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MUNICIPAL SERVICE REVIEW AND
SPHERE OF INFLUENCE UPDATE FOR THE:
SOI
STANISLAUS
COUNTY
MODESTO IRRIGATION DISTRICT
Prepared By:
Stanislaus Local Agency Formation Commission
1010 Tenth Street, Third Floor
Modesto, CA 95354
Phone: (209) 525-7660
Adopted: September 28, 2022
STANISLAUS
LOCAL AGENCY FORMATION COMMISSION
COMMISSIONERS
Vito Chiesa, County Member
Terry Withrow, County Member (Chair)
Mani Grewal, Alternate County Member
Amy Bublak, City Member
Richard O’Brien, City Member (Vice Chair)
Javier Lopez, Alternate City Member
Ken Lane, Public Member
Bill Berryhill, Alternate Public Member
STAFF
Sara Lytle-Pinhey, Executive Officer
Javier Camarena, Assistant Executive Officer
Rob Taro, Commission Counsel
Jennifer Vieira, Commission Clerk
TABLE OF CONTENTS
Introduction ..........................................................................................................1
Service Review Factors and Sphere of Influence Update Process .................................. 1
Sphere of Influence Update Process ............................................................................... 2
Service Review – Modesto Irrigation District ....................................................3
Authority ..........................................................................................................................3
Background .....................................................................................................................3
Purpose ...........................................................................................................................3
Governance .....................................................................................................................3
Formation ........................................................................................................................4
Location and Size ............................................................................................................4
Sphere of Influence .........................................................................................................4
Personnel ........................................................................................................................4
Classification of Services ................................................................................................. 4
Mission Statement ...........................................................................................................6
Partnership Agencies ......................................................................................................6
Funding Sources .............................................................................................................6
Service Review Determinations .........................................................................................7
Growth and Population Projections .................................................................................. 7
Location and Characteristics of Disadvantaged, Unincorporated Communities ............... 7
Present and Planned Capacity of Public Facilities, Adequacy of Public Services ............ 7
Financial Ability of Agencies to Provide Services ............................................................. 8
Status of, and Opportunities for, Shared Facilities ........................................................... 9
Accountability for Community Service Needs .................................................................. 9
Any Other Matter Related to Effective or Efficient Service Delivery ............................... 10
Sphere of Influence Update – Modesto Irrigation District ............................. 11
Sphere Determinations ..................................................................................................... 11
Present and Planned Land Uses ................................................................................... 11
Present and Probable Need for Public Facilities and Services ....................................... 12
Present Capacity of Public Facilities and Adequacy of Public Services ......................... 12
Communities of Interest in the Area ............................................................................... 12
Need for Facilities and Services in Disadvantaged Unincorporated Communities ......... 12
Modesto Irrigation District Summary Profile ......................................................................... 13
Map 1: Modesto Irrigation District Boundary & SOI ............................................................ 14
Map 2: Modesto Irrigation District Electrical Service Area ................................................. 15
References .............................................................................................................................. 16
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Municipal Service Review and Sphere of Influence Update
For the Modesto Irrigation District
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).
The legislative authority for conducting Service Reviews is provided in Government Code
§56430 of the CKH Act. The Act states, that “in order to prepare and to update spheres of
influence in accordance with §56425, the commission shall conduct a service review of the
municipal services provided in the county or other appropriate area...” A Service Review must
have written determinations that address the following factors:
Service Review Factors to be Addressed
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
This Service Review will analyze the Modesto Irrigation District. The most recent Sphere of
Influence (SOI) update for the Modesto Irrigation District was adopted in 2017 and proposed no
changes to the District’s SOI. The current update serves to comply with Government Code
Section 56425 and will reaffirm the SOI for the District.
MSR & SOI Update – Modesto Irrigation District 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 the
Service Review 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 Service Review will be used to determine what type of services each district is
expected to provide and the extent to which they are actually able to do so. The Sphere of
Influence will delineate the service capability and expansion capacity of the agency, if
applicable.
