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A hosted feature layer is located here.UPDATE HISTORY (beginning 2015)1/5/15 - Re-organization between Torrance and Rolling Hills Estates4/22/15 - Annexation to Los Angeles from Florence-Firestone (Jordan Downs)6/9/15 - updated 'Adopted Date' for Santa Clarita Valley (wasn't done before!)6/17/15 - following the adoption of the Antelope Valley Area Plan update, the boundary between Santa Clarita Valley and AV was updated, as well as the boundary between Kagel / Lopez Canyons and Antelope Valley.8/31/15 - updated Universal City for Reorganization 2014-01.11/5/15 - updated following the General Plan 2035 going into effect. Boundary change for Kagel / Lopez Canyons, South San Gabriel / Whittier Narrows, and added boundary for Pepperdine University.3/17/16 - following an Assessor adjustment of parcel #3022012017, city boundary between Palmdale and AV was adjusted. Informed DPW as well.4/21/16 - updated San Clemente Island to match what DPW had (compared to imagery, ours was shifted). Also a re-organization between the cities of Rolling Hills Estates, Rolling Hills, and Rancho Palos Verdes. Links to both are here (document 1, document 2).11/15/16 - Updated for annexation to Santa Clarita that became effective on this day (link to official annexation document is here). Also, updates that resulted from a comprehensive city boundary update after comparison with Public Works' city boundary layer.4/19/17 - Updated for reorganization between the cities of Pomona and Diamond Bar (click here).2/5/18 - Updated for reorganization between the cities of Monrovia and Bradbury (click here).11/20/18 - Updated for RPPL 2017005805 (adopted 10/30/18) for re-alignments between the unincorporated communities of Santa Clarita Valley and Antelope Valley (for plan amendment, click here).11/21/18 - updated for Plum Canyon / Skyline Ranch / North Sand Canyon Annexation. This annexation was effective on 11/15/18, and a link to the official LAFCO annexation document is here.1/29/19 - updated for South Walnut / Pomona annexation, which was effective on 1/16/19. A link to the official LAFCO annexation document is here.5/28/19 - updated for detachment from city of Los Angeles to Del Aire. Effective 5/16/19, and a link to the official LAFCO annexation document is here.7/25/19 - updated for annexation and detachment from the city of Arcadia to South Monrovia Islands and East Pasadena-East San Gabriel, respectively. Effective 6/13/19, and a link to the official LAFCO annexation document is here.1/28/21 - updated a couple errors in the data - Date Adopted for the Florence-Firestone Community Plan, and updated Type for Walnut Park to 'NEIGH' (character length limit).1/26/22 - updated the Twin Lakes / Oat Mountain community boundary through zoning conflation project. This is to follow the updated parcels along the southern Twin Lakes border.4/12/22 - updated Gilmore Island as it was found to be 5 feet too wide on the easterly boundary. Consulted with Assessor and Public Works for confirmation.5/23/22 - updated the boundary between Twin Lakes and Oat Mountain to account for a parcel shift as identified by the Zoning Conflation project.7/28/22 - major update to all city boundaries in the entire county based on an update from Public Works. Several city boundaries were updated to follow parcels, with the majority of changes being slivers, or very minor shifts. The coastline was the major adjustment and used the latest data from NOAA.8/17/22 - boundary adjustment between Industry and North Whittier per DPW update (APN 8125021943).12/20/22 - updated for Reorganization (Tesoro Del Valle) between Santa Clarita and Santa Clarita Valley. Effective on 11/14/22.4/10/23 - fixed a slight discrepancy on APN 7351036014 in West Carson (city boundary cut through this parcel) - confirmed with DPW on this date.4/1/24 - Updated the community of View Park official name - we had as 'Ladera Heights / Viewpark - Windsor Hills' now correctly shown as 'Ladera Heights / View Park - Windsor Hills'.4/14/24 - Updated for the annexation to the City of La Verne that was effective on 3/31/24. Annexation document is here.6/20/24 - Updated with three new unincorporated communities resulting from the East San Gabriel Valley Area Plan update.12/11/24 - Updated to an annexation to the City of Whittier that was effective on 11/12/24. 