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LOWER BAKER FLOW IMPLEMENTATION DEVELOPMENT OF UNIT 4 POWERHOUSE

LOWER BAKER FLOW IMPLEMENTATION DEVELOPMENT OF UNIT 4 POWERHOUSE. Jeffrey Reichmuth Consulting Engineer. February 18, 2014. TOPICS OF PRESENTATION. 30MW Hydroelectric Facility with Synchronous By-pass Valve and Neighboring 85MW U3 Aquatics Requirements Key to License

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LOWER BAKER FLOW IMPLEMENTATION DEVELOPMENT OF UNIT 4 POWERHOUSE

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  1. LOWER BAKER FLOW IMPLEMENTATIONDEVELOPMENT OF UNIT 4 POWERHOUSE Jeffrey Reichmuth Consulting Engineer February 18, 2014

  2. TOPICS OF PRESENTATION • 30MW Hydroelectric Facility with Synchronous By-pass Valve and Neighboring 85MW U3 • Aquatics Requirements Key to License • Minimum In-Stream flow 1200cfs/1000cfs • Ramping Requirements, 1inch per Hour • Control Strategies – Dam, Unit 3, Unit 4, SBV • Economic Dispatch • Construction Started December 2010 • Commissioning June 2013

  3. Baker River Hydroelectric Project, Concrete, WA

  4. LOWER BAKER PROJECT AREA

  5. Skagit River Near Concrete Washington Skagit River USGS Gage for In-stream Flow Compliance Baker River USGS Gage - Minimum In-Stream Flow 1200/1000 cfs Ramping Restrictions in effect when flow below 26,000 cfs in Skagit River

  6. Aquatics Table Mandating Flow

  7. Aquatics Ramping Rate Figure Ramping Rate in Inches per Hour

  8. Down Ramp of Facility based on Aquatics Table

  9. SITE SELECTION PROCESS • FERC License 2150 – October 17, 2008 • FERC - Board of Consultants Selected • Various Sites And Options Reviewed • Option With Synchronous By-pass Valve • Ultimately Selected Site 5 • Geotechnical Baseline Report Prepared • Slope Stability Exploration Plan Prepared Site 1 – Low Level Outlet in Dam Site 2 – South Portal PH in Cavern Site 3 – Old Units #1 and #2 Location Site 4 – PH South of Unit #3 Site 5 – PH 400 Feet South of Unit #3,Two Tunnel Length Options

  10. ALIGNMENT OF UNIT 4 POWER TUNNEL

  11. Geologic Perspective of Facility Arrangement

  12. SLOPE STABILITY MEASURES • Slope Stability Exploration Indicated Movement Of Slope During Wet Seasons • Buttress Wall Built at Main Powerhouse Excavation • Soldier Pile Wall Built Near Access Road • Horizontal Drains Installed Into Slope • Constant Electronic Slope Monitoring Installed • Evacuation Alarm Installed For Construction

  13. Subterranean Powerhouse • Autodesk – Navisworks Model, Developed by Black and Veatch

  14. Section Through Powerhouse • Section through Navisworks Model

  15. OWNER FURNISHED EQUIPMENT • PSE Supplied the Turbine, Generator and the Station Transformer • Turbine Provided by Litostroj Power, Ljubljana, Slovenia • Generator Provided by Končar Generators and Motors, Zagreb, Croatia • Station Transformer Provided by Waukesha Electric Systems, Waukesha, WI

  16. Generator Installation • Setting the Rotor with 550T Mobile Crane

  17. Synchronous By-pass Valve

  18. Just add water…

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