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Best Available Maps (BAM) represent the 100- and 200-year composite floodplains located within the Sacramento-San Joaquin Valley watershed. These maps were developed based on the best available information as required by Senate Bill 5.
Central Valley Floodplain Evaluation and Delineation Program maps represent 100- and 200-year floodplains for urban and urbanizing areas within the Sacramento-San Joaquin Valley watershed. These maps are required by Senate Bill 5. |
| summary:
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Best Available Maps (BAM) represent the 100- and 200-year composite floodplains located within the Sacramento-San Joaquin Valley watershed. These maps were developed based on the best available information as required by Senate Bill 5.
Central Valley Floodplain Evaluation and Delineation Program maps represent 100- and 200-year floodplains for urban and urbanizing areas within the Sacramento-San Joaquin Valley watershed. These maps are required by Senate Bill 5. |
| extent:
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[[-124.511649440991,32.2675538832477],[-113.497800577349,42.0688273315638]] |
| accessInformation:
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| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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Senate Bill 5 (SB 5), which was enacted in 2007, authorized the California Department of Water Resources (DWR) to develop the Best Available Maps (BAM) displaying 100- and 200-year floodplains for areas located within the Sacramento-San Joaquin (SAC-SJ) Valley waterSenate Billshed. SB 5 requires that these maps contain the best available information on flood hazards and be provided to cities and counties in the SAC-SJ Valley watershed. This effort was completed by DWR in 2008.DWR has expanded the BAM to cover all counties in the State and to include 500-year floodplains. The 100-, 200-, and 500-year floodplains are displayed on this web viewer. The web viewer allows users to view a particular area and identify their potential flood hazards. The following is a comprehensive list of the floodplains that are displayed on the web viewer and may be updated periodically. |
| licenseInfo:
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The BAM does not replace existing FEMA regulatory floodplains shown on Flood Insurance Rate Maps (FIRM). For more information on the FEMA regulatory floodplains, please contact FEMA directly. The BAM floodplains identify potential flood risks that may warrant further studies or analyses for land use decision making. The floodplains shown delineate areas with potential exposure to flooding for three different storm events: one with storm flows that have a 1% chance of being equaled or exceeded in any year (100-year), one with storm flows that have a 0.5% chance of being equaled or exceeded in any year (200-year), and one with storms flows that have a 0.2% chance of being equaled or exceeded in any year (500-year). These flows and resulting flooded area are based on the best available floodplain information and may not identify all areas subject to flooding. |
| catalogPath:
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| title:
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BAM2025 |
| type:
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Map Service |
| url:
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| tags:
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["BAM","2025"] |
| culture:
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en-US |
| portalUrl:
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| name:
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BAM2025 |
| guid:
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F1898B39-2523-4456-B25B-8E3330D4FF89 |
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0 |
| spatialReference:
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NAD_1983_California_Teale_Albers |