Newport Beach, CA

Indian Valley Reservoir


The Indian Valley Reservoir provides long-term irrigation storage and flood control. A 2010 inspection report recommended seismic analyses of the floodgates and control structure to confirm the gates could be raised following a earthquake. SGH evaluated the seismic performance of the two structures.

SGH assessed the expected performance of the structures in a maximum design earthquake when the reservoir water level is at its maximum level under normal operating conditions. Highlights of our work include the following:

  • Developed finite element models of the reinforced concrete control structure and steel radial arm tainter gates
  • Evaluated the control structure for uncracked and cracked conditions
  • Analyzed the gates for both downstream and cross-steam loading
  • Compared the anticipated demands to the structures’ capacities
  • Concluded a maximum design earthquake should not cause deformations or damage that would prevent the gates from opening

Project Summary



Completion Date
Repair & Rehabilitation
Structures | Advanced Analysis | Performance & Code Consulting
Infrastructure & Transportation
Sage Engineers, Inc.
Specialized Capabilities
Marine & Civil Works | Roofing & Waterproofing | Computational Mechanics

Key team members

Philip Hashimoto
Philip Hashimoto
Senior Principal