1. U.S. Department of the Interior U.S. Geological Survey Bathymetric & Bird Surveys Ponds 9 & 10, Wash Ponds, and Napa Plant Site U.S. Geological Survey

2. Acknowledgements  USGS Western Ecological Research Center  USGS Priority Ecosystem Studies, SF Bay Program  California Department of Fish and Game – Karen Taylor, Tom Huffman, Mike Sipes, Larry Wyckoff, Stacy Martinelli  Wildlife Conservation Board - Bonnie Turner, Tony Chappelle  Ducks Unlimited – Renee Spenst, Steve Carroll, Austin Payne, Russell Lowgren, Fritz Reid, Ron Galindo  State Coastal Conservancy – Amy Hutzel, Nadine Hitchcock, Betsy Wilson  SF Bay Joint Venture - Beth Huning, Christina Sloop  GAIA Consulting, Inc. - Susanne von Rosenberg  Cargil Salt - Butch Paredes  Bathy / Bird Field Support - Joel Shinn, Tanya Graham, Erin Flynn, Chris Potter, Laura Hollander, and Jeff Leichty

3. Bathymetric Survey Overview  Goal: Collect baseline elevation data for Napa Plant Site, Wash ponds, & Ponds 9&10  With future surveys we can document geomorphological changes that have occurred since restoration of tidal flow

4. Bathymetry Survey Methods Pelican Case with Navisound RTK Antenna Console with laptop & RTK Transducer

5. Bathymetry Survey Methods  100m transects Ponds 9 & 10 Wash Ponds

6. Bathymetry Survey Methods  200m transects

7. Ponds 9 & 10 ~ Current Elevation  Mean elevation: 0.71 ± 0.40m (mean ± SE)  Elevation Range: - 1.86 to 1.55m

8. Wash Ponds ~ Current Elevation  Mean elevation: 1.06 ± 0.26m  Elevation Range: - 0.46 to 1.66m

9. NPS ~ Current Elevation  Mean elevation: 0.84 ± 0.31m  Elevation Range: -2.56 to 1.65m

10. Low Tide Bird Surveys

11. Low Tide Bird Surveys – Small Shorebirds Pond 910 BreachCRYST breachWASH Breach

12. Low Tide Bird Surveys – Medium Shorebirds Pond 910 BreachCRYST breachWASH Breach

13. Low Tide Bird Surveys – Ducks Pond 910 Breach CRYST breachWASH Breach Dabbling DucksDiving Ducks CRYST breach Pond 910 Breach WASH Breach

14. Low Tide - Crystallizers

15. Low Tide – WASH ponds

16. High Tide Bird Surveys – Shorebirds Small ShorebirdsMedium Shorebirds

17. High Tide Bird Surveys – Ducks Diving DucksDabbling Ducks

18. Questions?