MSR & SOI Update – Modesto Irrigation District Page 2
Service Review – Modesto Irrigation District
Authority
The Modesto Irrigation District was organized under the provisions of the California Irrigation
District Law (Division 11 of the Water Code, §20500 et. seq). In addition, the District is a
“registered voter district”, as registered voters elect the board of directors from five geographical
divisions within the District’s boundaries.
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 water districts with a great diversity of purposes,
governance structures, and financing mechanisms. Some districts are responsible for one type
of specific duty, while other districts provide multiple public services, as is the case for the
Modesto Irrigation District.
Purpose
The specific powers that an irrigation district may exercise include: supply water for beneficial
purposes; provide for any and all drainage made necessary by the irrigation provided for by the
district; purchase or lease electric power and provide for the acquisition, operation, and control
of plants for the generation, transmission, and provision of electric power; provide, maintain and
operate flood control works in districts having 200,000 acres or more; reclaim waste for
beneficial use; sewage disposal if provided by majority at election; construct, maintain, and
operate recreational facilities in connection with dams, reservoirs, or other work owned and
constructed by the district.
Water Code §22120 allows a district to sell, dispose of, and distribute electric power for use
outside its boundaries. However, MID’s authority to sell power outside its political boundaries is
outlined by Public Utilities Code §9610. That section allows MID to provide electric service
within an area of approximately 400 square miles to the north of its political boundaries, as well
as to the Mountain House Community Services District, and up to 8 megawatts of power to the
Contra Costa Water District.
Governance
A five-member Board of Directors governs the District. Registered voters within a geographical
area or “Division”, elect the board members. Regularly scheduled Board meetings are held at
9:00 a.m. on the second Tuesday of each month at the MID main office located at 1231 11th
Street, Modesto. Additional meetings are generally scheduled on other Tuesdays, and may be
scheduled at other times, as necessary.
The District has established a website (www.mid.org), which is user-friendly and provides
information such as: district news, services, education, board agendas, rates and fees, and
annual reports.
MSR & SOI Update – Modesto Irrigation District Page 3
Formation
The Modesto Irrigation District (MID) was formed on July 18, 1887.
Location and Size
The majority of the District is located in northern Stanislaus County. The District’s water service
area boundaries comprise of approximately 101,700 acres. The District provides irrigation water
to approximately 3,100 agricultural customers who irrigate close to 60,000 acres of permanent
and annual crops alike. The District maintains over 200 miles of canals and pipelines, which
are operated on a gravity flow system. The canals were completed in 1903 and the first official
MID irrigation season opened in 1904. The District also owns and operates irrigation
groundwater wells and drainage wells.
Sphere of Influence
The District’s Sphere of Influence (SOI) is slightly larger than its District boundaries, and reflects
expansion areas for irrigation service (see “Map 1”, attached). The city limits of Modesto (north
of the Tuolumne River), Riverbank (south of the MID Main Canal), Waterford, and the
unincorporated communities of Empire and Salida are located within the District’s Sphere of
Influence boundary.
When the Sphere of Influence was first adopted by LAFCO for the Modesto Irrigation District in
1984, two separate spheres were considered--one for irrigation and one for electricity.
However, since the District does not need LAFCO approval for changes to its electrical service
area, only a sphere for irrigation services was adopted.
The Modesto Irrigation District’s electric service area is depicted on “Map 2”, attached. The
laws governing an irrigation district allow a district to provide electric power outside its
boundaries. Therefore, it is recommended that the current SOI be affirmed.
Personnel
The District currently has 458 employees.
Classification of Services
The District is authorized to provide the functions or classes of services (e.g. electricity,
irrigation and domestic water) as identified in this report. Due to recent changes in the Cortese-
Knox-Hertzberg Act, the District would have to seek LAFCO approval to exercise other latent
powers (i.e. services) not currently provided.
