For infrastructure planning it is also important to look at the supply by pressure zone. In addition to the water sources discussed in this chapter, some pressure zones may receive water from other pressure zones. This can be done through PRVs from a higher pressure zone or booster pump stations from a lower zone. Table 3-6 compares the water coming into a zone with the peak water demand in each zone. Deficits shown may be satisfied by higher pressure zones depending on how the system is operated.
Pressure Zone | JVWCD Connections | Wells | Pump Stations | Total Inflow | 2021 Peak Day Demand (gpm) | 2021 Surplus / (Deficit) (gpm) | Buildou t Peak Day Demand (gpm) | Buildout Surplus / (Deficit) (gpm) |
Pressure Zone | JVWCD Connections | Wells | Pump Stations | Total Inflow | 2021 Peak Day Demand (gpm) | 2021 Surplus / (Deficit) (gpm) | Buildou t Peak Day Demand (gpm) | Buildout Surplus / (Deficit) (gpm) |
Zone 1 | 28,300 | 28,300 | 11,583 | 16,717 | 12,211 | 16,089 | ||
Zone 2 | 15,708 | 13,000 | 28,708 | 5,766 | 22,942 | 5,911 | 22,797 | |
Zone 3 | 1,045 | 4,800 | 5,845 | 9,649 | (3,804) | 10,478 | (4,633) | |
Zone 4 | 2,715 | 3,380 | 8,500 | 14,595 | 6,191 | 8,404 | 11,797 | 2,798 |
Zone 5 | 0 | 6,168 | (6,168) | 9,540 | (9,540) | |||
Zone 6 | 2,215 | 4,400 | 6,615 | 1,823 | 4,792 | 4,991 | 1,624 | |
Zone 7 | 0 | 0 | 0 | 1,601 | (1,601) | |||
Total | 48,938 | 4,425 | 30,700 | - | 41,181 | 42,882 | 56,528 | 27,535 |
Zone 3 shows a small deficit, but there is sufficient surplus in Zone 4 that peak demands can be met through PRVs. One deficit to note is in Zone 5. This zone is currently supplied by Zone 6. However, the 2021 deficit is greater than excess supply in Zone 6, which would be problematic if the peak demand occurred for multiple days in a row. For this reason, the City is currently working on a new JVWCD connection and pump station to deliver water directly to this zone, rather than delivering water through Zone 6.
At buildout, deficits are shown in Zones 3, 5, and 7. Projects to address these deficiencies are shown in subsequent chapters.