Tennessee Valley Authority · NYSE:TVC
Tennessee Valley Authority — Corporate Update (July 2009)
14 slides from Tennessee Valley Authority's corporate update, Jul 15, 2009
Slide 1: Bear Creek Dam Rehabilitation Project
Bear Creek Dam Rehabilitation Project Presented by Susan Kelly July 15, 2009
Slide 2: Bear Creek Dam Pre-Construction
Bear Creek Dam Pre-Construction 2
Slide 3: EIS: Preferred Alternative
EIS: Preferred Alternative • Modify the dam and restore the 576-foot operating pool • Construct a roller-compacted concrete berm at the toe of the existing dam • Benefits: – Retains intended benefits of flood protection, water supply, recreation, and economic development – Provides protection from p
Slide 4: Construction Report Update
Construction Report Update Activity Status Site mobilization Complete Excavation Complete Dewatering system installation Complete Foundation treatment Complete Roller compacted concrete berm Complete Site restoration and demobilization Complete Project completion/return to service Complete Ribbon cu
Slide 5: Slide 5
Slide 6: Concrete Berm, Downstream Face
Concrete Berm, Downstream Face 6
Slide 7: Concrete Berm, Upstream Face
Concrete Berm, Upstream Face 7
Slide 8: Concrete Berm from Spillway
Concrete Berm from Spillway 8
Slide 9: Bear Creek Dam Post Construction
Bear Creek Dam Post Construction (Rendering) 9
Slide 10: Blue Ridge Dam Rehabilitation Project
Blue Ridge Dam Rehabilitation Project Presented by Susan Kelly July 15, 2009
Slide 11: Slide 11
Slide 12: Background
Background • Major components are damaged or deteriorating • Seismic concerns • Deep drawdown required to check condition every five years 12
Slide 13: Scope of Work
Scope of Work • Repair the penstock – Remove vertical reinforcing girder – Remove penstock bulge – Install a new steel liner • Seismic modifications – Reinforce the water intake tower – Install filter and replace riprap on upstream embankment – Install filter and add riprap on downstream embankment
Slide 14: Proposed Drawdown
Proposed Drawdown • Repairs will require a deep drawdown • Plans are to begin slowly drawing down the reservoir between mid-July and early September 2010 • The reservoir will be held under elevation 1630 for six to nine months • Assuming adequate rainfall, the reservoir will be refilled in late spri
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