Theresa A. Fregoso Amy C. Foxgrover Bruce E. Jaffe 20250723 comma-delimited text data release DOI:10.5066/P9Y7W1ZM Pacific Coastal and Marine Science Center, Santa Cruz, California U.S. Geological Survey https://doi.org/10.5066/P9Y7W1ZM Theresa A. Fregoso Amy C. Foxgrover Bethany Kharrazi Bruce E. Jaffe 2025 Data Release DOI:10.5066/P9Y7W1ZM Pacific Coastal and Marine Science Center, Santa Cruz, CA U.S. Geological Survey Suggested Citation: Fregoso, T.A., Foxgrover, A.C., Kharrazi, B., and Jaffe, B.E., 2025, Estimates of percent sand in cores collected in San Francisco Bay, California: U.S. Geological Survey data release, https://doi.org/10.5066/P9Y7W1ZM. https://doi.org/10.5066/P9Y7W1ZM Percentage of sand content provided in 10 cm intervals down the length of 186 sediment cores collected in San Francisco Bay, California in 1990-91, 2000, 2006, and 2016. Sediment data were obtained from a combination of gravity, box, and push cores ranging in length from 14 to 360 cm. Sand content percentages were obtained from a compilation of visual analyses, descriptive and graphical core logs, and grain size measurements. For the purposes of modeling variability in sand content with depth beneath the San Francisco Bay floor, percent sand content values were converted from variable layer thicknesses based upon natural breaks within the core, to regularly spaced 10-cm intervals using a weighted average. The sediment core data presented here were compiled for use in a project studying the amount of sand either released from or stored within the bed sediments of San Francisco Bay, California from the 1980s to 2010s. Estimates of the change in sand storage in the bed sediments could be used in larger San Francisco Bay sand budget and transports studies as well as to inform management decisions regarding activities such as dredging and sand mining. This study was funded by the California Coastal Conservancy, and the U.S. Geological Survey Coastal and Marine Hazards and Resources Program. Additional information about the field activity or activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=J190SF https://cmgds.marine.usgs.gov/fan_info.php?fan=J191SF https://cmgds.marine.usgs.gov/fan_info.php?fan=J200SF https://cmgds.marine.usgs.gov/fan_info.php?fan=2016-671-FA Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology. 19900120 20161021 publication date Complete None planned -122.507046 -121.863877 38.133552 37.448070 USGS Metadata Identifier USGS:31fa34eb-4d2d-4cca-a66f-1b60a2e9b166 ISO 19115 Topic Category environment inlandWaters Data Categories for Marine Planning Mining and Mineral Extraction Bathymetry and Elevation USGS Thesaurus ocean processes sedimentation ocean sciences mining and quarrying bathymetry dredging drilling and coring box coring gravity coring sediment transport estuarine processes stratigraphic thickness suspended material (water) Marine Realms Information Bank (MRIB) keywords sand deposit sediment coastal sediment budget dredge spoils disposal box coring surface sampling grab sampling sediment analysis sediment deposition sediment erosion sediment resources sediment sinks sediment sources analytical modeling conceptual modeling None U.S. Geological Survey USGS Coastal and Marine Hazards and Resources Program CMHRP Pacific Coastal and Marine Science Center PCMSC Geographic Names Information System (GNIS) San Francisco Bay San Pablo Bay Suisun Bay Carquinez Strait Golden Gate Pacific Ocean Alcatraz Island No access constraints USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey. This information is not intended for navigation purposes. U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov SFBayCoreLocations.png Map depicting the location and source of cores included in this study PNG Microsoft Windows 10 Version 10.0 (Build 19045); Microsoft Excel 2302 Build 16130.20766; Esri ArcGIS 13.1.3.41833 Theresa A. Fregoso Bruce E. Jaffe Amy C. Foxgrover Donald Woodrow Bethany Kharrazi Kevin Orzech 2025 Fregoso, T.A., Jaffe, B.E., Foxgrover, A.C., Woodrow, D.L., Kharrazi, B., and Orzech, K., 2025, Contributions of erosion, deposition, and human activities to a change in sand storage in the bed of San Francisco Bay, California, 1980s to 2010s: U.S. Geological Survey Open-File Report 2025–1022, 30 p., https://doi.org/10.3133/ofr20251022. http://doi.org/10.3133/ofr20251022 Donald Yee Bryan Bemis Douglas Hammond Wes Heim Bruce E. Jaffe Anthony Rattonetti Saskia. van Bergen 2011 Yee, D., B. Bemis, D. Hammond, W. Heim, B. Jaffe, A. Rattonetti, S. van Bergen. 