................... 25
Communities of Interest in the Area ............................................................................... 25
Need for Public Facilities in Disadvantaged Unincorporated Communities .................... 25
District Map ....................................................................................................................... 26
District Summary Profile .................................................................................................. 27
Patterson Irrigation District .............................................................................. 28
Formation ...................................................................................................................... 28
Governance ................................................................................................................... 28
Location and Size .......................................................................................................... 28
Sphere of Influence ....................................................................................................... 28
Personnel ...................................................................................................................... 28
Services ........................................................................................................................ 28
Programs ....................................................................................................................... 29
Support Agencies .......................................................................................................... 29
Funding Sources ........................................................................................................... 30
Municipal Service Review Determinations - Patterson Irrigation District ..................... 31
Growth and Population Projections ................................................................................ 31
Location and Characteristics of Disadvantaged Unincorporated Communities .............. 31
Present and Planned Capacity of Public Facilities, Adequacy of Public Services .......... 31
Financial Ability of Agencies to Provide Services ........................................................... 32
Status of, and Opportunities for, Shared Facilities ......................................................... 32
Accountability for Community Service Needs ................................................................ 32
Any Other Matter Related to Effective or Efficient Service Delivery ............................... 32
TABLE OF CONTENTS (Cont.)
Sphere of Influence Determinations - Patterson Irrigation District ................................ 33
Present and Planned Land Uses ................................................................................... 33
Present and Probable Need for Public Facilities and Services ....................................... 33
Present Capacity of Public Facilities and Adequacy of Public Services ......................... 33
Communities of Interest in the Area ............................................................................... 33
Need for Public Facilities in Disadvantaged Unincorporated Communities .................... 33
District Map ....................................................................................................................... 34
District Summary Profile................................................................................................... 35
West Stanislaus Irrigation District ................................................................... 36
Formation ...................................................................................................................... 36
Governance ................................................................................................................... 36
Location and Size .......................................................................................................... 36
Sphere of Influence ....................................................................................................... 36
Personnel ...................................................................................................................... 36
Services ........................................................................................................................ 36
Programs ....................................................................................................................... 36
Support Agencies .......................................................................................................... 37
Funding Sources ........................................................................................................... 38
Municipal Service Review Determinations - West Stanislaus Irrigation District .......... 39
Growth and Population Projections ................................................................................ 39
Location and Characteristics of Disadvantaged Unincorporated Communities .............. 39
Present and Planned Capacity of Public Facilities, Adequacy of Public Services .......... 39
Financial Ability of Agencies to Provide Services ........................................................... 39
Status of, and Opportunities for, Shared Facilities ......................................................... 39
Accountability for Community Service Needs ................................................................ 40
Any Other Matter Related to Effective or Efficient Service Delivery ............................... 40
Sphere of Influence Determinations - West Stanislaus Irrigation District ..................... 41
Present and Planned Land Uses ................................................................................... 41
Present and Probable Need for Public Facilities and Services ....................................... 41
Present Capacity of Public Facilities and Adequacy of Public Services ......................... 41
Communities of Interest in the Area ............................................................................... 41
Need for Public Facilities in Disadvantaged Unincorporated Communities .................... 41
District Map ....................................................................................................................... 42
District Summary Profile .................................................................................................. 43
References ......................................................................................................... 44
Municipal Service Review and Sphere of Influence Update
For the Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts;
and the Patterson and West Stanislaus Irrigation Districts
Introduction
The Cortese/Knox/Hertzberg Local Government Reorganization Act of 2000 Act (CKH Act)
requires the Local Agency Formation Commission (LAFCO) to update the spheres of influence
(SOI) for all applicable jurisdictions in the County. A sphere of influence is defined by
Government Code 56076 as “...a plan for the probable physical boundary and service area of a
local agency, as determined by the Commission.” The Act further requires that a municipal
service review (MSR) be conducted prior to or, in conjunction with, the update of a sphere of
influence (SOI).
Stanislaus LAFCO generally prepares municipal service reviews and sphere of influence
updates concurrently for efficient use of time and resources. The current review will cover six
irrigation and water districts located on the west side of Stanislaus County:
Del Puerto Water District Oak Flat Water District
Eastin Water District Patterson Irrigation District
El Solyo Water District West Stanislaus Irrigation District
Municipal Service Review Factors to be Addressed
The legislative authority for conducting a municipal service review is provided in Government
Code Section 56430 of the CKH Act. The Act states that municipal service reviews must have
written determinations that address the following factors. These factors were recently amended
to include the consideration of disadvantaged unincorporated communities within or contiguous
to the sphere of influence of an agency.
1. Growth and Population Projections for the Affected Area
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
3. Present and Planned Capacity of Public Facilities, Adequacy of Public Services, and
Infrastructure Needs or Deficiencies Including Needs or Deficiencies Related to Sewers,
Municipal and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
4. Financial Ability of Agencies to Provide Services
5. Status of, and Opportunities for, Shared Facilities
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 1
Sphere of Influence Update Process
A special district is a government agency that is required to have an adopted and updated
sphere of influence. Section 56425(g) of the CKH Act calls for spheres of influence to be
reviewed and updated every five years, as necessary. Stanislaus LAFCO processes municipal
service reviews and sphere of influence updates concurrently to ensure efficient use of
resources. For rural special districts, which do not have the typical municipal-level services to
review, this document will be used to determine what type of services each district is expected
to provide and the extent to which they are able to do so. For these special districts, the
spheres will delineate the service capability and expansion capacity of the agency, if applicable.
The most recent update for the irrigation and water districts in this report was adopted in 2009.
The current update serves to comply with Government Code Section 56425 and will reaffirm the
SOIs for each district.
Sphere of Influence Determinations
In determining a sphere of influence (SOI) of each local agency, the Commission shall consider
and prepare determinations with respect to each of the following factors, pursuant to
Government Code Section 56425:
1. The present and planned land uses in the area, including agricultural and open-space
lands.
2. The present and probable need for public facilities and services in the area.
3. The present capacity of public facilities and adequacy of public services that the agency
provides or is authorized to provide.
4. The existence of any social or economic communities of interest in the area if the
commission determines that they are relevant to the agency.
5. For an update of a sphere of influence of a city or special district that provides public
facilities or services related to sewers, municipal and industrial water, or structural fire
protection, the present and probable need for those public facilities and services of any
disadvantaged unincorporated communities within the existing sphere of influence.
Background
Throughout the years, water and California have been linked. No resource is more vital to
California than water, from the agricultural areas, urban centers, and industrial plants, to open
space and recreational areas, the distribution of water has been critical to all land uses.
In California, there are hundreds of special districts with a great diversity of purposes,
governance structures, and financing mechanisms. Some districts are responsible for one type
of specific duty, as in the case of the water and irrigation districts reviewed in this report, while
other districts provide a wide range of public services.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 2
Authority
This review will cover the following single-purpose water and irrigation districts, each of which
are geographically located on the western portion of Stanislaus County: Eastin, El Solyo, Oak
Flat and the Del Puerto Water Districts; and the Patterson and West Stanislaus Irrigation
Districts. The four water districts are organized under the California Water Code, Division 13,
§34000-38501, while the two irrigation districts are organized under Division 11, §20500-29978
of the California Water Code.
The water districts are landowner-voter districts, as their board members are elected by
landowners within the respective district’s boundaries. The irrigation districts are registered
voter districts with board members elected by the registered voters within the respective
district’s boundaries.
Purpose
Water districts are formed for purposes such as to: produce, store and distribute water for
irrigation, domestic, industrial and municipal uses; drain and reclaim lands; collect, treat and
dispose of sewage, waste and storm water; generate hydroelectric power; allocate water to
crops and acreage; and protect groundwater from contamination.
The purposes of irrigation districts are to: furnish water for, and put water to any beneficial use;
provide drainage; develop and distribute electric power; allocate water according to crops and
acreage; sewage disposal (upon approval); and protect groundwater from contamination.
