{"columns":[{"name":"code","type":"string"},{"name":"label","type":"string"},{"name":"fuel_units","type":"dictionary<values=string, indices=int32, ordered=0>"},{"name":"min_fuel_mmbtu_per_unit","type":"float"},{"name":"max_fuel_mmbtu_per_unit","type":"float"},{"name":"fuel_group_eia","type":"dictionary<values=string, indices=int32, ordered=0>"},{"name":"fuel_derived_from","type":"dictionary<values=string, indices=int32, ordered=0>"},{"name":"fuel_phase","type":"dictionary<values=string, indices=int32, ordered=0>"},{"name":"fuel_type_code_pudl","type":"dictionary<values=string, indices=int32, ordered=0>"},{"name":"description","type":"string"}],"n_rows":42,"rows_kept":42,"cut":false,"text_format":"parquet-jsonl-2026-10-02","bounds":{"document_bytes":16777216,"package_text_limit_bytes":33554432,"package_text_slack_bytes":1024,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096,"vector_min":64,"vector_head_fixed":16,"vector_head_variable":64,"kv_value_chars":1048576,"nesting_max":64,"binary_text":true},"cells_cut":0,"cells_bad_utf8":0,"cells_raw":0,"cells_binary":0,"cells_binary_text":0,"cells_vector":0,"n_row_groups":1,"reader":"pyarrow 23.0.1, python 3.13","created_by":"parquet-cpp-arrow version 23.0.1","schema":{"fields":[{"name":"code","type":"string","nullable":false,"metadata":[["description","Originally reported short code."]],"children":null},{"name":"label","type":"string","nullable":true,"metadata":[["description","Longer human-readable code using snake_case"]],"children":null},{"name":"fuel_units","type":"dictionary<values=string, indices=int32, ordered=0>","nullable":true,"metadata":[["description","Reported unit of measure for fuel."]],"children":null},{"name":"min_fuel_mmbtu_per_unit","type":"float","nullable":true,"metadata":[["description","Minimum heat content per physical unit of fuel in MMBTU."]],"children":null},{"name":"max_fuel_mmbtu_per_unit","type":"float","nullable":true,"metadata":[["description","Maximum heat content per physical unit of fuel in MMBTU."]],"children":null},{"name":"fuel_group_eia","type":"dictionary<values=string, indices=int32, ordered=0>","nullable":true,"metadata":[["description","High level fuel group defined in the 2021-2023 EIA Form 860 instructions, Table 28."]],"children":null},{"name":"fuel_derived_from","type":"dictionary<values=string, indices=int32, ordered=0>","nullable":true,"metadata":[["description","Original fuel from which this refined fuel was derived."]],"children":null},{"name":"fuel_phase","type":"dictionary<values=string, indices=int32, ordered=0>","nullable":true,"metadata":[["description","Physical phase of matter of the fuel."]],"children":null},{"name":"fuel_type_code_pudl","type":"dictionary<values=string, indices=int32, ordered=0>","nullable":true,"metadata":[["description","Simplified fuel type code used in PUDL"]],"children":null},{"name":"description","type":"string","nullable":true,"metadata":[["description","Long human-readable description of the meaning of a code/label."]],"children":null}],"parquet":"required group field_id=-1 schema {\n  required binary field_id=-1 code (String);\n  optional binary field_id=-1 label (String);\n  optional binary field_id=-1 fuel_units (String);\n  optional float field_id=-1 min_fuel_mmbtu_per_unit;\n  optional float field_id=-1 max_fuel_mmbtu_per_unit;\n  optional binary field_id=-1 fuel_group_eia (String);\n  optional binary field_id=-1 fuel_derived_from (String);\n  optional binary field_id=-1 fuel_phase (String);\n  optional binary field_id=-1 fuel_type_code_pudl (String);\n  optional binary field_id=-1 description (String);\n}\n"},"kv_metadata":[["pandas","{\"index_columns\": [], \"column_indexes\": [], \"columns\": [{\"name\": \"code\", \"field_name\": \"code\", \"pandas_type\": \"unicode\", \"numpy_type\": \"string\", \"metadata\": null}, {\"name\": \"label\", \"field_name\": \"label\", \"pandas_type\": \"unicode\", \"numpy_type\": \"string\", \"metadata\": null}, {\"name\": \"fuel_units\", \"field_name\": \"fuel_units\", \"pandas_type\": \"categorical\", \"numpy_type\": \"int8\", \"metadata\": {\"num_categories\": 4, \"ordered\": false}}, {\"name\": \"min_fuel_mmbtu_per_unit\", \"field_name\": \"min_fuel_mmbtu_per_unit\", \"pandas_type\": \"float32\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"max_fuel_mmbtu_per_unit\", \"field_name\": \"max_fuel_mmbtu_per_unit\", \"pandas_type\": \"float32\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"fuel_group_eia\", \"field_name\": \"fuel_group_eia\", \"pandas_type\": \"categorical\", \"numpy_type\": \"int8\", \"metadata\": {\"num_categories\": 3, \"ordered\": false}}, {\"name\": \"fuel_derived_from\", \"field_name\": \"fuel_derived_from\", \"pandas_type\": \"categorical\", \"numpy_type\": \"int8\", \"metadata\": {\"num_categories\": 5, \"ordered\": false}}, {\"name\": \"fuel_phase\", \"field_name\": \"fuel_phase\", \"pandas_type\": \"categorical\", \"numpy_type\": \"int8\", \"metadata\": {\"num_categories\": 3, \"ordered\": false}}, {\"name\": \"fuel_type_code_pudl\", \"field_name\": \"fuel_type_code_pudl\", \"pandas_type\": \"categorical\", \"numpy_type\": \"int8\", \"metadata\": {\"num_categories\": 9, \"ordered\": false}}, {\"name\": \"description\", \"field_name\": \"description\", \"pandas_type\": \"unicode\", \"numpy_type\": \"string\", \"metadata\": null}], \"attributes\": {}, \"creator\": {\"library\": \"pyarrow\", \"version\": \"23.0.1\"}, \"pandas_version\": \"2.3.3\"}"],["primary_key","code"],["ARROW:schema",{"$cut":{"chars":5408,"head":""}}],["description","Code table containing descriptions of categorical codes for energy sources reported to EIA.\n\n\n\nProcessing:\n  Data has been cleaned and organized into well-modeled tables that serve as building blocks for downstream wide tables and analyses.\n\nSource:\n  EIA -- Mix of multiple EIA Forms\n\nPrimary key:\n  code\n\n\nUsage Warnings\n^^^^^^^^^^^^^^\n\n\n* Contains information from multiple raw inputs.\n\n\n\n\n\nAdditional Details\n^^^^^^^^^^^^^^^^^^\n\nCompiled from EIA-860 instructions and EIA-923 file layout spreadsheets."]]}
["AB","agricultural_byproducts","short_tons",7.0,18.0,"renewable","biomass","solid","waste","Agricultural by-products"]
["ANT","anthracite","short_tons",22.0,28.0,"fossil","coal","solid","coal","Anthracite coal"]
["BFG","blast_furnace_gas","mcf",0.07,0.12,"fossil","gas","gas","gas","Blast furnace gas"]
["BIT","bituminous_coal","short_tons",20.0,29.0,"fossil","coal","solid","coal","Bituminous coal"]
["BLQ","black_liquor","short_tons",10.0,14.0,"renewable","biomass","liquid","waste","Black liquor"]
["DFO","distillate_fuel_oil","barrels",5.5,6.2,"fossil","petroleum","liquid","oil","Distillate fuel oil, including diesel, No. 1, No. 2, and No. 4 fuel oils"]
["GEO","geothermal",null,null,null,"renewable","other",null,"other","Geothermal"]
["JF","jet_fuel","barrels",5.0,6.0,"fossil","petroleum","liquid","oil","Jet fuel"]
["KER","kerosene","barrels",5.6,6.1,"fossil","petroleum","liquid","oil","Kerosene"]
["LFG","landfill_gas","mcf",0.3,0.6,"renewable","biomass","gas","waste","Landfill gas"]
["LIG","lignite","short_tons",10.0,14.5,"fossil","coal","solid","coal","Lignite coal"]
["MSB","municipal_solid_waste_biogenic","short_tons",9.0,12.0,"renewable","biomass","solid","waste","Municipal solid waste (biogenic)"]
["MSN","municipal_solid_nonbiogenic","short_tons",9.0,12.0,"fossil","petroleum","solid","waste","Municipal solid waste (non-biogenic)"]
["MSW","municipal_solid_waste","short_tons",9.0,12.0,"renewable","biomass","solid","waste","Municipal solid waste (all types)"]