The District currently distributes water for irrigation purposes, delivers treated drinking water to
the City of Modesto on a wholesale basis, and generates and distributes retail electrical power.
Storm water and agricultural drainage services are also provided.
• Water Resources and Delivery
The District’s source of water is the Tuolumne River, which begins with melting snow on the
slopes of 13,090-foot Mt. Lyell in Yosemite National Park. Before it joins the San Joaquin
River on the valley floor, the Tuolumne River water is stored in reservoirs. The stored water
is used to produce electricity and is used for irrigation and drinking water for MID, Turlock
MSR & SOI Update – Modesto Irrigation District Page 4
Irrigation District (TID) and the City/County of San Francisco. The 158-mile Tuolumne River
also provides recreational opportunities. In addition to the Tuolumne River, the District also
utilizes groundwater.
The following water facilities are utilized by the District: Don Pedro Reservoir, which
provides water storage as well as other benefits such as flood control, hydropower, and
recreation; the La Grange Dam, which diverts water for MID and TID; and the Modesto
Reservoir, which regulates canal flows and stores water.
Irrigation Water
The District has provided irrigation water for agriculture since 1904, and currently delivers
irrigation water to approximately 3,100 customers farming approximately 60,000 acres.
Irrigated crops include almonds, pasture lands, walnuts, hay, peaches, corn, alfalfa, wine
grapes, oats, and vegetable crops.
Domestic Water
The District provides wholesale domestic water service to only one customer – the City of
Modesto. MID also served the Del Este Water Company when the District began wholesale
domestic water service in 1994. The Del Este water distribution system was subsequently
acquired by the City of Modesto.
MID’s wholesale domestic water facilities include the Modesto Regional Water Treatment
Plant located at Modesto Reservoir, east of the City of Waterford. The plant completed an
expansion in 2016 and is now capable to provide up to 60 million gallons per day. A treated
water transmission pipeline extends from this plant to a terminal reservoir and pump station
located in east Modesto. Several smaller transmission pipelines connect the terminal
reservoir and pump station to the City of Modesto’s water distribution system.
The District also provides retail domestic water service to approximately 68 customer
connections in the unincorporated community of La Grange. The La Grange water system
is co-owned by MID and the Turlock Irrigation District (TID) under a contract dating back to
1921. TID operates and maintains the La Grange domestic water system.
• Electric Delivery and Transmission Services
In 1923, the District, together with TID, completed construction of the original Don Pedro
Dam and electrical powerhouse. Ownership of the Don Pedro project was based on the
land area of the two districts. As a result, both districts operate the dam and share in its
irrigation water and power output according to a ratio of 31.54 percent for MID and 68.46
percent for TID. Currently, the Modesto Irrigation District supplies electricity to
approximately 131,000 retail customers.
Electrical Power Facilities
In 1971, a new larger Don Pedro Dam was completed, which inundated the original dam
and enlarged the reservoir’s capacity seven times. The new powerhouse increased
hydroelectric generation by nearly the same amount. Lake Don Pedro and the Modesto
Reservoir, which are also part of the District’s irrigation system, serve as popular recreation
MSR & SOI Update – Modesto Irrigation District Page 5
areas for boaters, campers, anglers and water skiers. The District’s share of Don Pedro’s
199 MW generating capacity is approximately 63 MW.
Other electrical generating facilities that are owned and operated by the District include: the
181 MW natural gas-fired Woodland Generation Station, the 96 MW natural gas-fired Ripon
Generation Station, and the 122 MW dual-fuel (diesel/natural gas) McClure Generation
Station.
Electric Utility Public Benefit Programs
In accordance with state law, the District devotes a percentage of its electric revenue to
public benefit programs, such as energy efficiency and conservation; low-income
assistance; renewable energy resources and technology; and research and development or
demonstration projects.
