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Nacimiento Dam Spillway Modifications Design Overcomes Seismic, Hydraulic Challenges

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SAME 2009 California Water Conference
SAME 2009 California Water Conference
TechnologyBusiness
1 of 35
Nacimiento Dam Spillway Modifications – Design Challenges Blaine N. Dwyer 2009 SAME Water Conference Sacramento, California October 27, 2009
Project Purpose ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Acknowledgements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Location
Salinas River Flows
Main Design Components ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],MCWRA photo
Nacimiento Dam and Spillway
Project Features ,[object Object],[object Object],[object Object],[object Object]
Spillway ,[object Object],[object Object],[object Object]
Spillway, cont. ,[object Object],[object Object]
Spillway History
High-level Outlet ,[object Object],[object Object]
Existing Proposed
Approach Channel
M ,[object Object],[object Object],[object Object],[object Object],MCWRA Photo Design Challenges
Main Project Components ,[object Object],[object Object],[object Object],[object Object]
Geotechnical Considerations Seismic Ground Motions – 1.12g
Geotechnical Considerations Foundation conditions: spillway always on bedrock or lean concrete on bedrock.
Geotechnical Considerations Foundation conditions: spillway always on bedrock or lean concrete on bedrock.
Main Project Components ,[object Object],[object Object],[object Object],[object Object]
Structural Modifications ,[object Object],[object Object]
Structural Modifications ,[object Object],[object Object],[object Object]
Structural Modifications ,[object Object],[object Object]
Structural Modifications ,[object Object],[object Object],[object Object],[object Object]
Main Project Components ,[object Object],[object Object],[object Object],[object Object]
Gate Design ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Gate Design ,[object Object],[object Object],[object Object]
“ Obermeyer” Inflatable Gate
Main Project Components ,[object Object],[object Object],[object Object],[object Object]
Physical Hydraulic Model ,[object Object],[object Object],[object Object]
Physical Model
Non-uniform Flow … means asymmetric walls
Wall Completion MCWRA photo
Project Design Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Nacimiento Dam Spillway Modifications 2009 SAME Water Conference Sacramento, California October 27, 2009 Contact: Blaine Dwyer – blaine.dwyer@aecom.com

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