|
River Islands Development at Lathrop January 2021
<br /> Final River Islands Potable Water Technical Report-Rev 3 #6520
<br /> 6 Preliminary Improvement Implementation Schedule
<br /> 6.1 Preliminary Improvement Implementation Schedule
<br /> The River Islands PW demands should be regularly monitored to help update and confirm the installed
<br /> distribution system can reliable meet the system demands. The design of improvements should begin
<br /> when the installed system has reached 60-80 percent of its rated capacity, depending on the complexity of
<br /> the improvement. As described in Section 5 & 3, distribution systems must have a firm pumping capacity
<br /> capable of supplying the greater of the MDD + Fire Flow or PHD, and must have enough PW storage to
<br /> meet emergency, operational, and fire flow storage requirements.
<br /> Construction of River Islands is estimated to be completed by 2040, and will continue to be constructed
<br /> over separate stages. Based on conversations and planning documents provided by River Islands, Table
<br /> 6-1 shows the preliminary construction schedule of the River Islands development and the associated ADD,
<br /> MDD, and PHDs.
<br /> Table 6-1: Preliminary River Islands Construction Schedule &Associated Demands
<br /> No of Units or Acreage Completed&Connected
<br /> Land Use 2014-2020 2020-2025 2025-2030 2030-2035 2035-2040
<br /> Low Density Residential(per DU) 2,000.0 3,536.0 4,754.3 5,972.6 7,190.9
<br /> Medium Density Residential(per DU) 125.0 801.0 1,746.0 2,690.9 3,635.9
<br /> High Density Residential(per DU) 0.0 0.0 1,394.4 2,788.8 4,182.8
<br /> Commercial(per acre) 0.0 0.0 95.8 191.5 287.3
<br /> Industrial(per acre) 0.0 0.0 0.0 0.0 0.0
<br /> Parks(per acre) 10.8 17.4 24.0 30.5 65.1
<br /> Schools/Institutional(per acre) 15.8 38.4 43.8 49.0 61.8
<br /> Average Day Demand(GPD) 744,933 1,472,306 2,418,002 3,363,407 4,392,724
<br /> Average Day Demand(GPM) 517 1,022 1,679 2,336 3,051
<br /> Maximum Day Demand(GPD) 1,266,386 2,502,920 4,110,603 5,717,792 7,467,631
<br /> Maximum Day Demand(GPM) 879 1,738 2,855 3,971 5,186
<br /> Peak Hour Demand(GPD) 2,532,772 5,005,840 8,221,206 11,435,584 14,935,262
<br /> Peak Hour Demand(GPM) 1,759 3,476 5,709 7,941 1 10,372
<br /> Notes:
<br /> 1. Based on River Islands Village Detail (Phase 1 and 2) - Final V2.0 Spreadsheet showing the preliminary construction
<br /> schedule for the River Islands Development.
<br /> The Phase I BPS site is nearing completion and will be initially installed with a firm pumping capacity of
<br /> 6,000 GPM and a PW Storage Capacity of 1.5 MG. Based on the preliminary construction schedule and
<br /> associated demands shown in Table 6-1, Table 6-2 below shows the minimum preliminary improvement
<br /> implementation schedule in order for the River Islands distribution system to meet the firm pumping
<br /> capacity and PW storage requirements. It is recommended to coordinate the implementation of the
<br /> improvements to efficiency service the expanding development(i.e. install the 1.5 MG and 1.6 MG Phase
<br /> BPS tanks at once instead of piece meal).
<br /> Currently the City has allowed River Islands to utilize the existing City-wide fire storage capacity until the
<br /> future 1.5 and 1.6 MG tanks are installed at the Phase I BPS and Storage site. As shown below,the current
<br /> 2014-2020 potable water storage requirement is equal to the approximate maximum day demand of
<br /> 1,266,386 GPD (no dedicated fire storage required within River Islands).
<br /> 40
<br />
|