Classification of Services
This service review includes a listing of services provided within each of the Districts
boundaries. The water and irrigation districts are authorized to provide the functions or classes
of services (e.g. irrigation water) as identified in this report. State Law requires that the Districts
seek LAFCO approval in order to exercise any other latent powers not currently provided.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 3
DEL PUERTO WATER DISTRICT
Formation
The Del Puerto Water District was originally formed on March 24, 1947 and included only about
3,500 acres. The District was reorganized on January 20, 1995 to include ten other local
districts which held similar water service contracts with the U.S. Bureau of Reclamation for their
water supply. The reorganization provided an increased level of service to the properties within
the new district boundaries and reduced the duplication of efforts by the participating districts.
Governance
A seven-member Board of Directors governs the District. Board Members must be District
landowners and are elected by landowners from divisions located within District boundaries.
Meetings are open to the public and held on the third Wednesday of each month at 8:30 a.m., at
the District office, which is located at 17840 Ward Avenue, Patterson, California.
Mission Statement
The District has adopted the following mission statement: “The Del Puerto Water District is
dedicated to providing its agricultural customers with an adequate, reliable and affordable water
supply.”
Location and Size
The District’s boundary currently encompasses approximately 52,800 acres (43,000 irrigable),
located on the western most edge of the San Joaquin River Basin, running parallel with
Interstate 5 (I-5) and stretching approximately 50 miles in length between the City of Tracy to
the north, and the Santa Nella/I-5 Interchange to the south. While the District’s boundaries are
within three counties (Merced, Stanislaus and San Joaquin), the majority of the territory is
located in Stanislaus County. Therefore, Stanislaus LAFCO is considered the principal LAFCO
for the processing of changes of organization involving the District.
Sphere of Influence
The District’s Sphere of Influence is coterminous with its current boundaries. No amendments
to the District’s boundaries or sphere of influence are being proposed with this Municipal
Service Review and Sphere of Influence Update.
Personnel
There are six full-time employees for the District.
Services
Under a contract with the United States Department of Interior - Bureau of Reclamation (USBR),
the District provides agricultural water to landowners within its boundaries, and by agreement to
one landowner whose lands have been detached from the District. Water is provided by way of
the Delta-Mendota Canal, a feature of the Central Valley Project, and is delivered to customers
canal-side through turnouts licensed to the District by the federal government. The District’s
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 4
contract authorizes the delivery of up to 140,210 acre-feet of water annually. District lands have
produced more than 30 different crops over the years, including almonds, tomatoes, apricots,
dry beans, walnuts, alfalfa, grains, melons, citrus, cherries, broccoli, cauliflower and bell
peppers.
The District actively engages in local, regional, and statewide efforts to secure additional water
supplies as needed to help meet customer demand. These supplies, when available, are
purchased by the District, marketed and delivered at rates intended to recoup District costs. As
the cost of these supplies has risen, and their availability lessened, District landowners have
relied on the fallowing of productive lands or use of groundwater where available.
Programs
The District administers several programs to assist its customers in meeting agricultural
conservation and drainage requirements, including the State Revolving Fund Loan Program and
the Agricultural Drainage Loan Program, which provide low-interest loans for high-efficiency
irrigation system improvements which also serve to reduce irrigation drainage.
Support Agencies
The District maintains positive and collaborative relationships with other agencies, authorities,
and associations, such as neighboring irrigation districts, including Patterson, West Stanislaus,
and Central California Irrigation Districts, the Oak Flat Water District, as well as the Delta-
Mendota Canal Contractors Authority, the San Luis & Delta-Mendota Water Authority, the San
Joaquin Valley Drainage Authority, the Central Valley Project Water Association, the
Association of California Water Agencies, and the U.S. Bureau of Reclamation (USBR).
The District is part of the DM-II Groundwater Sustainability Agency (GSA). The GSA represents
communities, water districts, and other entities in portions of Merced and Stanislaus Counties
which are outside of other GSA boundaries but within county limits in the Delta-Mendota
Subbasin. The GSA along with eight other GSAs have adopted a Groundwater Sustainability
Plan for the Northern and Central Delta-Mendota Region of the Subbasin in compliance with the
Sustainable Groundwater Management Act (SGMA) of 2014.
Funding Sources
The District recovers its administrative expenses through an annual acreage assessment on
irrigable lands within the District, designated as a Water Availability Charge. The volumetric
Water Rate charged to users is effectively a pass-through charge intended to recoup the various
rates and charges the District must pay for each unit of water it delivers. The District does not
collect any share of County property tax revenues.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 5
Municipal Service Review Determinations - Del Puerto Water District
The following are determinations related to the seven factors required by Section 56430 for a
Service Review for the Del Puerto Water District:
1. Growth and Population Projections for the Affected Area
The District serves an area that is unincorporated and agricultural, lying on the western
portion of Stanislaus County and portions of San Joaquin and Merced counties. The area is
designated as Agriculture on the respective county general plans and, while certain areas
within the District are being considered for their development potential, the District does not
expect any significant population growth during the five-year timeframe of the current
service review. The District currently serves 200 small family farm landowners.
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
There are no known disadvantaged unincorporated communities within the boundaries or
Sphere of Influence of the Del Puerto Water District. The community of Crows Landing is
contiguous to the easterly boundary of the District.
3. Present and Planned Capacity of Public Facilities and Adequacy of Public Services,
Including Infrastructure Needs or Deficiencies Related to Sewers, Municipal Water
and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
Irrigation water is provided from the Delta-Mendota Canal and delivered canal-side from
turnouts. In recognition of long-term water supply shortages associated with the District’s
contracted water supplies, the District has agreed to participate in the financing of certain
Statewide and regional infrastructure improvement projects including the Delta-Mendota
Canal/California Aqueduct Intertie project and the Orestimba Creek Recharge and Recovery
Project. The District has also initiated discussions with neighboring agencies aimed at
identifying and developing integrated resource management opportunities that may exist.
Some of these opportunities may require new or improved water-related infrastructure
including local and regional water conveyance and delivery systems.
The District recently completed an environmental impact report for the Del Puerto Canyon
Reservoir (DPCR) west of Patterson. The proposed DPCR involves the construction and
operation of a reservoir on Del Puerto Creek to provide approximately 82,000 acre-feet (AF)
of new off-stream storage to the Central Valley Project (CVP). Project components are the
reservoir, conveyance facilities to transport water to/from the Delta-Mendota Canal,
electrical facilities, relocation of Del Puerto Canyon Road, and relocation of existing and
proposed utilities that within the project area.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 6
4. Financial Ability of Agencies to Provide Services
The District is in sound financial shape and has the necessary resources to fund its current
level of service to its customers under normal budgetary conditions. Rates and fees for
services are developed during the District’s annual budget review and adoption process and
are designed to be sufficient to recover all costs. Ongoing drought and regulatory
restrictions on pumping have caused water costs to increase dramatically for the District’s
landowners in recent years.
5. Status of, and Opportunities for, Shared Facilities
The District currently shares a reservoir for drainage water recapture with the Patterson
Irrigation District and Central California Irrigation District, and as noted previously is pursuing
the concept of a shared surface storage reservoir with the neighboring water service
agencies.
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
The District is governed by a seven-member Board of Directors. Board members must be
District landowners and are elected by landowners from divisions within District boundaries.
The Board is subject to the provision of the Brown Act requiring open meetings. The District
operates in an efficient and professional manner. Additionally, the District is subject to State
Law AB-1234, requiring biennial ethics training, and the Political Reform Act, requiring the
maintenance and biennial review of a Conflict-of-Interest Code for board members. Though
dependent upon the economic viability of its agricultural customer base, it is reasonable to
conclude that the District can adequately serve the territory under its jurisdiction.