["MWH","electricity_storage","mwh",null,null,"other","other",null,"other","Electricity used for electricity storage"]
["NG","natural_gas","mcf",0.8,1.1,"fossil","gas","gas","gas","Natural gas"]
["NUC","nuclear",null,null,null,"other","other",null,"nuclear","Nuclear, including uranium, plutonium, and thorium"]
["OBG","other_biomass_gas","mcf",0.36,1.6,"renewable","biomass","gas","waste","Other biomass gas, including digester gas, methane, and other biomass gasses"]
["OBL","other_biomass_liquid","barrels",3.5,4.0,"renewable","biomass","liquid","waste","Other biomass liquids"]
["OBS","other_biomass_solid","short_tons",8.0,25.0,"renewable","biomass","solid","waste","Other biomass solids"]
["OG","other_gas","mcf",0.32,3.3,"fossil","other","gas","gas","Other gas"]
["OTH","other",null,null,null,"other","other",null,"other","Other"]
["PC","petroleum_coke","short_tons",24.0,30.0,"fossil","petroleum","solid","coal","Petroleum coke"]
["PG","propane_gas","mcf",2.5,2.75,"fossil","petroleum","gas","gas","Gaseous propane"]
["PUR","purchased_steam",null,null,null,"other","other",null,"other","Purchased steam"]
["RC","refined_coal","short_tons",20.0,29.0,"fossil","coal","solid","coal","Refined coal"]
["RFO","residual_fuel_oil","barrels",5.7,6.9,"fossil","petroleum","liquid","oil","Residual fuel oil, including Nos. 5 & 6 fuel oils and bunker C fuel oil"]
["SC","coal_synfuel","short_tons",null,null,"fossil","coal","solid","coal","Coal synfuel. Coal-based solid fuel that has been processed by a coal synfuel plant, and coal-based fuels such as briquettes, pellets, or extrusions, which are formed from fresh or recycled coal and binding materials."]
["SG","syngas_other","mcf",null,null,"fossil","other","gas","gas","Synthetic gas, other than coal-derived"]
["SGC","syngas_coal","mcf",0.2,0.3,"fossil","coal","gas","gas","Coal-derived synthesis gas"]
["SGP","syngas_petroleum_coke","mcf",0.2,1.1,"fossil","petroleum","gas","gas","Synthesis gas from petroleum coke"]
["SLW","sludge_waste","short_tons",10.0,16.0,"renewable","biomass","liquid","waste","Sludge waste"]
["SUB","subbituminous_coal","short_tons",15.0,20.0,"fossil","coal","solid","coal","Sub-bituminous coal"]
["SUN","solar",null,null,null,"renewable","other",null,"solar","Solar"]
["TDF","tire_derived_fuels","short_tons",16.0,32.0,"other","other","solid","waste","Tire-derived fuels"]
["WAT","water",null,null,null,"renewable","other",null,"hydro","Water at a conventional hydroelectric turbine, and water used in wave buoy hydrokinetic technology, current hydrokinetic technology, and tidal hydrokinetic technology, or pumping energy for reversible (pumped storage) hydroelectric turbine"]
["WC","waste_coal","short_tons",6.5,16.0,"fossil","coal","solid","coal","Waste/Other coal, including anthracite culm, bituminous gob, fine coal, lignite waste, waste coal."]
["WDL","wood_liquids","barrels",8.0,14.0,"renewable","biomass","liquid","waste","Wood waste liquids excluding black liquor, including red liquor, sludge wood, spent sulfite liquor, and other wood-based liquids"]
["WDS","wood_solids","short_tons",7.0,18.0,"renewable","biomass","solid","waste","Wood/Wood waste solids, including paper pellets, railroad ties, utility poles, wood chips, park, and wood waste solids"]
["WH","waste_heat",null,null,null,"other","other",null,"other","Waste heat not directly attributed to a fuel source. WH should only be reported when the fuel source is undetermined, and for combined cycle steam turbines that do not have supplemental firing."]
["WND","wind",null,null,null,"renewable","other",null,"wind","Wind"]
["WO","waste_oil","barrels",3.0,5.8,"fossil","petroleum","liquid","oil","Waste/Other oil, including crude oil, liquid butane, liquid propane, naptha, oil waste, re-refined motor oil, sludge oil, tar oil, or other petroleum-based liquid wastes"]