20251030 13163000 1.0 FGDC CSDGM Metadata FALSE i08_B118_CA_GroundwaterBasins_1 -370433.732500 531842.579400 -604517.858300 444543.822900 1 002 Projected GCS_WGS_1984 Linear Unit: Meter (1.000000) WGS_1984_Web_Mercator_Auxiliary_Sphere <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.5.0'><WKT>PROJCS[&quot;WGS_1984_Web_Mercator_Auxiliary_Sphere&quot;,GEOGCS[&quot;GCS_WGS_1984&quot;,DATUM[&quot;D_WGS_1984&quot;,SPHEROID[&quot;WGS_1984&quot;,6378137.0,298.257223563]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Mercator_Auxiliary_Sphere&quot;],PARAMETER[&quot;False_Easting&quot;,0.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,0.0],PARAMETER[&quot;Standard_Parallel_1&quot;,0.0],PARAMETER[&quot;Auxiliary_Sphere_Type&quot;,0.0],UNIT[&quot;Meter&quot;,1.0],AUTHORITY[&quot;EPSG&quot;,3857]]</WKT><XOrigin>-20037700</XOrigin><YOrigin>-30241100</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102100</WKID><LatestWKID>3857</LatestWKID></ProjectedCoordinateSystem> 20251030 13321300 20251030 13321300 FGDC 150000000 5000 20251030 ArcGIS Metadata 1.0 California Department of Water Resources (916) 653-5791 P.O. Box 942836 Sacramento CA 94236-0001 http://water.ca.gov/canav/comment.cfm none File Geodatabase Feature Class 5.0; 20160930 4.5 https://data.cnra.ca.gov/dataset/i08-b118-ca-groundwaterbasins1 Enterprise Geodatabase Feature Class i08_B118_CA_GroundwaterBasins 2025-10-28T00:00:00 6.4 Department of Water Resources vector digital data DWR Data Disclaimer: This dataset was developed by the State of California, Department of Water Resources, for uses beneficial to the State. The information is available upon request to interested members of the public. While the Department believes the information to be reliable and made efforts to assure its reliability at the time the information was compiled, the information is provided "as is". The Department is not responsible for the accuracy, completeness, quality or legal sufficiency of the information. Any expressed or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for purpose ARE SPECIFICALLY DISCLAIMED. Neither the Department nor the State of California shall be held liable for any direct, indirect, incidental, special, exemplary or consequential damages (including, but not limited to: procurement of substitute goods or services; loss of use, data or profits; or business interruption), however caused and on any theory of liability, whether in contract, strict liability or tort, arising in any way out of the use of this information. This disclaimer applies to use of the information alone and to its aggregate use with other information, data or programs. The information contained in each of the basin descriptions at this site was obtained from information on file in the offices of the Department of Water Resources and limited additional information. Recent studies may contain additional, more up-to-date information. To obtain the most up-to-date information about the basin you are interested in, please contact the local management agency listed near the end of the basin description. The State of California and the Department of Water Resources hereby specifically retain any intellectual property interest, including copyright, that they may hold in the information provided, whether the information is in the form of data, files, text images, photography or maps. The Department requests that persons receiving and using this information not make it available to others for their re-use. Instead, interested third parties should be encouraged to contact the Department for copies, in order to ensure that the information is obtained from the source that developed it, that can provide the greatest degree of reliability. Christina Boggs-Chavira California Department of Water Resources Senior Engineering Geologist P.O. Box 942836 Sacramento CA 94236-0001 christina.boggs@water.ca.gov 916-384-6061 <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The dataset is a feature class showing the boundaries of 515 groundwater basins and subbasins as defined by the California Department of Water Resources as last modified by the Basin Boundary Emergency Regulation adopted on October 21, 2015 and subsequent modifications requested through the Basin Boundary Modification Request Process. This data is current as of October 13, 2025. The file is in ESRI geodatabase format and is intended for use with compatible GIS software. Groundwater basins are represented as polygon features and designated on the basis of geological and hydrological conditions - usually the occurrence of