• Other MID Programs
Through the “MPowered” program, MID offers rebates, energy audits, customer education
and information to its electrical customers. The “Shave the Energy Peak” or STEP program
is a demand-side management program which allows MID operators to reduce electricity
demand by cycling air conditioners during peak use periods. (Approximately 10,000
customers are currently enrolled in the STEP program.)
MID also sponsors safety education programs, including the use of a mascot named
“Splasher” to promote canal safety and “BeAware Bear” for electrical safety.
Mission Statement
“MID will provide electric, irrigation and domestic water services for its customers, delivering the
highest value at the lowest cost possible through teamwork, technology, innovation and
commitment.”
Partnership Agencies
The District maintains positive and collaborative relationships with other agencies, such as: the
cities of Modesto, Oakdale, Riverbank, Waterford, Ripon, Escalon, Stanislaus County, Turlock
Irrigation District (TID), Merced Irrigation District, Oakdale Irrigation District (OID), South San
Joaquin Irrigation District (SSJID), San Joaquin Tributaries Authority (SJTA), the City/County of
San Francisco (CCSF), Pacific Gas & Electric Company (PG&E), Sacramento Municipal Utility
District (SMUD), Calaveras County Water District, Mountain House Community Services
District, Don Pedro Recreation Agency, Balancing Authority of Northern California (BANC), the
Transmission Agency of Northern California (TANC), the M-S-R Public Power Agency, the
Northern California Power Agency (NCPA), and other local, state, and federal agencies.
Funding Sources
The District’s source of revenue is derived from the following sources: power sales (residential,
commercial, and industrial), wholesale power, domestic water, irrigation water, interest
earnings, and other income (including improvement district fees and customer fees). The
MSR & SOI Update – Modesto Irrigation District Page 6
District does not collect special assessments, nor does it receive a share of the county property
tax revenues.
Service Review Determinations:
The following provides an analysis of the seven categories or components required by §56430
for a Service Review for the Modesto Irrigation District:
1. Growth and population projections for the affected area
The District currently serves about 3,100 customers with irrigation water for agricultural
purposes, one wholesale domestic water customer (City of Modesto), and 68 retail
customers in La Grange that are jointly served by MID and TID with domestic water for
residential purposes.
The District currently provides electric service to approximately 131,000 retail customers,
including over 8,300 in the Mountain House community in San Joaquin County. The District
notes that retail electric consumption has remained relatively flat over the long-term, with a
modest increase in more recent years.
MID’s revenue estimates are influenced by growth projections for Stanislaus County
(including the communities of Salida and Empire) and the cities of Modesto, Riverbank, and
Waterford. At this time, no significant growth is anticipated.
2. The location and characteristics of any disadvantaged, unincorporated communities
within or contiguous to the sphere of influence.
Based on annual median household income, there are several areas identified as
Disadvantaged Unincorporated Communities (DUCs) as defined in Section 56033.5 of the
Cortese-Knox-Hertzberg Act of 2000. These communities include the town of Empire and
the Airport, West Modesto, and Rouse Neighborhoods. No additional DUCs have been
identified within the District’s sphere of influence. There are several DUCs adjacent to the
District’s boundaries. However, those areas are located within the Turlock Irrigation District’s
boundaries.
3. Present and planned capacity of public facilities, adequacy of public services, and
including 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.
Irrigation
The District utilizes long-term planning documents in order to assess current capacity and
future needs for services. In 2007, with assistance from the Irrigation Training and
Research Center (ITRC), the District began work on a Comprehensive Water Resources
Management Plan to assess long-term needs and opportunities for water delivery service.
As part of the implementation of this plan, the District installed a new irrigation control
SCADA (Supervisory Control and Data Acquisition) system and automation upgrades. In
2020 the District also completed the Main Canal Reservoir to increase distribution system
flexibility and capacity.
