CAL FIRE 23_1 vector digital data DISCLAIMER The State of California and the Department of Forestry and Fire Protection make no representations or warranties regarding the accuracy of data or maps. The user will not seek to hold the State or the Department liable under any circumstances for any damages with respect to any claim by the user or any third party on account of or arising from the use of data or maps. The user will cite the Department of Forestry and Fire Protection as the original source of the data, but will clearly denote cases where the original data have been updated, modified, or in any way altered from the original condition. https://www.fire.ca.gov/what-we-do/fire-resource-assessment-program/fire-perimeters https://wildlife.ca.gov/Data/BIOS https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/300_399/ds397.zip The "rxburn" dataset contains perimeters from multiple agencies, representing prescribed fires, fire use, machine pile burns, hand pile burns and jackpot burns, with associated tabular data for responsible agency, project number, project name, start date, acres reported and more. Data provided are merged from sources of varying quality. There has been a significant amount of work to resolve duplicate prescribed fires (from different sources). This layer is a best attempt and does not include complete data for all agencies. Two of the attributes in this dataset, PRE_CON_CLASS and POST_CON_CLASS are based on an abstract concept called "Condition Class." There is more information about "Condition Class" in the Overview Description / Entity and Attribute Overview section.Version 23_1 was released in May 2024 and includes 1,134 fire related fuel treatments from: BLM (15), CAL FIRE (95) & Contract Counties (16), CA State Parks (103), Local Response Area (6), NPS (8), USFS (835), USFW (4), private (20) and other (32) for projects completed in 2023. Prescribed fires consume and rearrange natural fuel on the landscape. This data is used to update fuel models maintained by CAL FIRE and its cooperating agencies, other state departments and private organizations. Treatments are tracked as part of the California Strategic Fire Plan in order to identify where previous fire use allowed wildfire to be fought at a lower cost and helped prevent losses. No prescribed burn data for Alameda and San Francisco counties. In work Annually -124.495992 -115.327125 42.048584 32.555047 None Prescribed fire, California, Vegetation Management Program, VMP, Control burns, fuel treatment, machine pile burns, hand pile burns, jackpot, fire use, VTP, Vegetation Treatment Program, Rx fire ISO 19115 Topic Categories environment None California None This is a reasonably complete digital record of modern fire use history in California. However, it is still incomplete in many respects. Fires may be missing altogether or have missing or incorrect attribute data. Some burns may be missing because historical records were lost or damaged, were too small for the minimum cutoffs, had inadequate documentation or have not yet been incorporated into the database. Other errors with the fire perimeter database include duplicate fires and over-generalization. The data capture process attempts to identify duplicate fires resulting from multiple data sources (i.e. the USFS and CAL FIRE both captured and submitted the fire perimeter), some duplicates may still exist. Additionally, over-generalization, particularly with large old fires may show unburned "islands" within the final perimeter as burned or where treatment areas were defined but geometry was not modified to account for actual burned area. Users of the fire perimeter database must exercise caution in application of the data. Careful use of the fire perimeter database will prevent users from drawing inaccurate or erroneous conclusions from the data.Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data. California Department of Forestry & Fire Protection, Fire & Resource Assessment Program Kimberly Wallin Data Steward unknown

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Sacramento CA 95814 916-902-9704 kimberly.wallin@fire.ca.gov California Department of Forestry & Fire Protection, Fire & Resource Assessment Program Kimberly Wallin Data Steward unknown