alluvial or unconsolidated deposits. When practical, large basins are also subdivided by political boundaries, as in the Central Valley. Basins are named and numbered per the convention of the Department of Water Resources. </SPAN></P></DIV></DIV></DIV> Bulletin 118 defines the recognized groundwater basins and subbasins throughout the State of California. The Bulletin 118 document provides information on these basins/subbasins and the nature and extent of groundwater occurrence and management within the State. The Bulletin 118 dataset makes the geographic locations and extent of the 515 basins/subbasins publicly available, for use in external mapping/GIS applications. The associated data are considered DWR enterprise GIS data, which meet all appropriate requirements of the DWR GIS Spatial Data Standards version 3.6, dated September 27, 2023. DWR makes no warranties or guarantees, either expressed or implied, as to the completeness, accuracy or correctness of the data, nor accepts or assumes any liability arising from or for any incorrect, incomplete or misleading subject data. The official DWR GIS Data Steward for this dataset is Christina Boggs-Chavira, who may be contacted at 916-384-6061, or at christina.boggs@water.ca.gov. Comments, problems, improvements, updates, or suggestions should be forwarded to the official GIS Data Steward as available and appropriate. https://d3.water.ca.gov/owncloud/index.php/s/y9yxxGC6BqsXPdS A series of blue polygons depicting groundwater basins. JPEG B-118 Dept. of Water Resources geology California subbasin DWR Department of Water Resources groundwater aquifers aquifer Bulletin 118 hydrogeology ground water basin B118 sub-basin sub basin basin Dept. of Water Resources hydrogeology California ground water subbasin DWR sub-basin Bulletin 118 B-118 groundwater geology B118 sub basin aquifers aquifer Department of Water Resources ISO 19115 Topic Category boundaries geoscientificInformation Department of Water Resources sub-basin sub basin Dept. of Water Resources geology California DWR boundaries subbasin B-118 ground water aquifers aquifer Bulletin 118 hydrogeology groundwater B118 basin boundaries geoscientific Information Department of Water Resources sub basin California boundaries hydrogeology B-118 subbasin DWR groundwater aquifers aquifer Bulletin 118 hydrogeology sub-basin basin Dept. of Water Resources groundwater geology B118 DWR GIS Atlas <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN>The original source projection of the DWR GIS atlas dataset was California Teale Albers, NAD83. For copies of data in original projection, please contact DWR directly.</SPAN></P><P><SPAN>DWR Data Disclaimer: This dataset was developed by the State of California, Department of Water Resources, for uses beneficial to the State. The information is available upon request to interested members of the public. While the Department believes the information to be reliable and made efforts to assure its reliability at the time the information was compiled, the information is provided "as is". The Department is not responsible for the accuracy, completeness, quality or legal sufficiency of the information. Any expressed or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for purpose ARE SPECIFICALLY DISCLAIMED. Neither the Department nor the State of California shall be held liable for any direct, indirect, incidental, special, exemplary or consequential damages (including, but not limited to: procurement of substitute goods or services; loss of use, data or profits; or business interruption), however caused and on any theory of liability, whether in contract, strict liability or tort, arising in any way out of the use of this information. This disclaimer applies to use of the information alone and to its aggregate use with other information, data or programs. The information contained in each of the basin descriptions at this site was obtained from information on file in the offices of the Department of Water Resources and limited additional information. Recent studies may contain additional, more up-to-date information. To obtain the most up-to-date information about the basin you are interested in, please contact the local management agency listed near the end of the basin description. The State of California and the Department of Water Resources hereby specifically retain any intellectual property interest, including copyright, that they may hold in the information provided, whether the information is in the form of data, files, text images, photography or maps. The Department requests that persons receiving and using this information not make it available to others for their re-use. Instead, interested third parties should be encouraged to contact the Department for copies, in order to ensure that the information is obtained from the source that developed it, that can provide the greatest degree of reliability. Caution: It is possible to plot part or the entire map at a scale that exceeds the 1:250,000 resolution of the map. However, the groundwater basin data can be no more accurate than the 1:250,000 resolution base map on which it was plotted.