MSR & SOI Update – Modesto Irrigation District Page 7
As required by SBx7-7, MID prepared its first Agricultural Water Management Plan in 2012,
followed by an update in 2015 and again in 2020. The AWMP describes MID’s water
supplies and irrigation demands, local conditions, facilities and operations, rules and policies
and a variety of water management activities, including a series of efficient water
management practices (EWMPs) designed to improve water use efficiency. The 2020
AWMP provides a list of capital projects from 2015-2020 that are consistent with its goals
and EWMPs. The list of projects includes the following: Dr. Moor Headworks Project,
Lateral 9 Headworks Project, Tully Lateral Headworks Weir, Waterford Lateral 10 Weir,
Lower Main Canal Lining Project, Waterford Lateral 9 Weir, Little Shoemake Pipeline
Replacement, Miller Lake SCADA Project, Waterford Lateral 3 Headworks, Lateral 3 Drop
48 Weir, Beard Ditch Dry Creek Crossing, Lateral 4 Drop 33, Rose Avenue Pump Station
Project, Tidewater Culvert Crossing Rehabilitation, Main Canal Reservoir Project, Lateral 3
Flume, Pelton Flume and Main Canal Check Structure projects.
Wholesale Domestic Water
The City of Modesto and the MID have prepared a joint Urban Water Management Plan
(UWMP) for 2020, finalized in June 2021. The plan acts as a planning tool for both
agencies in developing, managing and delivering municipal water supplies to the joint water
service area.
The Modesto Regional Water Treatment Plant, completed in 1994, could be expected to
supply the City of Modesto’s growing demand for potable water which has resulted from
poor water well quality and the increase in growth anticipated by the City’s Modesto Urban
Area General Plan. Phase 2 of the Plant was completed in June of 2016. The plant is
capable of producing 60 million gallons per day of treated water to the City’s drinking water
supply.
Electric Service
As part of MID’s capital improvement program, the District completed installation of a 16-
mile long Westley-Rosemore Transmission Line in 2008. The transmission line brings up to
350 megawatts of power to the District from throughout California and the western United
States.
The District’s 49 MW Woodland Generating Station Unit 1 was commissioned in 1993. Its
gas turbine engine is aging and is no longer supported by the manufacturer or repair
facilities. In order to enhance its reliability, the District began a capital project in early 2022
to replace the existing engine with a newer engine with similar generating capacity. This
project is expected to be completed by Q3 2023.
Current state legislation requires the District to obtain 60% of its electricity from renewable
sources by 2030. MID’s current portfolio contains approximately 34% renewable energy.
4. Financial ability of agencies to provide services
The District’s annual budget process is designed to screen out unnecessary costs and is
submitted to the Board of Directors for review and approval. Rates and fees for services are
adjusted periodically to meet budget needs.
MSR & SOI Update – Modesto Irrigation District Page 8
According to the District’s yearly audit report, assets increased by approximately $11.2
million in 2020. The increased is based on a combination of changes in the District’s
portfolio from long-term investments to short-term plus electric sales increasing cash.
The District routinely buys, sells, and exchanges electric power and transmission capacity
with other utilities located throughout the Western United States and Canada in order to
reduce operating costs, provide improved facility utilization and revenue, and increase
operating reliability.
Currently, the District sells treated surface water to the City of Modesto on a wholesale
basis, and utilizes the revenue to pay off the existing bonds, which financed the original
construction of the domestic water facilities. The process is “revenue neutral” for the
District, as the revenues received from the City pay for plant operations and bond
retirement, with no profit.
The District participates in a variety of joint agency practices, which maximize cost
avoidance opportunities (e.g., Stanislaus and Tuolumne Rivers Groundwater Association,
Transmission Agency of Northern California, Modesto-Santa Clara-Redding Public Power
Agency, San Joaquin Tributaries Authority). MID also shares staff with unique skills and
training, specialized equipment, spare parts and materials with other public agencies and
utilities to minimize costs and to improve response to routine and emergency customer
needs.