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
In 2009, the State Water Resources Control Board approved a temporary consolidation of
State Water Project (SWP) and Central Valley Project (CVP) places of use. While this
consolidation could be seen as facilitating the transfer of available water supplies between
the Del Puerto District (a CVP contractor) and the Oak Flat Water District (a SWP
contractor), other constraints continue to limit the benefits that might accrue to the District
from the increased efficiency and flexibility in the source of water supplies and/or points of
delivery.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 7
Sphere of Influence Determinations – Del Puerto Water District
The following determinations for the Del Puerto Water District’s Sphere of Influence update and
are made in conformance with Government Code Section 56425 and local Commission policy.
1. Present and Planned Land Uses in the Area, Including Agricultural and Open-Space
Lands
The Del Puerto Water District’s Sphere of Influence (SOI) includes approximately 52,800
acres. Territory within and outside the District boundaries consists of agricultural and rural
residential land uses. These uses are not expected to change. In addition, the District does
not have the authority to make land use decisions, nor does it have authority over present or
planned land uses within its boundaries. The responsibility for land use decisions within the
District boundaries is retained by the counties of Stanislaus, San Joaquin, and Merced.
2. Present and Probable Need for Public Facilities and Services in the Area
The need for irrigation water to agricultural lands within the District is not expected to
change; however, with the conversion of more District acreage to high-value, permanent
cropping patterns, demand has become hardened and water users will not be able to
achieve significant reductions in current water use.
3. Present Capacity of Public Facilities and Adequacy of Public Services that the
Agency Provides or is Authorized to Provide
The District recently adopted a final environmental impact report for the Del Puerto Canyon
Reservoir project in order to provide additional water storage for the District and State Water
Project. The District has the necessary infrastructure and contract for the provision of
agricultural water service to areas within its existing Sphere of Influence.
4. The Existence of Any Social or Economic Communities of Interest in the Area if the
Commission Determines That They are Relevant to the Agency
The City of Patterson is considered a community of interest as a portion of City’s Sphere of
Influence overlaps the District’s boundary. Upon submittal of specific development plans,
these lands will be requested to detach from the District and the water supply previously
allocated to serve these lands will revert to the District for redistribution to remaining District
lands.
5. For an Update of a Sphere of Influence of a City or Special District That Provides
Public Facilities or Services Related to Sewers, Municipal and Industrial Water, or
Structural Fire Protection, the Present and Probable Need for Those Public Facilities
and Services of Any Disadvantaged Unincorporated Communities Within the Existing
Sphere of Influence
As the District does not provide services related to sewers, municipal and industrial water or
structural fire protection, this factor is not applicable.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 8
DEL PUERTO WATER DISTRICT
Boundary & Sphere of Influence
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 9
DEL PUERTO WATER DISTRICT
DISTRICT SUMMARY PROFILE
Location: Along the westernmost edge of the San Joaquin River Basin, parallel to
Interstate 5 (I-5) and stretching approximately 50 miles in length between
the City of Tracy to the north, and the Santa Nella (I-5) Interchange to the
South.
Service Area: Approximately 52,800 acres (44,000 irrigable)
Population*: Approximately 650
Land Use: Agricultural
Date of Formation: March 24, 1947 (original formation), January 20, 1995 (reorganization to
include 10 other districts)
Enabling Act: California Water Code, Division 13, Section 34000 et. seq. (Water District
Act)
Governing Body: 7 Directors (landowner election)
Administration: 6 full-time employees
District Services: Distribution and administration of irrigation water
Total Operating
Budget: Year ending February 29, 2020: $15,768,766
Revenue Sources: Water fees and assessments
*LAFCO Staff Estimate
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 10
EASTIN WATER DISTRICT
Formation
The Eastin Water District was formed by LAFCO on July 11, 2000.
Governance
The governing Board consists of three directors elected by the landowners within the District.
Location and Size
The District encompasses approximately 3,520 acres, and is comprised of two separate areas,
generally located east of Interstate 5 and west of State Highway 33, north of the Stanislaus
County line.
The District serves an area that is unincorporated and has a designation of “Agriculture” in the
Stanislaus County General Plan.
Sphere of Influence
The District’s Sphere of Influence is coterminous with its current boundaries. No amendments
to the District’s boundaries or sphere of influence are being proposed with this Municipal
Service Review and Sphere of Influence Update.
Personnel
The District does not employ any personnel at this time.
Services
The District is still in the process of establishing contracts with other water providers in order to
deliver irrigation water to the agricultural landowners within the District.
Support Agencies
The District maintains positive collaborative relationship with other agencies, including the
Central California Irrigation District. The District is part of the Northwestern Delta-Mendota
Groundwater Sustainability Agency (GSA). The GSA represents communities, water districts,
and other entities in portions of Merced and Stanislaus Counties which are outside of other GSA
boundaries but within county limits in the Delta-Mendota Subbasin. The GSA along with eight
other GSAs have adopted a Groundwater Sustainability Plan for the Northern and Central Delta-
Mendota Region of the Subbasin in compliance with the Sustainable Groundwater Management
Act (SGMA) of 2014.
Funding Sources
Once the District has secured the water needed for its future customers, fees and/or
assessments will be applied to the individual landowner, based upon the cost of delivering
irrigation water. The District does not collect any share of the county property taxes.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 11
Municipal Service Review Determinations - Eastin Water District
The following are determinations related to the seven factors required by Section 56430 for a
Service Review for the Eastin Water District:
1. Growth and Population Projections for the Affected Area
The District is located in an unincorporated area of the County and is designated Agriculture
on the County’s General Plan. The City of Newman’s Sphere of Influence lies along the
easterly side of the District, south of Stuhr Road. The District consists of large parcels that
are used for large scale farming operations. At this time, no growth is anticipated.
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
Upon review of available Census data, there are no known disadvantaged unincorporated
communities within or contiguous to the District’s Sphere of Influence.
3. Present and Planned Capacity of Public Facilities and Adequacy of Public Services,
Including Infrastructure Needs or Deficiencies Related to Sewers, Municipal Water
and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
The District is still in the process of securing necessary contracts for surface water and has
not yet begun to provide irrigation water to its customers. Landowners within the District
currently rely on groundwater wells for irrigation.
4. Financial Ability of Agencies to Provide Services
Once the District has secured the water needed for its future customers, fees and/or
assessments will be applied to the individual landowner, based upon the cost of delivering
irrigation water. The District does not collect any share of the county property taxes.
5. Status of, and Opportunities for, Shared Facilities
Although the District is contiguous to other irrigation water providers and infrastructure, the
lack of water supply has stymied the ability for the District to secure a surface water source.
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
The governing Board for the District consists of three members and meets on an as-needed
basis. Members of the Board stay apprised through the County’s Water Advisory
Committee. The District is subject to State Law AB-1234, requiring biennial ethics training,
and the Political Reform Act, requiring adoption, maintenance and biennial review of a
Conflict-of-Interest Code for board members.
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
None.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 12
Sphere of Influence Determinations - Eastin Water District:
The following determinations for the Eastin Water District’s Sphere of Influence update are
made in conformance with Government Code Section 56425 and local Commission policy:
1. Present and Planned Land Uses in the Area, Including Agricultural and Open-Space
Lands
The Eastin Water District’s Sphere of Influence (SOI) includes approximately 3,520 acres.
Territory within the District boundaries consists of agricultural and rural residential land use
areas. These uses are not expected to change. In addition, the District does not have the
authority to make land use decisions, nor does it have authority over present or planned
land uses within its boundaries. The responsibility for land use decisions within the District
boundaries is retained by the County.
2. Present and Probable Need for Public Facilities and Services in the Area
Although the District has not yet secured a contract or agreement for water supply, the
existence of the District allows the ability for its landowners to participate in the
Northwestern Delta-Mendota GSA.