</SPAN></P></DIV></DIV></DIV> DWR Data Disclaimer: This dataset was developed by the State of California, Department of Water Resources, for uses beneficial to the State. The information is available upon request to interested members of the public. While the Department believes the information to be reliable and made efforts to assure its reliability at the time the information was compiled, the information is provided "as is". The Department is not responsible for the accuracy, completeness, quality or legal sufficiency of the information. Any expressed or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for purpose ARE SPECIFICALLY DISCLAIMED. Neither the Department nor the State of California shall be held liable for any direct, indirect, incidental, special, exemplary or consequential damages (including, but not limited to: procurement of substitute goods or services; loss of use, data or profits; or business interruption), however caused and on any theory of liability, whether in contract, strict liability or tort, arising in any way out of the use of this information. This disclaimer applies to use of the information alone and to its aggregate use with other information, data or programs. The information contained in each of the basin descriptions at this site was obtained from information on file in the offices of the Department of Water Resources and limited additional information. Recent studies may contain additional, more up-to-date information. To obtain the most up-to-date information about the basin you are interested in, please contact the local management agency listed near the end of the basin description. The State of California and the Department of Water Resources hereby specifically retain any intellectual property interest, including copyright, that they may hold in the information provided, whether the information is in the form of data, files, text images, photography or maps. The Department requests that persons receiving and using this information not make it available to others for their re-use. Instead, interested third parties should be encouraged to contact the Department for copies, in order to ensure that the information is obtained from the source that developed it, that can provide the greatest degree of reliability. none This is unclassified, publicly available data. Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 true -124.4603 -113.6012 42.0191 32.4280 publication date 2021-12-06 Origination of Data - The basin boundaries for the groundwater basin map were primarily defined using geologic contacts and hydrogeologic divides. Specifically, the identification of the groundwater basins was initially based on the presence and areal extent of unconsolidated alluvial soils identified on 1:250,000 scale geologic maps provided by the California Department of Conservation, Division of Mines and Geology. The identified groundwater basin areas were then further evaluated through review of relevant geologic and hydrogeologic reports, well completion reports, court-determined adjudicated basin boundaries, and contact with local agencies to refine the basin boundaries. The 6.2 version of DWR’s Bulletin 118 dataset is available at: https://data.cnra.ca.gov/dataset/ca-bulletin-118-groundwater-basins1. The current dataset was updated at the time the latest Bulletin 118 document was produced, and is based on geological maps and other information available at that time. There have been minor corrections to the dataset since that time, as described in the data lineage. Additional Contacts - Contacts Statewide Data Steward: Christina Boggs-Chavira Senior Engineering Geologist California Department of Water Resources Sustainable Groundwater Management Office (916) 384-6061 Christina.Boggs@water.ca.gov Region Office Data Sub-stewards: Northern Region Office Michelle Dooley Supervising Engineering Geologist (530) 945-0882 Michelle.Dooley@water.ca.gov North-Central Region Office Bill Brewster Senior Engineering Geologist (916) 820-8107 Bill.Brewster@water.ca.gov South-Central Region Office Dane Mathis Supervising Engineering Geologist (916) 820-7773 Dane.Mathis@water.ca.gov Southern Region Office Jack Tung, Senior Engineering Geologist, (818) 540-8693 jack.tung@water.ca.gov Update Frequency: Changes to the dataset are made on an infrequent and irregular basis. Minor changes are occasionally made and will be documented in the metadata. Substantial changes, such as the extent of a basin boundary, must be completed as part of a public process, where the changes are proposed and public review and comment are welcomed before any changes are finalized. 