Transcript www.g-a-l.info

How do we know a water crisis is coming?
Assured Water Supply
Population
Estimated
2000
Pumpage
(Potable) af
2000
Central
Arizona
Project
Allocation
Effluent
Allocation
Assured
Water
Supply
Designation
MDWID
44,029
8,633
8,858
Yes
Yes
Town of Oro Valley
34,153
9,085
6,748
Yes
Yes
Community Water of G. V.
15,286
2,448
1,337
Green Valley Water Co.
4,757
2,225
1,900
Arizona Water Co.
4,140
379
Hub Water Co.
4,056
1,105
Marana Municipal Water
3,591
544
Yes
Yes
Las Quintas Serenas
3,080
422
Vail Water Co (Del Lago)
2,537
296
Voyager Water Co.
2,415
279
Farmers Water Co.
2,390
538
Sauhuarita Village
176
33
Rancho Sahurita
85
16
User
TOTAL PUMPAGE -- AF
38,942
47
786
Yes
How much water do we need?
Current usage = 59,000 acre feet (af)
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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)
How much do we have?
Total recharge of 28,000 af per year
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Natural storm water
FICO incidental
Effluent
GWRD
19,000 af
7,000 af
2,100 af
650 af
This is a deficit
of 31,000 acre
feet per year
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
Issues with CAP water
 Water Quality – must be filtered
– TDS = 800 mg/ltr
– Radioactive chemicals from Uranium tailings??
 Allocations
 High cost of delivery
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Pipeline
Capital costs
Delivery costs
Interest on loan
Maintenance
Filtering
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
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?
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
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??
Possible Actions
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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
Now, water is an
issue…..
If we wait until it is
critical,
it will be too late.