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How do we know a water crisis is coming?

How do we know a water crisis is coming?. Assured Water Supply. How much water do we need?. Current usage = 59,000 acre feet (af) FICO 24,000 – 27,000 af PD Sierrita 26,000 – 29,000 af Golf Courses 3,600 af Municipal 3,800 af (both Sahuarita and Green Valley).

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How do we know a water crisis is coming?

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  1. How do we know a water crisis is coming?

  2. Assured Water Supply

  3. How much water do we need? Current usage = 59,000 acre feet (af) • FICO 24,000 – 27,000 af • PD Sierrita 26,000 – 29,000 af • Golf Courses 3,600 af • Municipal 3,800 af (both Sahuarita and Green Valley)

  4. How much do we have? Total recharge of 28,000 af per year • Natural storm water 19,000 af • FICO incidental 7,000 af • Effluent 2,100 af • GWRD 650 af

  5. This is a deficit of 31,000 acre feet per year

  6. Solutions = more water • CAP (Colorado River) water (Note: 5,408 acre feet will cover the municipal use of Green Valley and Sahaurita if it is filtered and piped directly. However, we still have the danger of subsidence as the aquifer continues to deplete at 2-3 ft per year. • Storm/rain water • Wastewater • Pump less water = eliminate heaviest usage

  7. Issues with CAP water • Water Quality – must be filtered • TDS = 800 mg/ltr • Radioactive chemicals from Uranium tailings?? • Allocations • High cost of delivery • Pipeline • Capital costs • Delivery costs • Interest on loan • Maintenance • Filtering

  8. CAP Allocations • Water Companies Community Water Co. = 2,858 af Green Valley Water Co. = 1,900 af • Phelps Dodge = 0 (declined 8,549 af) • Park Company = 4,444 af (terminated) • FICO (Pecans) = 0 (declined 1.39%) • Golf Courses = 0 • GWRD = 650 af Total allocations = 5,408

  9. Grandfathered water rights • FICO = 34,700 acre feet per year • Phelps Dodge = 37,900 acre feet per year • Public = 0 Question: Who passed out this water when they didn’t even know how much water was available?

  10. Storm water • Storm water is free • Storm water is relatively clean • Soil is a great water filter of bacteria, virus, but not dissolved solids or chemicals (CAP). Issues • How can we collect it efficiently? • Surface water rights • Collect in strategic locations

  11. COSTS • CAP water = $30 million for 5,000 af of allocations for initial set-up (full recommended plan) • Microbasins with dry wells: • Basin construction = $15,000 • Dry well = $15,000 • 2 projects with 2 wells each = $90 thousand for approx. several thousand feet??

  12. Possible Actions • Moratorium on building until water plan is in place (11-833) • All HOA’s required to use xeriscaping • File for surface water rights for public • Golf courses install drywells in low-lying areas • Microbasins w/dry wells to capture storm water • Storm-water Reservoirs in Santa Rita Mountains • Inflatable dams in washes • Stop Pima County from scouring out washes • Fish barriers = Bureau of Reclamation • Purchase pecan groves and convert to desert-landscaped park w/recharge basins

  13. Now, water is an issue….. If we wait until it is critical, it will be too late.

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