1 -124.460304 -113.601215 42.019077 32.428022 California Department of Water Resources Christina Boggs-Chavira California Department of Water Resources Senior Engineering Geologist P.O. Box 942836 Sacramento CA 94236-0001 christina.boggs@water.ca.gov 916-384-6061 Christina Boggs-Chavira Of 515 Features: All have Basin_Number, Basin_Subbasin_Number, Basin_Name, Basin_Subbasin_Name, Region_Office, Area_Acres, and Area_SqMiles populated. Date_Record_Last_Edited, Record_Edited_By and Comments have some <null> values present by design. Internal review of attributes. No contradictions currently appear. Internal review of consistency. Dataset appears to have all features. Due to the nature of the subject matter, edge to edge coverage of California does not exist. Internal review of completeness. Locational Quality: Locational quality is not applicable to this dataset. This report is not being made by a licensed land surveyor, and is not analogous to a positional accuracy statement as stipulated in the California Public Resources Code. Pursuant to Water Code 10722 and 23 California Code of Regulations 340.4 “a basin’s boundaries shall be as identified in Bulletin 118.” Locational Quality: Locational quality is not applicable to this dataset. This report is not being made by a licensed land surveyor, and is not analogous to a positional accuracy statement as stipulated in the California Public Resources Code. Pursuant to Water Code 10722 and 23 California Code of Regulations 340.4 “a basin’s boundaries shall be as identified in Bulletin 118.” Metadata Update - December 09, 2010 B118_v3_BasinBoundaries_NAD83_unprojected file was developed from B118v3NAD27UTM10 (dated 15-September-2006) which had a UTM 10 NAD 27 projection. The new file projection is defined as Latitude/Longitude NAD 83 and was converted using ESRI's Project tool in a two step process. Set one changed the Datum from NAD27 to NAD 83. The second step was to re-project the file from Universal Transverse Mercator 10 to Lat/Long Geographic projection for the use of CASGEM. 2010-12-09 Brett Wyckoff (916) 651-9283 901 P Street, Room 213B Sacramento CA 95814 brett.wyckoff@water.ca.gov Metadata Update – June 20, 2012 The shapefile B118_BasinBoundaries_v4_1.shp replaces B118_v3_BasinBoundaries_NAD83_unprojected.shp. Changes in the update include restoration of the northern portion of the North Yuba subbasin which was inadvertently removed during the 2003 B-118 Update. Also, the DWR District field (DWR_DIST) in the feature attribute table has been replaced by Regional Office Field (Regional_O). Basin boundary features in previous versions that were comprised of multiple polygons are now represented by single multi-part polygons. 2014-06-20 Brett Wyckoff (916) 651-9283 901 P Street, Room 213B Sacramento CA 95814 Brett.Wyckoff@water.ca.gov In an effort to realign locations of groundwater basins and subbasins, a process was set up to review the boundaries of all groundwater basins and subbasins to ensure they were aligned with the most current geologic boundaries. This process step was undertaken to review and correct some of the errors related to geologic boundaries. We reviewed each basin written description to provide a list of which basin boundaries referred to a geologic boundary and subsequently needed to have their geologic boundary portions reviewed. Once we had a list of the basins that needed review, we reviewed them with the using the California Geologic Survey maps of 1:250,000 scale (Regional Geoloci Map Series and The Geologic Atlas of California), and when readily available at other larger scale (more detailed) published geologic maps to ensure accurate coincidence of boundaries. For this review, High and Medium Priority basins with discrepancies between the linework and written description were sorted as having “significant”, “major”, or “minor” geologic issues. DWR has made adjustments to basin boundaries having a significant geologic issue, and an unambiguous written description. These realignments are not an adjustment to the written text contained within the Bulletin 118 but an attempt to better capture geographically the written descriptions. 