3. Present Capacity of Public Facilities and Adequacy of Public Services that the
Agency Provides or is Authorized to Provide
The District is still in the process of establishing contracts with other water providers in order
to deliver irrigation water to the landowners within the District.
4. The Existence of Any Social or Economic Communities of Interest in the Area if the
Commission Determines That They are Relevant to the Agency
There are no communities of interest within the District boundaries. The City of Newman’s
Sphere of Influence lies just east of the District’s boundary.
5. For an Update of a Sphere of Influence of a City or Special District That Provides
Public Facilities or Services Related to Sewers, Municipal and Industrial Water, or
Structural Fire Protection, the Present and Probable Need for Those Public Facilities
and Services of Any Disadvantaged Unincorporated Communities Within the Existing
Sphere of Influence
As the District does not provide services related to sewers, municipal and industrial water or
structural fire protection, this factor is not applicable.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 13
EASTIN WATER DISTRICT
Boundary & Sphere of Influence
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 14
EASTIN WATER DISTRICT
DISTRICT SUMMARY PROFILE
Location: Two areas, east of Interstate 5, west of State Highway 33, between Pete
Miller Road and Crow Creek.
Service Area: Approximately 3,520 acres
Population*: 125
Land Use: Agricultural
Date of Formation: July 11, 2000
Enabling Act: California Water Code, Division 13, Section 34000 et. seq. (Water District
Act)
Governing Body: 3 Directors elected by the landowners within the District
Administration: No employees
District Services: None. The District is still in the process of securing water from other
agencies. However, the District was formed to provide irrigation water to
land within the District’s boundaries.
Total Operating
Budget: $0
Revenue Sources: None
* LAFCO Staff Estimate
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 15
EL SOLYO WATER DISTRICT
Formation
The El Solyo Water District was formed on August 17, 1959.
Governance
A five-member Board of Directors governs the District and is elected by landowners within the
District. Meetings are open to the public and held on the third Wednesday of each month at 9:00
a.m., at the District office located at 542 Center Road, in Vernalis.
Location and Size
The District encompasses approximately 4,060 acres and is located south of State Highway
132, east of McCracken Road, north of Gaffery Road and west of the San Joaquin River, near
the unincorporated community of Vernalis.
The District is comprised of land mostly designated Agriculture in the Stanislaus County General
Plan.
Sphere of Influence
The District’s Sphere of Influence is coterminous with its current boundaries. No amendments
to the District’s boundaries or sphere of influence are being proposed with this Municipal
Service Review and Sphere of Influence Update.
Personnel
The District employs 2 full-time persons.
Services
Under a pre-1914 water rights contract, the District distributes irrigation water to its customers
via the San Joaquin River.
Support Agencies
The District is part of the Northwestern Delta-Mendota Groundwater Sustainability Agency
(GSA). The GSA represents communities, water districts, and other entities in portions of
Merced and Stanislaus Counties which are outside of other GSA boundaries but within county
limits in the Delta-Mendota Subbasin. The GSA along with eight other GSAs have adopted a
Groundwater Sustainability Plan for the Northern and Central Delta-Mendota Region of the
Subbasin in compliance with the Sustainable Groundwater Management Act (SGMA) of 2014.
Funding Sources
The District’s source of revenue is based upon water rate charges, or user fees, which are
collected based upon the cost of the water and its delivery to landowners within the District
boundaries.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 16
Municipal Service Review Determinations - El Solyo Water District
The following are determinations related to the seven factors required by Section 56430 for a
Service Review for the El Solyo Water District:
1. Growth and Population Projections for the Affected Area
The District serves a rural area in the northwesterly portion of Stanislaus County. The area
is designated as agriculture on the County’s General Plan and does not expect any
significant population growth. The District currently serves 12 retail customers with irrigation
water for agricultural purposes.
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
Upon review of available Census data, there are no known disadvantaged unincorporated
communities within or contiguous to the District’s Sphere of Influence.
3. Present and Planned Capacity of Public Facilities and Adequacy of Public Services,
Including Infrastructure Needs or Deficiencies Related to Sewers, Municipal Water
and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
Water supplies are pumped from the San Joaquin River and delivered through District-
maintained canals and ditches. The District operates one pumping station located along the
San Joaquin River and five lift stations along the District’s main canal. The District has both
the ability and the capacity to serve its service area and has no unmet infrastructure needs
or deficiencies.
There are no known disadvantaged unincorporated communities within or contiguous to the
District’s Sphere of Influence. Additional services, such as sewer, domestic water, and
structural fire protection, are provided through other special districts or by way of private
systems.
4. Financial Ability of Agencies to Provide Services
At present time, the District appears to have the necessary financial resources to fund
adequate levels of service within its boundaries. The District maintains its rate schedule
with the intent to charge the minimum fees as possible.
5. Status of, and Opportunities for, Shared Facilities
At this time, the District does not share any facilities with other agencies or Districts. There
is no overlapping or duplication of services within the District boundaries.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 17
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
A five-member Board of Directors, elected by the landowners, governs the District. The
Board conforms to the provisions of the Brown Act requiring open meetings. The District is
subject to State Law AB-1234, requiring biennial ethics training, and the Political Reform
Act, requiring adoption, maintenance and biennial review of a Conflict-of-Interest Code for
board members. It is reasonable to conclude that the District can adequately serve the
territory under its jurisdiction. The District has a small, yet adequate staff to provide the
necessary services to its customers.
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
None.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 18
Sphere of Influence Determinations - El Solyo Water District
The following determinations for the El Solyo Water District’s Sphere of Influence update are
made in conformance with Government Code Section 56425 and local Commission policy:
1. Present and Planned Land Uses in the Area, Including Agricultural and Open-Space
Lands
The El Solyo Water District’s Sphere of Influence (SOI) includes approximately 4,060 acres.
Territory within the District boundaries consists of agricultural and rural residential land use
areas. These uses are not expected to change. In addition, the District does not have the
authority to make land use decisions, nor does it have authority over present or planned
land uses within its boundaries. The responsibility for land use decisions within the District
boundaries is retained by the County.
2. Present and Probable Need for Public Facilities and Services in the Area
The El Solyo Water District is presently meeting the needs of its agricultural water
customers. The future need of irrigation water to agricultural lands within the District is not
expected to diminish.
3. Present Capacity of Public Facilities and Adequacy of Public Services that the
Agency Provides or is Authorized to Provide
The District currently has the capacity to provide irrigation water services to customers
within its existing Sphere of Influence.
4. The Existence of Any Social or Economic Communities of Interest in the Area if the
Commission Determines That They are Relevant to the Agency
There are no communities of interest affecting the District’s ability to provide services to the
communities within the District boundaries.
5. For an Update of a Sphere of Influence of a City or Special District That Provides
Public Facilities or Services Related to Sewers, Municipal and Industrial Water, or
Structural Fire Protection, the Present and Probable Need for Those Public Facilities
and Services of Any Disadvantaged Unincorporated Communities Within the Existing
Sphere of Influence
As the District does not provide services related to sewers, municipal and industrial water or
structural fire protection, this factor is not applicable.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 19
EL SOLYO WATER DISTRICT
Boundary & Sphere of Influence
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 20
EL SOLYO WATER DISTRICT
DISTRICT SUMMARY PROFILE
Location: South of State Highway 132, east of McCracken Road, north of Gaffery
Road, and west of the San Joaquin River, near the unincorporated
community of Vernalis.
Service Area: Approximately 4,060 acres
Population*: 129
Land Use: Agriculture
Date of Formation: August 17, 1959
Enabling Act: California Water Code, Division 13, Section 34000 et. seq. (Water District
Act)
Governing Body: 5 Directors elected by the landowners within the District
Administration: 2 Full-time employees
District Services: Distribution of irrigation water
Total Revenue &
Expenditures**: Calendar Year 2019: Revenue - $866,476. Expenditures – $731,636.
