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Alamo power plant – unit 2

Division of Engineering Presented By: Terry Becker Date: 12-12-2012. Alamo power plant – unit 2. Agenda and Overview. Introduction Project Location Summary of Work Project Timelines Project Budgets Project Considerations. Introduction. Background

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Alamo power plant – unit 2

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  1. Division of Engineering Presented By: Terry Becker Date: 12-12-2012 Alamo power plant – unit 2

  2. Agenda and Overview • Introduction • Project Location • Summary of Work • Project Timelines • Project Budgets • Project Considerations

  3. Introduction • Background • Purpose: Install Second Generating Unit at Alamo Power Plant to maximize the generation capacity of water that is delivered through the East Branch of the California Aqueduct • Alamo Power Plant • Located on the East Branch of the California Aqueduct bifurcation • Plant was constructed between 1982 and 1985, operational 1986 • 133-FT Static Head Differential between Tehachapi Second After Bay and Pool 43 of CA. Aqueduct • Turbine Generation Unit 1: • Kaplan Type Turbine • 18 MW Generation Capacity, downgraded to 16 MW post TEA construction • Plant Hydraulic Capacity is 3150 cfs, 1740 cfs for Unit 1 and 1410 cfs for Unit 2 • Turbine Generation Unit 2: • To Be in Future Contract (Francis Turbine)

  4. General Map - EastBranch Aqueduct Tehachapi Mountains Teerink Pumping Plant BuenaVista Pumping Plant Tehachapi East Afterbay Edmonston Pumping Plant Alamo PowerPlant Chrisman PumpingPlant Oso PumpingPlant Pearblossom Pumping Plant West Branch East Branch

  5. TEA, Cottonwood Bypass, and Alamo Power Plant

  6. Alamo Powerplant

  7. Alamo Powerplant

  8. Alamo Powerplant • Existing Kaplan Turbine Unit No.1 • Void left for future FrancisTurbine Unit No. 2

  9. Alamo Powerplant • Existing Kaplan Turbine Unit 1

  10. Alamo Powerplant • & EL. 2948 • Existing Kaplan Turbine Unit 1 Generator Shaft

  11. Alamo Powerplant • Existing Unit 1 Penstock in the Generator Cooling Room

  12. Alamo Powerplant • Existing Unit 1 Penstock in the Coupling Chamber • Watertight door

  13. Alamo Powerplant – Unit 2

  14. New Francis Turbine GENERAL PLAN Existing Tehachapi East After Bay New Surge Tank Existing 12 Ft Diameter Penstock PROFILE

  15. Alamo Powerplant - Layout Existing hatch and location of Kaplan Unit 1 New Francis Unit 2 Alamo Powerplant

  16. Scope of Work 12 FT Diameter Penstock Electrical Generator Civil Engineering Connect Existing Penstock to new turbine unit Construction of concrete containment of new turbine unit Construction of new surge tank Additional Site Work - Civil Mechanical Engineering Install Francis Turbine Unit and all pertinent features Electrical Engineering Electrical Generator Excitation Governor Control System Protection System Additional Site Work - Electrical Sleeve couplings Encase Reducer in Existing Opening Francis Turbine Fill void in existing Building with concrete

  17. Project Schedule

  18. Project Budget Project Cost * Note: Benefit/Cost Ratio without enlargement of the East Branch = 1.28

  19. Project Considerations • Power Acquisitions • Right of Way • Environmental • FERC • Confined Space • High Voltage Hazards during Testing and Startup

  20. New Francis Turbine GENERAL PLAN Existing Tehachapi East After Bay New Surge Tank Existing 12 Ft Diameter Penstock PROFILE

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