2015-01-01 Erin Smith DWR 530-529-7314 2440 Main Street Red Bluff California 96080 Erin.Smith@water.ca.gov In an effort to realign locations of groundwater basins and subbasins, a process was set up to review the boundaries of all groundwater basins and subbasins to ensure they were aligned with the most current county boundaries. In the initial creation of the B118 dataset, there were some errors introduced with the use of county lines. This process step was undertaken to correct these errors. We reviewed each basin written description to provide a list of which basin boundaries needed to have their county line portions reviewed. Once we had a list of the basins that needed review, we reviewed them with the using the CalFire Counties dataset to ensure accurate coincidence of boundaries. These realignments are not an adjustment to the written text contained within the Bulletin 118 but an attempt to better capture geographically the written descriptions. 2015-06-01 Siran Erysian DWR 559-230-3312 3374 E. Shields Ave, Rm. A-1 Fresno CA 93726 Siran.Erysian@water.ca.gov In an effort to realign locations of groundwater basins and subbasins, a process was set up to review the boundaries of all groundwater basins and subbasins to ensure they were aligned with the most current stream boundaries. In the initial creation of the B118 dataset, there were some errors introduced with the use of stream and rivers as a boundary. This process step was undertaken to correct these errors. We reviewed each basin written description to provide a list of which basin boundaries referred to a stream or river and subsequently needed to have their county line portions reviewed. Once we had a list of the basins that needed review, we reviewed them using the National Hydrography Dataset’s Hydroline dataset to ensure accurate coincidence of boundaries. These realignments are not an adjustment to the written text contained within the Bulletin 118 but an attempt to better capture geographically the written descriptions. 2015-07-01 Siran Erysian DWR 559-230-3312 3374 E. Shields Ave, Rm. A-1 Fresno CA 93726 Siran.Erysian@water.ca.gov Following the adoption of DWR’s Basin Boundary Emergency Regulations, DWR provided an online Basin Boundary Assessment Tool (BBAT) to inform local agencies and the public about the existing Bulletin 118 groundwater basins and other relevant geologic and geographic data. DWR developed a Basin Boundary Modification Request System to enable local agencies to submit their requests for basin boundary modifications online, and the public to view those requests and provide comments. The draft approved basin boundary modifications were developed through DWR’s technical review of basin boundary modification requests and public comment made during the submission period, January 1, 2016 through March 31, 2016.DWR held a series of public meetings to present the Draft Approved Basin Boundary Modifications, provide an overview of the BBMRS and technical review process, answer clarifying questions and receive further public comments on the Draft Approved Basin Boundary Modification submissions. After the public meetings, the public comments were summarized and presented to the California Water Commission. Following consideration and potential incorporation of comments heard, DWR will publish the final basin boundary modifications. These basin boundary modifications were incorporated into the dataset. 2016-09-01 Tim Godwin DWR 916-651-9223 901 P Street Sacramento CA 95814 Timothy.Godwin@water.ca.gov The following edits and corrections were completed for this version (5.1): (A) Several minor typos and boundary errors were corrected by DWR, including: (1) two small erroneous polygons attributed to Santa Clara Valley East Bay Plain were removed, (2) spelling out previously abbreviated FM to FORMATION in Annapolis Ohlson Ranch Formation Highlands (3) fixed typo in Coastal Plain of Los Angeles Hollywood basin number, (4) modified the boundary of the San Joaquin Valley Westside and San Joaquin Valley Kings basins on the north and eastern edges, (5) modified the boundary of San Joaquin Valley Tulare Lake and San Joaquin Valley Tule basins east/west border, (6) modified boundary of San Joaquin Valley Merced and San Joaquin Valley Chowchilla basins, (7) modified boundary of San Joaquin Valley Merced and San Joaquin Valley Delta Mendota