5. Status of, and opportunities for, shared facilities
MID has many jointly owned facilities with other public agencies and also participates in
many joint powers agencies (JPAs) that own facilities. Some of MID’s major jointly owned
and JPA facilities include:
Don Pedro Dam and Reservoir (31.54% MID, 68.46% TID).
Don Pedro Power Plant (31.54% MID, 68.46% TID).
La Grange Reservoir (50% MID, 50% TID).
Westley-Parker-Walnut 230kV transmission line (50% MID, 50% TID).
Westley-Tracy 230kV transmission line and substation original facilities (50% MID,
50% TID).
New Hogan Power Plant (0% MID, 100% Calaveras County Water District). MID
built, operates and maintains the plant and is entitled to the power output for a 50
year term.
California Oregon Transmission Project 500 kV lines and substations (MID share
about 320 MW through the Transmission Agency of Northern California JPA.)
Lodi Energy Center 302 MW combined-cycle antural gas power plant operated by
the Northern California Power Agency (10.71% MID share).
Shared right-of-way.
MID also has agreements with the City of Modesto, the City of Riverbank, the Oakdale
Irrigation District and Stanislaus County that permit limited use of MID canals for the
conveyance of storm water drainage.
6. Accountability for community service needs, including governmental structure and
operational efficiencies
MSR & SOI Update – Modesto Irrigation District Page 9
A five-member Board of Directors governs the District. Registered voters within a
geographical area or “Division”, elect the board members. The Board conforms to the
provisions of the Brown Act requiring open meetings. The District has also established a
website (www.mid.org) which is user-friendly and provides information such as the history
and services of the District, water updates, news, education, board agendas, rates and fees,
and annual reports.
It is reasonable to conclude that the District has the organizational capability to 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
2020-2022 have been severe and record breaking dry years for California. Due to such dry
conditions, MID is operating in an extremely conservative matter during the irrigation
season. Also, MID has implemented special drought operation rules and programs to help
utilize irrigation water as efficiently as possible.
MSR & SOI Update – Modesto Irrigation District Page 10
Sphere of Influence Update for the
Modesto Irrigation District
In determining the 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 they are relevant.
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.
This document proposes no changes to the District’s existing Sphere of Influence. Rather, it
serves to reaffirm the existing SOI boundary. As part of this process, Staff researched the
history of the establishment of the District’s SOI. A map of the current District boundary and
Sphere of Influence is attached as Appendix “A”.
The following determinations for the Modesto Irrigation District Sphere of Influence update are
made in conformance with Government Code §56425 and Commission policy.
Sphere Determinations:
1. The present and planned land uses in the area, including agricultural and open-space
lands
The Modesto Irrigation District’s current irrigation water service area is comprised of
approximately 101,700 acres. An additional 41,600 acres lie within the District’s Sphere of
Influence (SOI). The land uses within the District boundaries and SOI consist of agricultural,
rural residential, suburban and urban land use areas. Planned uses for the area are
described in the general plans of Stanislaus County (including the Salida Community Plan),
and the cities of Modesto, Waterford, and Riverbank. 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 are retained by Stanislaus County and the cities of Modesto, Riverbank, and
Waterford.
MSR & SOI Update – Modesto Irrigation District Page 11
2. The present and probable need for public facilities and services in the area
The District has provided irrigation water for agriculture since 1904, and currently delivers
irrigation water to over three thousand customers farming approximately 60,000 acres. The
present and future public service needs within the District’s (irrigation water) boundaries are
characteristic of agricultural areas. The types of public services needed in these areas are
of the type, which enhance the use of the land for agricultural purposes. As discussed in the
Service Review section, the District is utilizing a Comprehensive Water Resources
Management Plan in order to improve operational efficiency.
Since 1995, the District has provided domestic water and currently supplies 40% of the
drinking water for the City of Modesto via the Modesto Regional Water Treatment Plant
(MRWTP). As a result of increased water quality regulations and water demands, the
plant’s capacity has been expanded to 60 million gallons per day (mgd). This is expected to
assist in meeting the demands associated with the City of Modesto’s Urban Area General
Plan.