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Sacramento CA 95814 916-902-9704 kimberly.wallin@fire.ca.gov Includes input perimeters from CAL FIRE, contract counties, U.S. Forest Service, Bureau of Land Management, National Park Service, California State Parks, U.S. Fish and Wildlife, and other organizations. Version 6.2 (Build 9200) ; Esri ArcGIS Pro 3.1.0 This is the most comprehensive digital record of fuel treatments history in California. However, it is still incomplete in many respects. Treatments may be missing altogether or have missing or incorrect attribute data. Some treatments may be missing because historical records were lost or damaged, were too small for the minimum cutoffs, had inadequate documentation or have not yet been incorporated into the database. There are fires without info in the YEAR field, they will be investigated and the information will be added in a subsequent update. For more information of condition classes see: Hann, Wendel J. 2002. Mapping fire regime condition class: a method for watershed and project scale analysis. Proceedings of the 22 nd Tall Timbers Fire Ecology Conference: Fire in Temperate, Boreal, and Montane Ecosystems. Tall Timbers Research Station, Tallahassee, FL Vector GT-polygon composed of chains 9769 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 rxburn23_1 CAL FIRE FRAP OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. STATE The State where the fire use occurred. AGENCY Responsible agency CAL FIRE FRAP BIA USDI Bureau of Indian Affairs CAL FIRE FRAP BLM Bureau of Land Management CAL FIRE FRAP CDF CAL FIRE/California Department of Forestry and Fire Protection CAL FIRE FRAP CCO Contract Counties CAL FIRE FRAP DOD Department of Defense CAL FIRE FRAP FWS USDI Fish and Wildlife Service CAL FIRE FRAP LRA Local Responsibility Area CAL FIRE FRAP NON No Protection CAL FIRE FRAP NPS National Park Service CAL FIRE FRAP PVT Private CAL FIRE FRAP USF United States Forest Service CAL FIRE FRAP OTH Other CAL FIRE FRAP UNIT_ID Responsible Unit (ICS code) CAL FIRE FRAP AEU Amador-El Dorado CDF AFV Vandenberg Air Force Base APF US ARMY Post FD (Ft.Hunter Ligget) BBD Central CA Region BLM BDF San Bernardino National Forest BDU San Bernardino CDF BEU Monterey - San Benito CDF BNP Lava Beds National Monument BTU Butte CDF CAP Cabrillo National Monument CCD Carson City District CDD Desert District BLM CNF Cleveland National Forest CNP Channel Islands National Park CRB Camp Roberts Military Base CZU San Mateo - Santa Cruz CDF DPP Devils Postpile National Monument DVP Death Valley National Park ENF Eldorado National Forest EOP Eugene O'Neill National Historic Site FKU Fresno - Kings CDF FPP Fort Point National Historic Site GNP Golden Gate National Park HUU Humboldt - Del Norte CDF INF Inyo National Forest JMP John Muir National Historic Site JTP Joshua Tree National Monument KNF Klamath National Forest KNP Sequoia - Kings Canyon National Park KRN Kern County LAC Los Angeles County LMU Lassen - Modoc CDF LNF Lassen National Forest LNP Lassen Volcanic National Park LNU Sonoma - Lake - Napa CDF LPF Los Padres National Forest MDP Modoc National Forest MEU Mendocino CDF MMU Madera - Mariposa -Merced CDF MNF Mendocino National Forest MNP Mojave National Park MVU San Diego CDF (Retired Code) MWP Muir Woods National Monument NEU Nevada - Yuba - Placer CDF NOD Northern CA Resource Area BLM ORC Orange County PNF Plumas National Forest PSF Presidio of San Francisco RNP Point Reyes National Seashore RRU Riverside CDF RWP Redwood National Park SBC Santa Barbara County SCU Santa Clara CDF SDU San Diego CDF SHF Shasta - Trinity National Forest SHU Shasta - Trinity CDF SKU Siskiyou CDF SLU San Luis Obispo CDF SMP Santa Monica Mountains National Recreation Area SNF Sierra National Forest SNU Sonoma CDF (no longer exists) SQF Sequoia National Forest SRF Six Rivers National Forest STF Stanislaus National Forest TCU Tuolumne - Calaveras CDF TGU Tehama - Glenn CDF TMU Lake Tahoe Management Basin TNF Tahoe National Forest TOI Toiyabe National Forest TUU Tulare CDF VNC Ventura County WNP Whiskeytown National Recreation Area YNP Yosemite National Park YEAR_ Year the treatment was completed TREATMENT_NAME Responsible agency's name for the treatment. TREATMENT_ID Responsible agency's number assigned to treatment. START_DATE Date project started END_DATE Date project ended TREATMENT_TYPE Method used to modify fuel conditions 1 Broadcast Burn 2 Fire Use 3 Hand Pile Burn 4 Jackpot Burn 5 Machine Pile Burn TREATED_AC Amount of land treated (acres) RX_CONSUM Fuel consumption index. 1 LOW: Less than 50% of treatment area burned, very light reduction in fine fuel elements. 