(State Controller’s Office)
Primary Revenue
Source: Water fees and services
* LAFCO Staff Estimate
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 21
OAK FLAT WATER DISTRICT
Formation
The Oak Flat Water District was formed on October 13, 1964.
Governance
A five-member Board of Directors governs the District. Directors must be landowners within the
District and are elected by landowners. Meetings are held quarterly on the third Wednesday of
the month at 2:00 p.m., at the Del Puerto Water District office, located at 17840 Ward Avenue,
Patterson, and are open to the public.
Location and Size
The District encompasses approximately 4,537 acres (2,147 irrigable acres), and is located
south of the City of Patterson and west of the former Crows Landing Naval Air Station, in the
western portion of Stanislaus County.
Sphere of Influence
The District’s Sphere of Influence is coterminous with its current boundaries. No amendments
to the District’s boundaries or Sphere of Influence are being proposed with this Municipal
Service Review and Sphere of Influence Update.
Personnel
The District contracts with an independent contractor to perform the necessary management,
administrative and operational duties for the District.
Services
Under the terms of its water supply contract with the State Water Project, the District delivers up
to 5,700 acre-feet of irrigation water to its agricultural customers from the California Aqueduct.
The District is subject to reduced allocations based on drought conditions and pumping
restrictions. For example, in the 2020 season, the Department of Water Resources stated that it
would provide only a 20% contract supply allocation to the District from the State Water Project.
Support Agencies
The District maintains positive collaborative relationships with other agencies including the Del
Puerto Water District, the San Joaquin Valley Drainage Authority, the State Water Contractors
Association, and the California Department of Water Resources (DWR).
Funding Sources
The District receives assessments and water rate charges for providing agricultural irrigation
water to its customers.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 22
Municipal Service Review Determinations - Oak Flat Water District
The following are determinations related to the seven factors required by Section 56430 for a
Service Review for the Oak Flat Water District:
1. Growth and Population Projections for the Affected Area
The District serves an area that is unincorporated and agricultural on the westerly portion of
Stanislaus County. The area is designated as agriculture on the County’s General Plan and
the District does not expect any significant population growth during the five-year timeframe
of this current service review. The District currently serves seven retail customers with
irrigation water for agricultural purposes.
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
Upon review of available Census data, there are no known disadvantaged unincorporated
communities within or contiguous to the District’s Sphere of Influence.
3. Present and Planned Capacity of Public Facilities and Adequacy of Public Services,
Including Infrastructure Needs or Deficiencies Related to Sewers, Municipal Water
and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
At the present time, the District has both the ability and the capacity to serve its service area
and has no unmet infrastructure needs or deficiencies. As mentioned previously, there are
no disadvantaged unincorporated communities within or contiguous to the Sphere of
Influence of the District.
4. Financial Ability of Agencies to Provide Services
At present time, the District appears to have the necessary financial resources to fund
adequate levels of service within the District’s boundaries. There is no overlapping or
duplication of services within the District boundaries. The District sets its assessments and
water rates to recover its costs.
5. Status of, and Opportunities for, Shared Facilities
At this time, the District does not share any facilities with other Districts or agencies.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 23
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
A five-member Board of Directors, elected by the landowners, governs the District. The
Board is subject to the provisions of the Brown Act requiring open meetings. Additionally,
the District is subject to State Law AB-1234, requiring biennial ethics training, and the
Political Reform Act, requiring adoption, maintenance and biennial review of a Conflict-of-
Interest Code for board members. It is reasonable to conclude that the District can
adequately serve the areas under its jurisdiction. The District does not have a traditional
management structure as they do not employ full-time personnel. They do, however,
employ a Secretary/Manager on a contractual basis to perform the necessary administrative
and operational duties for the District.
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
In 2009, the State Water Resources Control Board approved consolidation of State Water
Project (SWP) and Central Valley Project (CVP) places of use. While this consolidation
could be seen as facilitating the transfer of available water supplies between the Del Puerto
District (a CVP contractor) and the Oak Flat Water District (a SWP contractor) other
constraints continue to limit the benefits that might accrue to the District from the increased
efficiency and flexibility in the source of water supplies and/or points of delivery.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 24
Sphere of Influence Determinations - Oak Flat Water District
The following determinations for the Oak Flat Water District’s Sphere of Influence update are
made in conformance with Government Code Section 56425 and local Commission policy:
1. Present and Planned Land Uses in the Area, Including Agricultural and Open-Space
Lands
The Oak Flat Water District’s Sphere of Influence (SOI) includes approximately 4,537 gross
acres; of that approximately 2,147 acres are irrigable lands. Territory within the District
boundaries consists of agricultural and rural land use areas. These uses are not expected
to change, excepting that Stanislaus County plans to develop its acreage within the District
to solar facility uses in late 2021. The District does not have the authority to make land use
decisions, nor does it have authority over present or planned land uses within its
boundaries. The responsibility for land use decisions within the District boundaries is
retained by the County.
2. Present and Probable Need for Public Facilities and Services in the Area
The need for irrigation water to agricultural lands within the District is not expected to
change.
3. Present Capacity of Public Facilities and Adequacy of Public Services that the
Agency Provides or is Authorized to Provide
The District currently has the necessary infrastructure and contract for the provision of
agricultural water service to areas within its existing Sphere of Influence.
4. The Existence of Any Social or Economic Communities of Interest in the Area if the
Commission Determines That They are Relevant to the Agency
The District serves a rural area comprised of large scale farming operations. There are no
communities of interest affecting the District’s ability to provide services to the communities
within the District boundaries.
5. For an Update of a Sphere of Influence of a City or Special District That Provides
Public Facilities or Services Related to Sewers, Municipal and Industrial Water, or
Structural Fire Protection, the Present and Probable Need for Those Public Facilities
and Services of Any Disadvantaged Unincorporated Communities Within the Existing
Sphere of Influence
No Disadvantaged Unincorporated Communities have been identified within or contiguous
to the District’s Sphere of Influence as defined in Section 56033.5 of the CKH Act. In
addition, the District does not provide services related to sewers, municipal and industrial
water or structural fire protection. Therefore, this factor is not applicable.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 25
OAK FLAT WATER DISTRICT
Boundary & Sphere of Influence
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 26
OAK FLAT WATER DISTRICT
DISTRICT SUMMARY PROFILE
Location: South of the City of Patterson and west of the former Crows Landing
Naval Air Station.
Service Area: Approximately 4,537 acres (2,147 acres are irrigable lands)
Population*: 26
Land Use: Agricultural
Date of Formation: October 13, 1964
Enabling Act: California Water Code, Division 13, Section 34000 et. seq. (Water District
Act)
Governing Body: 5 Directors, elected by landowners within District boundaries
Administration: There are no employees paid by the District
District Services: Contract and delivery of irrigation water
Total Operating
Budget: Year ending December 31, 2020: $715,062
Revenue Sources: Water fees and assessments
*Source: LAFCO Staff Estimate
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 27
PATTERSON IRRIGATION DISTRICT
Formation
On March 16, 1999, the Patterson Irrigation District (PID) was reorganized from the Patterson
Water District for the purposes of continuing to provide agricultural irrigation water to lands
within the District, and also to allow the District the ability to provide electrical power supplies
both within and outside its boundaries.
Governance
A five-member Board of Directors, elected by the registered voters within the District
boundaries, governs the District. Meetings are held on the third Wednesday of each month at
1:00 p.m., at the District office, located at 948 Orange Avenue, Patterson. The Board also
conforms to the provisions of the Brown Act requiring open meetings.
Location and Size
The District serves approximately 12,957 acres and is generally located east of the City of
Patterson and Highway 33, south of Del Puerto Creek and west of the San Joaquin River, in the
western portion of Stanislaus County. The District supplies agricultural irrigation water to users
growing over 30 different crops. Crops include alfalfa, corn, almonds, walnuts, tomatoes,
apricots and beans.
