CPOD Hearing Highlights – April 17, 2025

The State Water Resources Control Board continues its hearing for the Petition for a Change in Point Diversion (CPOD). Today the Department of Water Resources continued to present its case in chief with Panel 2 regarding topics such as water quality, water levels, flow reversals, end of September reservoir storage, water supply, and groundwater.

Ellen Preece presented on potential water quality impacts. Amerdeep Singh presented on the subset of potential impacts that include water supply, flow reversals, and water supply. Tyler Hatch shared his findings on potential groundwater impacts.

Key Takeaways from Panel 2-Ellen Preece

Hearing Highlights

Documents & Resources

  • There would be no substantial impacts to water quality from operation of the Delta Conveyance Project.  
  • The project would not substantially cause water quality degradation to Electrical Conductivity (EC).
  • The project would not substantially cause water quality degradation due to chloride.
  • DCP operations would not substantially increase the frequency and magnitude of Cyanobacteria Harmful Algal Blooms (CHABs).

Key Takeaways from Panel 2 – Amardeep Singh

  • Since operations would be greatest when flows are highest and descend as the Sacramento River level goes down, there are no water supply impacts.
  • Operations will not increase the frequency or magnitude of reverse flow events.
  • Operations will not decrease water supply for Central Valley Project contractors and will increase water supply for State Water Project Table A contractors by 22 percent over 2020—essentially keeping overall supplies on par after accounting for future losses caused by climate change.

Key Takeaways from Panel 2-Tyler Hatch

  • DCP construction activities will not impact legal water users. Even so, the Project will monitor to ensure there are no construction impacts and has identified mitigation measures in case they are needed.
  • The “no impact” conclusion results from no significant changes in
    • stream gains or losses,
    • groundwater elevations,
    • reduction in groundwater levels affecting supply wells,
    • long term change in groundwater storage,
    • increases in groundwater elevation near the DCP intakes that will impact agricultural drainage,
    • subsidence, or
    • groundwater quality degradation.

Expert Witness Biographies:

Ellen Preece is an Environmental Program Manager for the Department of Water Resources. She is the lead author of Sacramento-San Joaquin Delta (Delta) Harmful Algal Bloom Monitoring Strategy and the CHAB expert for Delta Conveyance Project. She also developed and lead Cyanobacteria Harmful Algal Bloom (CHAB) research projects in the Delta, including researching cyanobacteria dynamics in CHAB hotspots and CHAB transport across the Delta using a variety of genetic and modeling tools.

  • B.S. Environmental and Resource Economics, University of New Hampshire, Durham, NH
  • M.S. Environmental and Natural Resource Sciences, Limnology, Washington State University, Pullman, WA
  • Ph.D, Environmental and Natural Resource Sciences, Limnology, Washington State University, Pullman, WA

Amerdeep Singh is a principal engineer with the Department of Water Resources, Delta Conveyance Office since 2019. He served as modeling manager for the Delta Conveyance Project Environmental Impact Report. Mr. Singh led a multi-disciplinary group composed of DWR staff and consultants to perform modeling analyses for Environmental Impact Report, and related environmental documentation. He used his extensive engineering knowledge and expertise to plan and coordinate the development of water planning and operations models for the Delta Conveyance Project (DCP).

  • B.S. Agricultural Engineering, Indian Institute of Technology (IIT), Kharagpur, India
  • M.S. Civil Engineering, California State University, Sacramento
  • Professional Engineering License (Civil), Number 64048

Tyler Hatch is a Principal Engineer with INTERA Incorporated since 2023. And the prior three years he was the Supervising Engineer for Department of Water Resources, Sustainable Groundwater Management Office, as part of the modeling and tools support section.

  • B.S. Civil Engineering, California Polytechnic State University, San Luis Obispo, California
  • M.S. Civil and Environmental Engineering, University of California, Davis, California
  • Ph.D. Civil and Environmental Engineering, University of California, Davis, California
  • Professional Civil Engineer, License Number: C82411.

Thomas FitzHugh is a Principal Water Resources Scientist at Stantec

  • B.A. Government, Lawrence University, Appleton, Wisconsin, 1987
  • M.S. Environmental Monitoring (GIS and Remote Sensing), University of Wisconsin, Madison, Wisconsin, USA, 1999
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Resources

  • Resource Explainer Video, Chapter 9 of Draft Environmental Impact Report