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Downloaded from this website. Data current as of May 1, 2016.This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). The National Wetlands Inventory - Version 2, Surface Waters and Wetlands Inventory was derived by retaining the wetland and deepwater polygons that compose the NWI digital wetlands spatial data layer and reintroducing any linear wetland or surface water features that were orphaned from the original NWI hard copy maps by converting them to narrow polygonal features. Additionally, the data are supplemented with hydrography data, buffered to become polygonal features, as a secondary source for any single-line stream features not mapped by the NWI and to complete segmented connections. Wetland mapping conducted in WA, OR, CA, NV and ID after 2012 and most other projects mapped after 2015 were mapped to include all surface water features and are not derived data. The linear hydrography dataset used to derive Version 2 was the U.S. Geological Survey's National Hydrography Dataset (NHD). Specific information on the NHD version used to derive Version 2 and where Version 2 was mapped can be found in the 'comments' field of the Wetlands_Project_Metadata feature class. Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of \"farmed wetlands\" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps. 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For information regarding the scope and recommended methods to be used in conducting the required site investigations, see DMG Special Publication 42, Fault-Rupture Hazard Zones in California. Information about the Alquist-Priolo Earthquake Fault Zoning (AP) Act and links to data downloads is here.UPDATE HISTORY:11/6/13 - ADDED to SDE11/13/14 - Updated for Hollywood and Azusa Quad Sheets12/10/15 - Updated for Mescal Creek and Mount San Antonio Quad Sheets1/18/18 - Updated with data from Calif. Dept. of Conservation, Calif. Geological Survey11/26/24 - Updated with data from state for the following quad sheets in the NW Antelope Valley: Burnt Peak, Lake Hughes, and Del Sur. 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Using that data, the Los Angeles County Department of Public Works has developed a public-facing web viewer for accessing flood zone information in the County of Los Angeles (Flood Zone Determination Website). Flood zones are represented by letters for special flood hazard areas by FEMA. For example, Zone A areas have a 1 percent annual chance of flooding. This flood is also called the 100-year flood. Property owners with structures in Flood Zone A, which have a federally backed mortgage are required to obtain flood insurance.Supplemental Information:Data from Flood Insurance Rate Maps (FIRMs), where available digitally, can be found on the official FEMA\u2019s National Flood Hazard Layer.The DFIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper Flood Insurance Rate Maps (FIRMs)FEMA Flood Maps can be obtained from the the FEMA Flood Map Service Center (MSC)The National Flood Hazard Layer (NFHL) is a digital database that contains flood hazard mapping data from FEMA\u2019s National Flood Insurance Program (NFIP). 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UPDATED - 12/4/14 - data current as of October, 2014. Below is a list of species in Los Angeles County and their Federal Register info (spreadsheet can be found in OTHER_AGENCIES/USFWS/2014_Download)Brodiaea, Thread-Leaved (Brodiaea filifolia)Federal Register (Feb 8, 2011)Butterfly, Palos Verdes Blue (Glaucopsyche lygdamus palosverdesensis)Federal Register (Jul 2, 1980)Condor, California (Gymnogyps californianus)Federal Register (Sep 22, 1977)Flycatcher, Southwestern Willow (Empidonax traillii extimus)Federal Register (Jan 3, 2013)Frog, California red-legged (Rana draytonii)Federal Register (Mar 17, 2010)Frog, Mountain Yellow-Legged (Rana muscosa)Federal Register (Sep 14, 2006)Gnatcatcher, Coastal California (Polioptila californica californica)Federal Register (Dec 19, 2007)Goby, Tidewater (Eucyclogobius newberryi)Federal Register (Feb 6, 2013)Milk-vetch, Braunton's (Astragalus brauntonii)Federal Register (Nov 14, 2006)Navarretia, Spreading (Navarretia fossalis)Federal Register (Oct 7, 2010)Pentachaeta, Lyon's (Pentachaeta lyonii)Federal 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