2011. Age Estimates and Pollutant Concentrations of Sediment Cores from San Francisco Bay and Wetlands. A Technical Report of the Regional Monitoring Program: SFEI Contribution 652. San Francisco Estuary Institute, Oakland, CA. 45pp + Appendices A, B and C. https://www.sfei.org/sites/default/files/biblio_files/652-Coring-2006-Yee-report-Final-web.pdf While every effort was made to be precise in measurements, quality of preservation of individual cores, determined recorded sediment intervals in core logs. Estimating the percent sand in cores from handwritten core logs is, fundamentally, subjective. Users are advised to read the companion open-file report accompanying this data release for additional information. Attributes mean the same thing throughout the dataset. There are additional sediment cores and core logs that were not included in this data release for several possible reasons: (1) the core was outside of this project study area, (2) the core data have been released as part of another study, or 3) the original core could not be located for analysis. Data are as accurate as source data used. Users are advised to read the metadata record for the sources for horizontal accuracy details. No further accuracy tests were conducted. Data are as accurate as source data used. Users are advised to read the metadata record for the sources for horizontal accuracy details. No further accuracy tests were conducted. Theresa A. Fregoso Bethany Kharrazi Bruce E. Jaffe 2025 Table online U.S. Geological Survey https://doi.org/10.5066/P9Y7W1ZM online database 19900120 20161021 ground condition Cores Core information used in dataset from this same data release. For each core, percent sand data were derived from a combination of visual and graphical core logs and grain-size analyses and entered into an excel spreadsheet. If the top of the cores had gaps between the top of the core liner and the beginning of the actual sediment core, the distance of the gap was subtracted from the raw depth intervals to vertically adjust the zero (0) value to the bed surface. Variations in sand content with depth were interpolated to regularly spaced 10 cm intervals using a weighted average and data from all 186 cores were compiled, along with x, y coordinate locations, collection year, and source information into a single spreadsheet. Cores 2023 Point Point 186 0.00001 0.00001 Decimal degrees World Geodetic System 1984 (WGS84) WGS84 6378137.0 298.257223563 SanFranciscoBayPerSand10cmCores Table of sand percent values of a core by 10 cm intervals Producer Defined Core_ID The core ID producer defined For A/C cores, the core IDs begin with of the last two numbers of the year collected, followed by a dash and sequential numbers assigned on day of collection. For Jaffe cores, cores begin with BC for box cores, or GC or GCC for gravity cores, followed by a dash and sequential numbers assigned on day of collection. Watt cores begin with SPB followed by sequential numbers assigned on day of collection. Yee cores begin with initials representing subembayment (SB – south bay, LSB – lower south bay, SU – Suisun, CB – Central Bay, SPB – San Pablo Bay), followed either by sequential numbers assigned on day of collection or more descriptive place name. Bay Subembayment where core is located producer defined Suisun Subembayment Producer defined San Pablo Subembayment Producer defined Central Subembayment Producer defined South Subembayment Producer defined Lower South Subembayment Producer defined Source The principal investigator leading the core collection project. These values correspond to the Survey attribute in SanFranciscoCoreSedimentAnalysis.csv(from this same data release) producer defined A/C Survey Identifier for Anima/Clifton, J190SF and J191SF Producer Defined Jaffe Survey Identifier for J200SF Producer Defined Watt Survey Identifier for 2016-671-FA Producer Defined Yee Survey Identifier for Yee 2011 Producer Defined year Year core collected producer defined 1990 2016 years Longitude longitude WGS84 producer defined -122.47317 -122.03090 degree Latitude latitude WGS84 producer defined 37.45950 38.10355 degree XUTM X UTM NAD83 zone 10 north. producer defined 546303.6 585012.3 meters YUTM y UTM NAD83 zone 10 north. producer defined 4146268.7 4217483.7 meters Sand presence of sand in core producer defined Y Yes sand presence Producer Defined N No sand presence Producer Defined length length of core producer defined 14 360 cm Fn0-10 Sand content of the 0-10 cm interval from top of core (0), down producer defined 0.0000 0.9808 percentage in decimal form Fn10-20 Sand content of the 10-20 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9808 percentage in decimal form Fn20-30 Sand content of the 20-30 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9808 percentage in decimal form Fn30-40 Sand content of the 30-40 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9808 percentage in decimal form Fn40-50 Sand content of the 40-50 