As discussed in the Service Review section, the District is actively increasing its renewable
energy profile in order to meet state mandates for 60 percent renewable energy sources by
by 2030.
3. The present capacity of public facilities and adequacy of public services that the
agency provides, or is authorized to provide.
The District presently has adequate capacity and/or plans to provide the necessary public
facilities and services within its existing sphere of influence. For example, the District and
City of Modesto recently completed the Modesto Regional Water Treatment Plant Phase
Two expansion. This phase will double the capacity of MID’s water treatment plant thus
providing needed water supply to the community.
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 following jurisdictions can be categorized as Communities of Interest in the area: the
cities of Modesto, Oakdale, Riverbank, and Waterford, and the unincorporated communities
of Empire, Salida, and La Grange, in Stanislaus County. The District also provides
electricity to the cities of Escalon and Ripon, and the unincorporated community of Mountain
House in San Joaquin County.
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
There are several areas identified as disadvantaged unincorporated communities (DUCs)
within the existing MID Sphere of Influence. These communities include the town of Empire
and the Airport, West Modesto, and Rouse Neighborhoods. The District provides part of the
City of Modesto’s water supply for residential and commercial purposes. The City of
Modesto serves all of the mentioned DUCs. The District does not provide services related
to sewers or structural fire protection.
MSR & SOI Update – Modesto Irrigation District Page 12
DISTRICT SUMMARY PROFILE
District: MODESTO IRRIGATION DISTRICT (MID)
Formation: July 18, 1887
Location: The District’s boundary includes certain acreage between the Stanislaus,
San Joaquin, and Tuolumne Rivers, adjacent to the Oakdale Irrigation
District in Stanislaus County. MID also has an electrical service area that
extends beyond this boundary to the north, into San Joaquin County, a
small portion of Tuolumne County, as well as the Mountain House area.
Service Area: Irrigation - 101,700+/- acres
(159 square miles)
Electrical - 362,880+/- acres
Modesto
(567 square miles)
Irrigation
District
Customers: 3,104 irrigation accounts
131,535 electrical accounts
SOI
Land Use: Agricultural, rural residential,
suburban and urban
STANISLAUS
District Services: Distribution of water for
COUNTY
irrigation and domestic
purposes and provision of
electricity
Enabling Act: California Water Code,
Division 11: Irrigation
Districts, §20500-29978
Governing Body: Five-member Board of Directors, elected by the registered voters within
five geographic divisions of the District’s boundaries
Administration: 458 employees
Adopted Budget: Calendar Year 2022: $139,238,436
Revenue Sources: Power sales (residential, commercial and industrial), wholesale power,
domestic water, irrigation water, and interest earnings
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REFERENCES
1. Association of California Water Agencies (ACWA) (www.acwanet.com).
2. Baker Tilly, “Financial Statements and Supplementary Information – Modesto Irrigation
District”, December 31, 2021 and 2020.
3. California Department of Water Resources (www.dwr.water.ca.gov).
4. California State Water Resources Control Board (www.swrcb.ca.gov).
5. City of Modesto / Modesto Irrigation District, “Joint Urban Water Management Plan 2005
Update”, May 2007.
6. Irrigation Training And Research Center, California Polytechnic State University,
“Comprehensive Water Resources Management Plan – Phase 1”, February 2008.
7. Modesto Irrigation District, “2022 Detailed Budget”.
8. Modesto Irrigation District website (www.mid.org).
9. Previous MSR/SOI Update for the Modesto Irrigation District, Adopted by Stanislaus
LAFCO on February 22, 2017.
10. State of California Legislative Analyst’s Office Report – “Water Special Districts: A Look
at Governance and Public Participation, March 2002”.
11. U.S. Bureau of Reclamation (www.usbr.gov).
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