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Iowa Hill Pumped-Storage Development: Cost Uncertainty Reduction and Geotechnical Assessment

The Iowa Hill Pumped-Storage Development aims to minimize uncertainties in the cost and scheduling of pumped-storage projects. This initiative focuses on quantifying the value of Iowa Hill compared to conventional gas units, especially in light of increasing variable renewable generation. Objectives include identifying geotechnical defects, assessing subsurface conditions, and determining necessary service requirements. The project seeks to enhance energy sourcing for on-peak demand and ancillary services, contributing to both SMUD and regional energy stability in California.

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Iowa Hill Pumped-Storage Development: Cost Uncertainty Reduction and Geotechnical Assessment

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  1. Water Power Peer Review Sacramento Municipal Utility District Iowa Hill Pumped-storage Development Water Power 2010 Sustainable Pumped-storage PI: Scott Flake P.E. Sacramento Municipal Utility District E-mail: sflake@smud.org (916) 732-6174 November 2011 Sacramento Municipal Utility District Iowa Hill Pumped-storage Development

  2. Purpose, Objectives, & Integration Project Purpose: • Demonstrate methods to reduce uncertainty in cost and schedule development of Pumped-storage Projects. • Define and quantify the value streams of Iowa Hill relative to conventional gas units with future anticipated higher levels of variable renewable generation. Relation to Program Objectives: • Identify geotechnical defects in the subsurface that could result in costly remedial measures. • Determine depth of the weathered zone, landslides, and toppled rock in construction area. • Develop detailed information through the powerhouse gallery, tunnels, and shafts on minimum in-situ stresses to inform the degree of steel lining needed. • Determine ancillary service requirements to balance increased variable renewable generation. • Examine value from pumped storage relative to conventional gas generation for providing on peak energy and ancillary services in the SMUD Balancing Authority, and as part of the entire California region.

  3. Visual Simulation of Iowa Hill Pumped-storage Development

  4. Plan View of Proposed Geotechnical Exploration Tsunami test

  5. Plan and Budget

  6. Schedule

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