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<br /> highest in the State at 4.79 percent(City of Lathrop, 2020). More than 18,000 single-family and 350 multi-family units
<br /> are approved to be built over the next 20 years. Per the City's 2015 UWMP,the population served is projected to reach
<br /> 74,577 people by 2040 and 93,485 at buildout (EKI, 2017). To continue to meet the water needs of the growing
<br /> community,the City carefully manages its available water resources.
<br /> 1.1.2 River Islands at Lathrop
<br /> The City has a number of approved and developing large development projects within the City's boundary, the largest
<br /> of which is River Islands. River Islands is a mixed use, water-oriented master-planned community, containing
<br /> approximately 4,905 acres located west of the San Joaquin River on Stewart Tract and Paradise Cut (a flood control
<br /> bypass connecting the San Joaquin River and Old River in the Sacramento-San Joaquin River Delta).The River Islands
<br /> development area is shown in Figure 2. The new development is bringing new residences along with retail services,
<br /> educational and recreational amenities, employment, and environmental enhancements to the City.
<br /> The River Islands project area can be delineated into Phase 1 and Phase 2 areas. A mix of low-, medium-, and high-
<br /> density residential units are proposed, consisting in total of 15,010 homes (Phase 1 and 2, combined). Since 2014,
<br /> River Islands continues to construct new housing adjacent to an extensive lake system, with connectivity to the
<br /> surrounding rivers, allowing a range of lifestyles from more urban to more rural. Mixed-use commercial and town
<br /> centers will include a variety of workplaces,retail,entertainment,and restaurant venues. In addition,a number of parks
<br /> and schools are proposed throughout the Phase 1 and Phase 2 areas, with two public schools and six public parks
<br /> already constructed. About 1,500 residential units were constructed and occupied by the end of 2019, with estimated
<br /> completion of Phase 1 in 2025. Phase 1 was the subject of a previous WSA, developed in August 2002, entitled City
<br /> of Lathrop SB 610 Water Supply Assessment Report for Mossdale Landing, River Islands at Lathrop, and Lathrop
<br /> Station (2002 WSA) (Nolte, 2002). This WSA has been prepared to address the proposed general plan and West
<br /> Lathrop Specific Plan amendments for the Phase 2 development of River Islands proposed by the developer.
<br /> 1.1.3 South San Joaquin Irrigation District
<br /> South San Joaquin Irrigation District(SSJID) supplies the City with imported treated surface water through the South
<br /> County Water Supply Program (SCWSP). SSJID was formed in 1909 under the Irrigation District Act and covers
<br /> approximately 72,000 acres in the southeastern portion of San Joaquin County. The Cities of Manteca, Ripon, and
<br /> Escalon account for approximately 20,000 acres of the SSJID service area. In 2005, SSJID began delivery of up to
<br /> 32,000 acre-feet per year(AFY)of treated surface water from Woodward Reservoir to the Cities of Manteca, Lathrop,
<br /> and Tracy for the SCWSP;this volume is expected to increase to up to 43,000 AFY with implementation of Phase II of
<br /> the SCWSP. The City of Escalon is also expected to receive treated surface water from SSJID in the future. River
<br /> Islands will receive a total of 3,500 acre-feet(AF)of SCWSP potable water in accordance with an agreement with the
<br /> City.
<br /> 1.1.4 Project Description
<br /> The Project covers an area of approximately 2,500 acres of land and open space located west of the Phase 1
<br /> development area on Stewart Tract and Paradise Cut. The Project proposes to expand beyond Phase 1 development
<br /> to accommodate additional residential, retail, and commercial development. Residential development includes multi-
<br /> family dwellings (condominiums, apartments, etc.) as well as attached single-family homes similar to units already
<br /> constructed with Phase 1. A"Village Center" mixed-use area at Paradise Road is planned, as is a mixed-use transit-
<br /> oriented development as part of the Employment Center District that complements the future planned Valley Link
<br /> (formerly ACE)transit station. In total,buildout of Phase 2 is projected to result in 10,726 new residential dwelling units.
<br /> Phase 2 also includes additional lakes, parks, schools, and an expansion of the transportation/circulation system.
<br /> Figure 3 presents the land use designations for the Project, and planned Project development is detailed by land use
<br /> type in Table 1.Additional information regarding the Project can be found in Appendix A.
<br /> Califia(0011533.00) 2 Woodard&Curran, Inc.
<br /> River Islands Phase 2 Development Water Supply Assessment September 2020
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