basins, (8) modified boundary of West Santa Cruz Terrace and Santa Cruz Mid County basins, (9) modified boundary of San Joaquin Valley Delta Mendota and San Joaquin Valley Chowchilla basins, (10) modified boundary of Kaweah and Tule basins. (B) Additionally, the schema was changed to better accommodate map labels and to better align with the groundwater elevation tracking databases within DWR. 2017-07-01 Christina Boggs-Chavira and Siran Erysian (916) 376-9623 and (559) 230-3312 respectively PO Box 94236 Sacramento California 94236 Christina.Boggs@water.ca.gov and Siran.Erysian@water.ca.gov The following edits and corrections were completed for version 5.2: Duplicate subbasin features were deleted for Kern and Tule Subbasins. 2018-03-13 Christina Boggs-Chavira 916-376-9623 PO Box 94236 Sacramento California 94236 christina.boggs@water.ca.gov The 2018 Basin Boundary Modifications period supports the updated version 6.0 of the Bulletin 118 Basin Boundaries. Local agencies and GSAs were eligible to request basin boundary modifications during the submission period, January 1, 2018 through September 28, 2018. The draft approved basin boundary modifications are represented by this dataset. Please review the Date_Record_Last_Edited for basin features edited in this round of modifications and the Basin Boundary Modification Request System online for details - https://sgma.water.ca.gov/basinmod/ 2018-12-03 Dane Mathis DWR 559-230-3354 3374 E Shields Ave Fresno California 93726 Dane.Mathis@water.ca.gov The 2018 Basin Boundary Modifications period supports the updated version 6.0.1 of the Bulletin 118 Basin Boundaries. Local agencies and GSAs were eligible to request basin boundary modifications during the submission period, January 1, 2018 through September 28, 2018. The draft approved basin boundary modifications are represented by this dataset. Please review the Date_Record_Last_Edited for basin features edited in this round of modifications and the Basin Boundary Modification Request System online for details - https://sgma.water.ca.gov/basinmod/ This microversion release includes refined linework or attribute updates specifically related to existing BBMRs draft approvals to: North American, South Yuba, San Jacinto, San Timoteo, San Diego River Valley, Madera, Butte, Kings, Sutter, Wyandotte Creek, Santa Maria, Arroyo Grande, Los Osos Area, North San Benito, Warden Creek. Additionally, this release includes the split of the San Luis Rey Valley into Upper and Lower subbasins as mandated by AB 1944 and GIS topology error corrections. 2019-01-11 Dane Mathis DWR 559-230-3354 3374 E Shields Ave Fresno California 93726 Dane.Mathis@water.ca.gov The 2018 Basin Boundary Modifications period supports the updated version 6.1 of the Bulletin 118 Basin Boundaries. Local agencies and GSAs were eligible to request basin boundary modifications during the submission period, January 1, 2018 through September 28, 2018. The final approved basin boundary modifications are represented by this dataset. Please review the Date_Record_Last_Edited for basin features edited in this round of modifications and the Basin Boundary Modification Request System online for details - https://sgma.water.ca.gov/basinmod/ This final release includes refined linework specifically related to existing BBMRs draft approvals to: Sand Point Area, Kern County, Shasta Valley, Paso Robles Area, Fillmore, Piru, Mound, and Santa Paula. Additionally, this release includes GIS topology error corrections and an error correction from the 2016 Basin Boundary Modifications period correcting a basin name from Bunker Hill to San Bernardino. 2019-02-04 Dane Mathis DWR 559-230-3354 3374 E Shields Ave Fresno California 93726 Dane.Mathis@water.ca.gov The following edits were completed for this version (6.2): Minor correction to the boundary between the Colusa and Butte subbasins and metadata. 2021-12-06T00:00:00 Tim Godwin 916-902-7813 P.O. Box 942836 Sacramento CA 94236-0001 Timothy.Godwin@water.ca.gov Version 6.3 added Area_Acres and Area_SqMiles field attributes. 2022-12-09T00:00:00 Christina Boggs-Chavira 916-902-6838 P.O. Box 942836 Sacramento CA 94236-0001 The following edits were completed for this version (6.4): Error correction to Napa/Sonoma Valley - Napa Valley boundary and metadata edits. 