Sphere of Influence
The District’s Sphere of Influence is coterminous with its current boundaries, with the exception
of approximately 110 acres adjacent to the northwest portion of the District. Portions of the
District’s Sphere of Influence are located within the City of Patterson’s Sphere of Influence.
Personnel
The District employs 13 employees (12 full-time and 1 part-time).
Services
The District currently provides agricultural irrigation water to its customers. The District is able
to provide irrigation water supplies to its customers via several sources including the following:
Imported water from the Delta Mendota Canal (Central Valley Project)
Reclaimed agricultural surface drainage
Groundwater from deep wells within the District boundaries
Surface water from the San Joaquin River (Pre-1914 Water Rights Permit)
The District currently serves a few areas that were annexed by the City of Patterson, namely the
Villages of Patterson area, and the Southeast Industrial Reorganization area near the corner of
First Street and Orange Avenue. The District also provides water to fringe areas within Del
Puerto Water District near Elfers Avenue and Ward Avenue. These out-of-district deliveries are
provided under annual contract with landowners. The availability of water to serve out of district
areas is made by the Board of Directors on an annual basis after a review of local and statewide
hydrologic conditions.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 28
Programs
The Patterson Irrigation District operates the following programs:
The District has embarked on a canal improvement project (on Lateral 3-south). The
purpose of this project is to: increase canal capacity and operational safety; incorporate the
reservoir project into the canal system for both water supply outputs from the canal to the
reservoir.
The District completed construction of the Fish Screen and Pumping Plant Project in 2011, a
partnership between PID, the California Department of Fish and Wildlife, and the US Bureau
of Reclamation. The Project replaced the District’s San Joaquin River Pumping Plant, which
was an un-screened diversion. The completed Project protects fish species in the San
Joaquin River, including fall-run Chinook Salmon and Steelhead, while also preserving the
District’s pre-1914 water rights and right to operate the pumping plant.
In addition, the District offers programs to assist water users with water and energy
conservation and management including pump testing, irrigation system evaluations,
irrigation scheduling and cost sharing on water conserving pipeline projects.
The District has recently completed its “Two Drains Project”, which captures water from the
Spanish and Marshall drains and stores it in the Southside Reservoir for future use. The
system will allow PID to capture up to 5,000 acre feet of drain water per year that would
normally flow into the river.
Support Agencies
The District maintains positive and collaborative relationships with other agencies, such as the:
Central California Irrigation District (CCID), Del Puerto Water District, West Stanislaus Irrigation
District (WSID), Turlock Irrigation District (TID), Twin Oaks Irrigation Water Company, Regional
Water Quality Control Board (RWQCB), Association of California Water Agencies (ACWA), and
the US Bureau of Reclamation.
The District is a member of several Joint Powers Authorities including:
a. San Luis and Delta Mendota Water Authority: A JPA formed by South-of-Delta Central
Valley Project contractors for the purpose of operating and maintaining the Federal Delta
Mendota Canal, as well as following state and federal water issues that affect CVP
contract supply.
b. San Joaquin Valley Drainage Authority: A JPA formed for grower monitoring and
compliance for the Irrigated Lands Regulatory Program of the Regional Water Quality
Control Board. The Drainage Authority serves as the Third-Party Coalition administrator
for the Western San Joaquin River Watershed Coalition. Growers enrolled as Coalition
members receive regulatory compliance for this statewide program.
c. Delta Mendota Canal Contractors Authority: A small group of South-of-Delta Central
Valley Project contractors formed for the purpose of monitoring regional drainage issues
and activities originally planned by Reclamation for the western San Joaquin River. This
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 29
group meets annually to review purpose and financials, but is not regularly active due to
lack of activity on that effort.
d. Association of California Water Agencies Joint Powers Insurance Authority (JPIA): JPIA
is a pooled insurance program of water agencies that administers health, property, and
liability insurance.
e. Westside Power Authority: A JPA formed between Turlock Irrigation District and
Patterson Irrigation District with the original purpose of expanding electrical service to
the Patterson area. The Westside Power Authority meets occasionally to discuss local
power issues that affect the agencies.
Funding Sources
PID currently has two methods from which it generates revenue. The District has a fixed, land-
based assessment at $60 per acre. As of 2020, an allocation of one acre-foot per acre is
typically provided with this assessment. Water deliveries beyond the allocation can continue
and be unrestricted as long as supplies are available to the District and at a rate of $30 per acre
-foot.
For Priority Area 1 there is a $60 per acre contract fee, with a water rate of $55 per acre-foot.
Water delivers are unrestricted if supplies to the in-district lands are not restricted. If in-district
deliveries are restricted for any reason, out-of-district deliveries will cease.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 30
Municipal Service Review Determinations - Patterson Irrigation District
The following are determinations related to the seven factors required by Section 56430 for a
Service Review for the Patterson Irrigation District:
1. Growth and Population Projections for the Affected Area
The District serves an unincorporated area near the City of Patterson that is primarily
agricultural. Portions of the District’s boundaries currently overlap with the City of
Patterson’s Sphere of Influence. As development occurs or with annexation to the City, the
territory is detached from the District. The District currently serves 757 retail customers with
irrigation water for agricultural purposes.
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
Upon review of available Census data, there are no known disadvantaged unincorporated
communities within or contiguous to the District’s Sphere of Influence.
3. Present and Planned Capacity of Public Facilities and Adequacy of Public Services,
Including Infrastructure Needs or Deficiencies Related to Sewers, Municipal Water
and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
At the present time, the District has both the ability and the capacity to serve its service area
and has no unmet infrastructure needs or deficiencies.
PID Staff has indicated that some of the District’s infrastructure needs include the following:
a) Failing existing cast-in-place pipelines.
b) Existing laterals failing from squirrels and on-going operations and maintenance.
c) Pipelines failing due to changing irrigation methods taxing lines designed to be gravity
operated.
The District has been working on a capital improvement program for its main canal facilities
which were built 40+ years ago. This is primarily a replacement effort and not due to service
deficiencies. Otherwise, the District will continue to maintain and improve facilities as
needed.
The District has a number of upcoming projects in order to maintain and improve its existing
infrastructure. The District has the following upcoming projects:
a) East West Conveyance Project - $45 million project consisting of replacing pumping
plants 4 and 5 with a new pump station, replacement of lifts and a new 160 cfs pump
station to the Delta-Mendota Canal.
b) Replacement of the 2N canal from Magnolia to Loquat Avenues.
c) Relocation of the Marshall Road Pump station into the Marshall Road Reservoir.
d) Replacement of 3N and 4N canals from Magnolia to Loquat Avenues.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 31
4. Financial Ability of Agencies to Provide Services
At present time, the District appears to be in sound financial shape and has the necessary
financial resources to fund sufficient levels of service. A base budget is submitted to the
Board of Directors for review and approval. The District’s budgeting process is designed to
screen out unnecessary costs by placing resources where they are most needed. There is
no overlapping or duplication of services within the District boundaries. The District, on an
annual basis, reviews its rate and fee schedule and attempts to keep the rates and fees as
minimum as possible, while maintaining a high level of customer service and water supply
reliability.
5. Status of, and Opportunities for, Shared Facilities
When necessary, the District shares facilities, especially in times of emergency situations.
The District also assists its customers with a cost-sharing program for water conservation
projects. In addition, the District is part of several Joint Powers Authorities providing a
variety of services within its district and to its partners.
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
A five-member Board of Directors, elected by the registered voters within the District
boundaries, govern the District. The Board is subject to the provisions of the Brown Act
requiring open meetings. Additionally, The District is subject to State Law AB-1234,
requiring biennial ethics training, and the Political Reform Act, requiring adoption,
maintenance and biennial review of a Conflict-of-Interest Code for board members. It is
reasonable to conclude that the District can adequately serve the areas under its
jurisdiction. The District has the necessary resources and staffing levels to operate in a
cost-efficient and professional manner.
