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Fossil Hydro Leadership Meeting

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Fossil Hydro Leadership Meeting

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    1. Fossil & Hydro Leadership Meeting

    2. Brayton Point Station Closed Cycle Cooling Natural Draft Cooling Towers

    4. Cooling Tower – Artist Rendering

    5. Cooling Tower – Arrangement Overlay

    6. Natural Draft Cooling Tower 3D Model Integration

    7. Closed Loop Cooling – Project Status Brayton’s use of once through cooling water has been a regulatory issue since 1970’s Decline of flounder in the bay in the late 1980’s sharpen DEP/EPA focus on Brayton October 2003 EPA issue Brayton a NDPES permit that only could be met with closed cycle cooling Permitting commenced January 2008 – Final permits received May 13, 2009 Current EPA order schedule requires in-service by winter 2011 – spring 2012 > 95% reduction in cooling water flow and thermal discharge First natural draft cooling towers built in the United States in ~20 years

    8. Closed Loop Cooling – Project Status Kiewit Construction Co. – awarded EPC in August of 2008 Engineering approximately 76% complete Cooling tower foundation commence on May 14, 2009 Tower piles completed on September 3, 2009; 10 weeks early 1,592 total piles to driven for cooling towers Tower supports are 20” square concrete PSCP Project Facts 1.5 miles of circ water tunnels 75,000 cubic yds of concrete 10,000 tons of reinforcing steel 6,500 feet of conduit

    9. Natural Draft Cooling Tower Fundamentals

    10. Natural Draft Cooling Tower Fundamentals

    11. Cooling Tower Details Shell 497’ tall 365’ diameter at the base 222’ diameter at the outlet Each tower will be surrounded by a noise reduction wall 2010 Activities Major focus in 2010 will be the erection of the cooling tower

    12. DOKA Climbing Forms

    13. DOKA Climbing Forms

    14. DOKA Climbing Forms

    15. Closed Loop Cooling – Positive Financial Impacts Total project cost to Dominion - $620,000,000 Infusion of multi-millions of dollars into the local economy Material suppliers Sub-contractors Lodging and restaurants Employment of 250 + local union trades Continued viability of Brayton Point Station as a large local employees for years that follow

    16. Cooling Tower Project Challenges Aggressive Compliance Schedule Retrofit of Closed Loop Cooling while Maintaining Station Operations Lack of Recent Natural Draft Experience in the U.S. Construction Market Large (60” - 108”) Bore Piping Installed through the “Heart” of the existing Station undergrounds Material Lead Times – 60-70 weeks for pumps Magnitude of Construction Impacts on Station Access and Existing Operations Weather Constraints on Tower Erection

    17. Closed Loop Cooling – View Looking North

    18. Closed Loop Cooling – View Looking North

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