2025-10-28T00:00:00 Dane Mathis DWR 916-820-7773 691 N. Laverne Ave, Suite 104 Fresno California 93727 Dane.Mathis@water.ca.gov Dane Mathis 0 atlas_dev.SDE.i08_B118_CA_GroundwaterBasins Feature Class 0 GlobalID GlobalID GlobalID 38 0 0 Basin_Subbasin_Number Some, but not all, groundwater basins are split into subbasins. In cases where a groundwater basin is split into subbasins, the identifying string is represented by the Basin_Number string, followed by a decimal point, followed by two digit subbasin number (example: the Modesto Subbasin of the San Joaquin Valley Basin is 5-022.02). If a basin does not have any subbasins, it's Basin_Subbasin_Number is equal to its Basin_Number field. DWR Bulletin 118 Basin Subbasin Numbers identified in the Bulletin 118 text and in Basin Boundary Information Database (a repository of metadata) and Basin Boundary Modification Request system. This is the full Basin Number with the Subbasin number. Some, but not all, groundwater basins are slplit into subbasins. In cases where a groundwater basin is split into subbasins, the identifying string is represented by the Basin_Number string, followed by a decimal point, followed by a two digit subbasin number with leading zeros as needed (example: the Modesto Subbasin of the San Joaquin Valley Basin is 05-022.02). If a basin does not have any subbasins, it's Basin_Subbasin_Number is equal to it's Basin_Number field. Basin_Subbasin_Number String 50 0 0 Record_Edited_By The name of the staff person making edits to a record. Editor Contributed Editing should be done by steward or sub-stewards, or staff designated by them. First initial and last name. Record_Edited_By String 50 0 0 OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. OBJECTID OID 4 10 0 Basin_Number String consisting of the hydrologic region number in which the groundwater basin resides, followed by a connecting hyphen, and then a one or two digit basin number unique to that hydrologic region (example: the basin number for Mission Valley Basin is 9-14). DWR Bulletin 118 Basin numbers identified in the Bulletin 118 text and in Basin Boundary Information Database (a repository of metadata) and Basin Boundary Modification Request system. Basin_Number String 50 0 0 Basin_Name The name of a basin as defined in the Bulletin 118 text or the Boundary Modification Request. DWR Bulletin 118 Text or Basin Boundary Modification Request System The basin names identified in the Bulletin 118 text or the Basin Boundary Modification Request System. Basin_Name String 75 0 0 Basin_Subbasin_Name Groundwater basins that are divided into subbasins will have names for each subbasin. The name of a subbasin as defined in the Bulletin 118 text or the Boundary Modification Request. The Basin_Subbasin_Name is the concatenated form of Basin_Name and the subbasin name. If the basin does not have a subbasin, this field will contain only the basin name. DWR Bulletin 118 or Basin Boundary Modification Request System The basin names identified in the Bulletin 118 text or the Basin Boundary Modification Request System. Basin_Subbasin_Name String 150 0 0 Comments Any comments related to individual records and edits. Editor Contributed No restrictions, can have null. Comments String 350 0 0 Date_Record_Last_Edited The date the most recent edits to a record were completed. Editor Contributed If null, record last edited is before last publication date. Date_Record_Last_Edited Date 8 0 0 Region_Office The DWR Region Office responsible for the basin or subbasin. DWR Staff NRO - Northern Region Office, NCRO - North Central Region Office, SCRO - South Central Region Office, SRO - Southern Region Office DWR Staff Region_Office String 4 0 0 Date_Data_Applies_To If null, publication date of the comparable dataset. DWR Staff Publication date of the dataset. Date_Data_Applies_To Date 8 0 0 SHAPE Feature geometry. Esri Coordinates defining the features. SHAPE Geometry 8 0 0 Area_Acres Area of feature in acres, rounded to the nearest whole number. DWR Staff Positive real numbers that are generated from the California Teale Albers projection version area calculations. Area_Acres Integer 4 10 0 Area_SqMiles Area of feature in square miles, rounded to the nearest thousandth of a mile (0.00X). DWR Staff Positive real numbers that are generated from the California Teale Albers projection version area calculations. Area_SqMiles Double 8 38 8 SHAPE.STArea() SHAPE.STArea() Double 0 0 0 SHAPE.STLength() SHAPE.STLength() Double 0 0 0 Attributes contain detailed information about groundwater basins and subbasins. Please see the DWR Bulletin 118 for more details. dataset EPSG 6.18.3(9.3.1.2) Simple FALSE 0 TRUE FALSE Christina Boggs-Chavira California Department of Water Resources Senior Engineering Geologist P.O. Box 942836 Sacramento CA 94236-0001 christina.boggs@water.ca.gov 916-384-6061 Christina Boggs-Chavira