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
The District operates a variety of programs including a water conservation project, a canal
improvement project, and the fish screening and pumping project.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 32
Sphere of Influence Determinations - Patterson Irrigation District
The following determinations for the Patterson Irrigation District’s Sphere of Influence update
are made in conformance with Government Code Section 56425 and local Commission policy:
1. Present and Planned Land Uses in the Area, Including Agricultural and Open-Space
Lands
The Patterson Irrigation District’s Sphere of Influence (SOI) includes approximately 13,067
acres. Territory within the District boundaries and SOI consists of agricultural and rural
residential land use areas. These uses are not expected to change, with the exception of
those areas in the Sphere of Influence of the City of Patterson. In addition, the District does
not have the authority to make land use decisions, nor does it have authority over present or
planned land uses within its boundaries. The responsibility for land use decisions within the
District boundaries is retained by the County and the City of Patterson.
2. Present and Probable Need for Public Facilities and Services in the Area
The probable need for the District’s ability to continue to provide public facilities and services
in the area is affected by the fact that the City of Patterson’s Sphere of Influence overlaps
into the District. The District has a diminishing sphere, in that as territory annexes to the
City of Patterson, it detaches from the District.
3. Present Capacity of Public Facilities and Adequacy of Public Services that the
Agency Provides or is Authorized to Provide
The District currently has adequate capacity to provide irrigation water to areas within its
existing Sphere of Influence in an efficient manner. The District continues to maintain its
existing infrastructure through repair, replacement and/or relocation of its facilities.
4. The Existence of Any Social or Economic Communities of Interest in the Area if the
Commission Determines That They are Relevant to the Agency
The City of Patterson is considered a community of interest as the City’s Sphere of Influence
overlaps into the District’s boundaries. As territory is annexed into the City, it detaches from
the District.
5. For an Update of a Sphere of Influence of a City or Special District That Provides
Public Facilities or Services Related to Sewers, Municipal and Industrial Water, or
Structural Fire Protection, the Present and Probable Need for Those Public Facilities
and Services of Any Disadvantaged Unincorporated Communities Within the Existing
Sphere of Influence
As the District does not provide services related to sewers, municipal and industrial water or
structural fire protection, this factor is not applicable.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 33
PATTERSON IRRIGATION DISTRICT
Boundary & Sphere of Influence
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 34
PATTERSON IRRIGATION DISTRICT
DISTRICT SUMMARY PROFILE
Location: East of the City of Patterson and Highway 33, south of Del Puerto Creek
and west of the San Joaquin River.
Service Area: Approximately 12,957 acres
Population*: 2,107
Land Use: Agricultural
Date of Formation: March 16, 1999 (Reorganization of the Patterson Water District)
Enabling Act: California Water Code, Division 11, Section 20500 et. seq. (Irrigation
District Law)
Governing Body: 5 Directors, elected by registered voters within the District boundaries
Administration: 13 employees (12 full time and 1 part time)
District Services: Distribution of irrigation water
Total Operating
Budget: Year ending December 31, 2019: $5,848,111
Revenue Sources: Water fees and assessments
*Source: LAFCO Staff Estimate
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 35
WEST STANISLAUS IRRIGATION DISTRICT
Formation
The West Stanislaus Irrigation District was formed on November 29, 1920.
Governance
A five-member Board of Directors, elected by the registered voters within the District
boundaries, governs the District. Meetings are held on the Tuesday of the second full week of
each month at 9:30 a.m. at the Westley Fire House, 8598 Kern Street, in Westley. The Board is
also subject to the provisions of the Brown Act requiring open meetings.
Location and Size
The District is located west of the San Joaquin River, northwest of the City of Patterson, and
includes the unincorporated communities of Westley, Grayson and Vernalis. The District’s
boundaries encompass approximately 21,774 acres and contains approximately 20,270 acres in
agricultural production. The District currently serve 94 water user accounts.
Sphere of Influence
The District’s Sphere of Influence is coterminous with its current boundaries.
Personnel
There are 16 persons (15 full-time and 1 part-time) employed by WSID.
Services
The District provides irrigation water for agricultural purposes to its customers. The District is
able to provide irrigation water supplies to its customers via several sources including the
following:
Surface water from the Tuolumne and San Joaquin Rivers
Groundwater from four deep wells within the District boundaries
Importing water from the Delta Mendota Canal, as part of the Central Valley Project
The District, under a water rights agreement, also sells irrigation water to 13 landowners, which
includes approximately 2,207 irrigable acres outside its Sphere of Influence in the White Lake
area (north of the unincorporated community of Grayson). This agreement was part of an
original pumping rights contract from the 1920’s.
In addition, since 1936, the District has operated an official weather station for the U.S.
Department of Agriculture Weather Bureau.
Programs
The West Stanislaus Irrigation District has embarked on the following programs:
Main Canal Modernization - Beginning in 2010, WSID performed a Main Canal
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 36
Modernization Feasibility Study where pumping plants were evaluated for structural
integrity, pumping plan performance and long-term reliability. Through this study, it was
determined that the system has significant water supply reliability issues. As a result,
four different alternatives were evaluated to modernize the main canal pump facilities to
assure long-term water supply reliability to growers. One alternative was chosen to
implement in three phases. Phase I consisted of Pump Station 1A facilities construction.
This phase consists of a new 350 cubic feet per second (cfs) pumping plant, roughly
4,400 feet of 96-inch diameter reinforced concrete pipe, and associated pumps, motors,
switchgear, turnouts, meters, and controls. This phase was completed in 2013.
Construction of Pump Station 5A facilities began in 2013 and was complete and
operational in 2014 which allow water to be pumped from Reach 4 at a rate of 250 cfs
and discharge into Reach 5 & 6 through a 96-inch reinforced concrete pipeline.
The third phase will be the construction of Pump Station 3A and associated conveyance
pipeline to replace Pump Stations 3 and 4 and Canal Reaches 3 and 4.
Following the modernization of the Main Canal, the District will move to the
modernization of the lateral delivery system to increase the level of service, better
regulate the water supply, reduce system losses, and improve water measurement
systems to accomplish accurate water management and accounting.
Fish Screen Project - The District is pursuing a fish screen project to screen its diversion
off the San Joaquin River to protect entrapment of anadromous fish. Two Fish Screen
Feasibility Studies have previously been performed that the District cost-shared with the
US Bureau of Reclamation. The District has completed the design phase of the project,
which was financed through a grant with the CA Department of Fish and Wildlife.
Construction is currently on hold due to funding purposes.
Support Agencies
The District maintains a positive collaborative relationship with other agencies, authorities and
associations, including neighboring water and irrigation districts (El Solyo Water District,
Patterson Irrigation District, and Del Puerto Water District), as well as the San Luis & Delta-
Mendota Water Authority, Power and Water Resource Pooling Authority, the San Joaquin Valley
Drainage Authority, the Association of California Water Agencies, Delta-Mendota Canal
Contractors Authority, U.S. Bureau of Reclamation, and the CA Department of Fish and Wildlife.
The District is a member of several Joint Powers Authorities including:
a. San Luis and Delta Mendota Water Authority: A JPA formed by South-of-Delta Central
Valley Project contractors for the purpose of operating and maintaining the Federal Delta
Mendota Canal, as well as following state and federal water issues that affect CVP
contract supply.
b. San Joaquin Valley Drainage Authority: A JPA formed for grower monitoring and
compliance for the Irrigated Lands Regulatory Program of the Regional Water Quality
Control Board. The Drainage Authority serves as the Third-Party Coalition administrator
for the Western San Joaquin River Watershed Coalition. Growers enrolled as Coalition
members receive regulatory compliance for this statewide program.
c. Delta Mendota Canal Contractors Authority: A small group of South-of-Delta Central
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 37
Valley Project contractors formed for the purpose of monitoring regional drainage issues
and activities originally planned by Reclamation for the western San Joaquin River. This
group meets annually to review purpose and financials, but is not regularly active due to
lack of activity on that effort.
d. Power and Water Resources Pooling Authority: A Joint Powers Authority comprised of 9
Irrigation Districts that organized in 2004 under California State law to collectively
manage individual power assets and loads.
