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Central Arizona Project (CAP) Central Arizona Project (CAP) “… the steward of central Arizona's Colorado River water entitlement …” A municipal corporation/public improvement district Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 1 Original Intent –alaMo Udall • Provide for economic growth • Construction Payrolls ‐ $465M • Grand Canyon untouched • Peace on the River • Studies of future augmentation/xfers • http://www.library.arizona.edu/exhibits/u dall/congrept/90th/681010.html Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 2 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 3 CAP Facts • Length: 335 miles • Cost: $4 Billion • Construction: 20 years • Capacity: 1.7 Maf/yr • Power: 3,000 kWh • Water Supply: ~4 Mill • Irrigation: 700‐283 kaf • Siphons: 9 • Width,Depth 46,16.5 ft • 0.7 M yd3 concrete (16%) www.cap‐az.com http://www.usbr.gov/projects/Project.jsp?proj_Name=CArizona Water Issues © 2012 The Universityentral%20Arizona%20Project&pageType=ProjectDataPage of Arizona ‐ HWR203 4 CAP Timeline ”throughout all this struggle our state came before politics” • 1922 Colorado River Compact • 1940 AZ open to compromise • 1944 AZ ratified CRC • 1946 AZ CAP starts lobbying • 1963/64 AZ v. CA ruling • 1968 LBJ signs CAP auth. • 1971 Central AZ Water Cons. Dist. (CAWCD) to payback US • 1973 Construction begins • 1993 CAP reaches Tucson azmemory.azlibrary.gov/cdm/singleitem/c • 1994 Notice of Completion – ollection/uoamku/id/26/rec/613 payback time! Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 5 Sidenotes • 1977 Carter tries to kill 19 western water projects & CAP • 1979 Andrus/Babbitt want stronger GW regulation • 1980 GW Mgmt. Act (Rep‐ dominated legislature!) • Creates ADWR to manage it • Ag H2O was 2‐3x orig. est. • 93‐94: low cotton prices, farms threaten bankruptcy • 500,000 ac to 50,000 ac! • 1995‐99 Prop 200 halts TW deliveries • No buyers –how to repay? 2004 AZ Water Rights Settlement – • 1999 653 kaf for Tribal claims, all long‐term Ag contracts ended, $1.65 B repayment cap still, Ag used 500 kaf in 2001 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 6 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 7 Power for Lift • Navajo Generating Station – 17 Mil MWh/yr – 2250 MW @ $650 M $700 Million! – scrubber @ $ 46 M – 8 Mton coal/yr In contrast: NGS: 24% of capacity • Hoover Dam supplies 95% of CAP lift – 4 Mil MWh/yr CAP buys ~ 4 Mil MWh/yr – 2200 MW Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 8 NGS Issues ‐ 4 Corners Haze Two types of controls are under consideration to reduce NOx emissions at NGS Low NOx Burners with Selective Catalytic Reduction Separated Overfire Air (SCR) COST: $46 million COST: $1.2 billion complete 2011 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 9 Cap Pumping Stations Total Station Number of units Total capacity, cfs Total dynamic head, ft horsepower Havasu‐Mark Wilmer 6 3,000 824 360,000 Bouse Hills 10 3,000 118 54,000 Little Harquahala 10 3,000 115 54,000 Hassayampa 10 3,000 194 54,000 Salt‐Gila 10 2,800 86 32,800 Tucson Aqueduct Brady 8 1,240 148 28,000 Picacho 6 930 232 33,000 Red Rock 5 775 232 27,500 Twin Peaks 6 621 84 8,100 Sandario 6 621 86 8,100 Brawley 5 580 229 20,500 San Xavier 5 580 172 20,500 Snyder Hill 9 410 293 24,300 Black Mountain 5 200 397 14,000 Waddell Pump/Generating Plant Adjustable speed pumps 4 1,900 192 43,200 Pump/Generators 4 2,100 192 56,400 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 10 Conversions • Capacity: Flow rate (cfs) – cfs * 724 = af/yr * uptime (75%) • Power: horsepower (hp) – hp * 0.735 * 24 hr/d *365 d * .75 * eff. = kWh • Cost: $90 Mil / 3 Mil MWh = $ 30/MWh – Incremental: MWh * $30/MWh / af = $/af Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 11 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 12 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 13 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 14 109 kaf @ $40/af 847 kaf @ $42/af 168 kaf @ $47/af 114 kaf @ $99/af 109 kaf @ $115/af Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 15 only 100 kaf left! Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 16 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 17 CAP Who’s who US DoI USBR – build CAP • CAWCD – AZ Cities manage CAP • ADWR Ag _MWD • CAGRD • AMA ; AWBA _ID TAMA: 80 kaf/y max PAMA: 310 kaf/y max GSF Demo’s Indirect Water Natural Cons. Direct In‐lieu Bank Rchg. Rchg. Rchg. Arizona Water IssuesTypes © 2012 of TheAquifer University “Savings” of Arizona ‐ HWR203Accounts 18 CAWCD PERMITTED RECHARGE CAPACITY Year Permitted Cumulative Project Name Complete Capacity Capacity Avra Valley 1996‐97 11,000 11,000 Pima Mina Road 1998‐99 30,000 30,000 Lower Santa Cruz 2000 50,000 80,000 Agua Fria 2001 100,000 180,000 Hieroglyphic 2002 35,000 215,000 Mountains Tonopah Desert 2006 150,000 365,000 Superstition Mts 2011 25,000 390,000 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 19 Arizona Water Issues © 2012 The University of Arizona ‐ HWR203 20.
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