2 MODERATE: Between (50%-90%) of treatment area burned, and/or moderate (25-50%) reduction in fine fuels. 3 HIGH: Full (>90%) coverage of fire of treatment area burned, with associated significant (50-75%) reduction in fine fuels. 4 VERY HIGH: Full (>90%) coverage of fire of treatment area burned, with very high consumption (>75%) of fine fuel elements. PRE_CON_CLASS The condition class of the ecosystems before the treatment. Condition class refers to the general deviation of ecosystems from their pre-settlement natural condition. 1 Fire regime within or near historical range. Risk of losing key components that define the ecosystem is low. 2 Fire regime moderately altered from historical range. Risk of losing key components that define the ecosystem is moderate. 3 Fire regime moderately altered from historical range. Risk of losing key components that define the ecosystem is high. POST_CON_CLASS The condition class of the ecosystems after the treatment. Condition class refers to the general deviation of ecosystems from their pre-settlement natural condition. 1 Fire regime within or near historical range. Risk of loosing key components that define the ecosystem is low. 2 Fire regime moderately altered from historical range. Risk of loosing key components that define the ecosystem is moderate. 3 Fire regime significantly altered from historical range. Risk of loosing key components that define the ecosystem is high.. GIS_ACRES Calculated area that was treated based on Shape_Area. Shape_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. Shape_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. Condition Class: Condition class refers to the general deviation of ecosystems from their pre-settlement natural fire regime (See attributes REGIME and REGIME_CAL of Cal Fire Fire Regime and Condition Class data set a the same location as this data), and can be viewed as a measure of sensitivity to fire damage to key elements and processes typical of those ecosystems, or fire-related risk to ecosystem health. Fundamental to this idea is that current expected fires are compared to historic fire regimes with respect to fire frequency, size and patchiness, and effects on key ecosystem elements and processes. These classes are then assigned based on current vegetation type and structure, an understanding of its pre-settlement fire regime, and current conditions regarding expected fire frequency and potential fire behavior. Condition Classes were thus defined as the relative risk of losing key components that define an ecosystem (Hardy et al., 2001). The conceptual basis is that for fire-adapted ecosystems, much of their ecological structure and processes are driven by fire, and disruption of fire regimes leads to changes in plant composition and structure, uncharacteristic fire behavior and other disturbance agents (pests), altered hydrologic processes and increased smoke production. Condition Class 1 is associated with low level disruption of fire regime, and consequently low risk to loss or damage. Condition Class 2 indicates some degree of departure from natural regimes, with associated changes in ecosystem composition and structure that render future fires a likelihood of some loss and change in elements and processes. Condition class 3 is highly divergent from natural regime conditions, and presents the highest level of risk of loss. For more information of condition classes see: Hann, Wendel J. 2002. Mapping fire regime condition class: a method for watershed and project scale analysis. CON_CLASS DESCRIPTION ------------------ -------------------- 1 Fire regime within or near historical range. Risk of key ecosystem component loss low. 2 Fire regime moderately altered from historical range. Risk of key ecosystem component loss moderate. 3 Fire regime significantly altered from historical range. Risk of key ecosystem component loss high. Please direct questions regarding assigning this attribute to David Sapsis, 916.445.5369 As of Jan 1st, 2007 the term CAL FIRE will be used in reference to CDF and The California Department of Forestry and Fire Protection. Fire perimeters still use the term "CDF". 20240530 20250430 California Department of Forestry & Fire Protection, Fire & Resource Assessment Program Kimberly Wallin Data Steward unknown

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Sacramento CA 95814 916-902-9704 kimberly.wallin@fire.ca.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time