Funding Sources
WSID receives the majority (95%) of its funding from water sales and assessments. In addition,
the District also receives a small portion of its revenue from property tax collected from
Stanislaus and San Joaquin counties.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 38
Municipal Service Review Determinations - West Stanislaus Irrigation District
The following are determinations related to the seven factors required by Section 56430 for a
Service Review for the West Stanislaus Irrigation District:
1. Growth and Population Projections for the Affected Area
The District serves an area that is unincorporated and agricultural, located west of the San
Joaquin River, northwest of the City of Patterson, and includes the unincorporated
communities of Westley, Grayson and Vernalis. A small portion of the district extends into
San Joaquin County. Significant population growth is not expected. The District currently
serves 83 retail customers within its boundaries, and 13 customers outside its boundaries in
the White Lake area, with irrigation water for agricultural purposes.
2. The Location and Characteristics of Any Disadvantaged Unincorporated Communities
Within or Contiguous to the Sphere of Influence
The District’s boundary includes two communities meeting the income criteria to be
considered disadvantaged unincorporated communities. The community of Westley and a
portion of the community of Grayson are within the District’s boundaries and are contiguous
to the District’s Sphere of Influence.
3. Present and Planned Capacity of Public Facilities and Adequacy of Public Services,
Including Infrastructure Needs or Deficiencies Related to Sewers, Municipal Water
and Industrial Water, and Structural Fire Protection in Any Disadvantaged,
Unincorporated Communities Within or Contiguous to the Sphere of Influence
The District currently has both the ability and the capacity to serve its service area and has
no unmet infrastructure needs or deficiencies. It is reasonable to conclude that the District
can adequately serve the areas under its jurisdiction.
Recently, the District constructed an operations and maintenance facility and administrative
office adjacent to the District’s main canal system and first pumping station.
4. Financial Ability of Agencies to Provide Services
At present time, the District appears to be in sound financial condition and has the
necessary financial resources to fund sufficient levels of service to its customers. There is
no overlapping or duplication of services within the District boundaries. The District
prepares an annual budget, which includes a review of the rates and fees assessed for the
delivery of irrigation water to its customers. The budget is submitted to the District Board
for review and approval.
5. Status of, and Opportunities for, Shared Facilities
The District shares facilities with other agencies as necessary and continually reviews new
opportunities to continue these efforts. For example, the District has offered conference
room space to the neighboring West Stanislaus Fire Protection District. In addition, the
District has shared its facilities and equipment with other agencies on an as-needed basis
(e.g., flood emergencies).
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 39
6. Accountability for Community Service Needs, Including Governmental Structure and
Operational Efficiencies
A five-member Board of Directors, elected by the registered voters within the District,
governs the District. The Board conforms to the provisions of the Brown Act requiring open
meetings. Additionally, the District is subject to State Law AB-1234, requiring biennial ethics
training, and the Political Reform Act, requiring adoption, maintenance and biennial review
of a Conflict-of-Interest Code for board members. The District has the necessary resources
and staffing levels to operate in a cost-efficient and professional manner.
7. Any Other Matter Related to Effective or Efficient Service Delivery, as Required by
Commission Policy
None.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 40
Sphere of Influence Determinations - West Stanislaus Irrigation District
The following determinations for the West Stanislaus Irrigation District’s Sphere of Influence
update are made in conformance with Government Code Section 56425 and local Commission
policy:
1. Present and Planned Land Uses in the Area, Including Agricultural and Open-Space
Lands
The West Stanislaus Irrigation District’s Sphere of Influence (SOI) includes approximately
21,774 acres. Territory within and outside the District boundaries consists of agricultural
and rural residential land use areas. These uses are not expected to change. In addition,
the District does not have the authority to make land use decisions, nor does it have
authority over present or planned land uses within its boundaries. The responsibility for land
use decisions within the District boundaries is retained by Stanislaus and San Joaquin
Counties.
2. Present and Probable Need for Public Facilities and Services in the Area
The District is presently meeting the needs of its agricultural water customers. The future
need of irrigation water to agricultural lands within the District is not expected to change.
3. Present Capacity of Public Facilities and Adequacy of Public Services that the
Agency Provides or is Authorized to Provide
The District currently has adequate capacity to provide irrigation water to areas within its
existing Sphere of Influence in an efficient manner.
4. The Existence of Any Social or Economic Communities of Interest in the Area if the
Commission Determines That They are Relevant to the Agency
The City of Patterson is considered a community of interest as the City’s current boundary
and Sphere of Influence are adjacent to the District’s boundaries. Should the City propose
to expand its Sphere, it would overlap into the District’s boundary. In addition, the District
serves the White Lake area, located outside of its boundaries, as a result of an original
pumping rights agreement dating back to the 1920s.
5. For an Update of a Sphere of Influence of a City or Special District That Provides
Public Facilities or Services Related to Sewers, Municipal and Industrial Water, or
Structural Fire Protection, the Present and Probable Need for Those Public Facilities
and Services of Any Disadvantaged Unincorporated Communities Within the Existing
Sphere of Influence
As the District does not provide services related to sewers, municipal and industrial water or
structural fire protection, this factor is not applicable.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 41
WEST STANISLAUS IRRIGATION DISTRICT
Boundary & Sphere of Influence
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 42
WEST STANISLAUS IRRIGATION DISTRICT
DISTRICT SUMMARY PROFILE
Location: Northwest of the City of Patterson, including the unincorporated
communities of Westley, Grayson, and Vernalis.
Service Area: Approximately 21,774 acres
Population*: 1,678
Land Use: Agriculture
Date of Formation: May 20, 1920
Enabling Act: California Water Code, Division 11, Section 20500 et. seq. (Irrigation
District Act)
Governing Body: 5 Directors – elected by registered voters within the District boundaries
Administration: 16 employees (15 full-time and 1 part-time)
District Services: Distribution of water for irrigation purposes
Total Operating
Expenditures: Year ending December 31, 2019: $9,940,101
Revenue Sources: Water fees/assessments and property taxes
*LAFCO Staff estimate
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 43
REFERENCES
REFERENCES
1. California Department of Water Resources. Disadvantaged Communities (DAC)
Mapping Tool. Website (https://gis.water.ca.gov/app/dacs/). Accessed January 19,
2021.
2. California State Controller’s Office. Special Districts Financial Data. Website
(https://districts.bythenumbers.sco.ca.gov) Accessed January 19, 2021
3. Del Puerto Water District. Audited Financial Statements. February 29, 2020.
4. Northern and Central Delta-Mendota Regions Groundwater Sustainability Plan.
November 2019
5. Patterson Irrigation District. Financial Statements and Independent Auditor’s Report
for the Years Ended December 31, 2019 and 2018
6. Patterson Irrigation District. Water Management Plan/Agricultural Water
Management Plan 2008 Criteria, Revised June 15, 2016.
7. Patterson Irrigation District. Water Rate Study, November 28, 2018.
8. Stanislaus LAFCO. Municipal Service Review and Sphere of Influence Update for
the Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts, and the Patterson and
West Stanislaus Irrigation Districts. July 27, 2016.
9. State of California Legislative Analyst’s Office. Water Special Districts: A Look at
Governance and Public Participation. March 2002.
10. West Stanislaus Irrigation District. Financial Statements and Independent Auditor’s
Report for the Years Ended December 31, 2019.
MSR & SOI Update – Del Puerto, Eastin, El Solyo, and Oak Flat Water Districts; Patterson
and West Stanislaus Irrigation Districts Page 44