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9808 percentage in decimal form Fn50-60 Sand content of the 50-60 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.8448 percentage in decimal form Fn60-70 Sand content of the 60-70 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 1.0000 percentage in decimal form Fn70-80 Sand content of the 70-80 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 1.0000 percentage in decimal form Fn80-90 Sand content of the 80-90 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 1.0000 percentage in decimal form Fn90-100 Sand content of the 90-100 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9500 percentage in decimal form Fn100-110 Sand content of the 100-110 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9500 percentage in decimal form Fn110-120 Sand content of the 110-120 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9850 percentage in decimal form Fn120-130 Sand content of the 120-130 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.9500 percentage in decimal form Fn130-140 Sand content of the 130-140 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7705 percentage in decimal form Fn140-150 Sand content of the 140-150 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 1.0000 percentage in decimal form Fn150-160 Sand content of the 150-160 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.6694 percentage in decimal form Fn160-170 Sand content of the 160-170 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.8568 percentage in decimal form Fn170-180 Sand content of the 170-180 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.8568 percentage in decimal form Fn180-190 Sand content of the 180-190 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.8568 percentage in decimal form Fn190-200 Sand content of the 190-200 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7000 percentage in decimal form Fn200-210 Sand content of the 200-210 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.8000 percentage in decimal form Fn210-220 Sand content of the 210-220 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7143 percentage in decimal form Fn220-230 Sand content of the 220-230 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.5258 percentage in decimal form Fn230-240 Sand content of the 230-240 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7000 percentage in decimal form Fn240-250 Sand content of the 240-250 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7000 percentage in decimal form Fn250-260 Sand content of the 250-260 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7000 percentage in decimal form Fn260-270 Sand content of the 260-270 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7000 percentage in decimal form Fn270-280 Sand content of the 270-280 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7000 percentage in decimal form Fn280-290 Sand content of the 280-290 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.7900 percentage in decimal form Fn290-300 Sand content of the 290-300 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.5000 percentage in decimal form Fn300-310 Sand content of the 300-310 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.5300 percentage in decimal form Fn310-320 Sand content of the 310-320 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.5000 percentage in decimal form Fn320-330 Sand content of the 320-330 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.6000 percentage in decimal form Fn330-340 Sand content of the 330-340 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.6000 percentage in decimal form Fn340-350 Sand content of the 340-350 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.5000 percentage in decimal form Fn350-360 Sand content of the 350-360 cm interval from top of core (0), down, -9999 no data value producer defined 0.0000 0.5000 percentage in decimal form The first line of the csv file is a header line. U.S. Geological Survey U.S. Geological Survey - CMGDS mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov These data are available in csv format accompanied by CSDGM FGDC-compliant metadata. Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. comma-delimited text Microsoft Excel 2302 Build 16130.20766 Zip file contains the csv table and the associated metadata. No compression applied 0.0729 https://doi.org/10.5066/P913V4S1 Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Environmental Data section. None. These data can be viewed with any spreadsheet or word processing software capable of opening CSV files. 20250723 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

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Santa Cruz CA 95060 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998