{ "aliases": [ { "relation": "exact", "review_state": "source", "source_entity_id": "2185", "source_ref": "pudl-plants" }, { "basis": "EHA 2026 EIA_PtID 2185 = EIA plant; state MT; EHA point 0.14 km from EIA point; names share a token; HILARRI v4 links EHA id to NID MT00560 (Hauser Dam, Missouri River), NID point 0.12 km from EIA point; NID purposes: Hydroelectric;Recreation;Flood Risk Reduction", "evidence_url": "https://hydrosource.ornl.gov/data/datasets/hilarri-v4/", "kind": "hydro_plant", "name": "Hauser", "note": "Hydropower is a reported purpose in the NID and GRanDv1.3. Associated power plant is included in the EHA.", "relation": "exact", "review_state": "reviewed", "reviewed_on": "2026-09-21", "source_entity_id": "hc1292_p01", "source_ref": "ornl-eha-2026", "source_url": "https://hydrosource.ornl.gov/data/datasets/eha-plant-2026/", "water": "Missouri River" }, { "basis": "EHA 2026 EIA_PtID 2185 = EIA plant; state MT; EHA point 0.14 km from EIA point; names share a token; HILARRI v4 links EHA id to NID MT00560 (Hauser Dam, Missouri River), NID point 0.12 km from EIA point; NID purposes: Hydroelectric;Recreation;Flood Risk Reduction", "evidence_url": "https://hydrosource.ornl.gov/data/datasets/hilarri-v4/", "kind": "dam", "name": "Hauser Dam", "note": "Hydropower is a reported purpose in the NID and GRanDv1.3. Associated power plant is included in the EHA.", "relation": "component", "review_state": "reviewed", "reviewed_on": "2026-09-21", "source_entity_id": "MT00560", "source_ref": "usace-nid", "source_url": "https://nid.sec.usace.army.mil/" }, { "basis": "EHA 2026 EIA_PtID 2185 = EIA plant; state MT; EHA point 0.14 km from EIA point; names share a token; HILARRI v4 links EHA id to NID MT00560 (Hauser Dam, Missouri River), NID point 0.12 km from EIA point; NID purposes: Hydroelectric;Recreation;Flood Risk Reduction", "evidence_url": "https://hydrosource.ornl.gov/data/datasets/hilarri-v4/", "ids": { "grand_id": "332", "huc12": "100301012001", "nhdplusv2_comid": "3024850" }, "kind": "water_links", "name": null, "note": "Hydropower is a reported purpose in the NID and GRanDv1.3. Associated power plant is included in the EHA.", "relation": "exact", "review_state": "reviewed", "reviewed_on": "2026-09-21", "source_entity_id": "1620", "source_ref": "ornl-hilarri-v4", "source_url": "https://hydrosource.ornl.gov/data/datasets/hilarri-v4/" } ], "citation_path": "citations/plant~eia~2185.html", "context": { "nearby_bpa_lines": [], "nearby_bpa_lines_status": { "available": true, "method": "Planar distance in the CONUS Albers projection (EPSG:5070) from the reported plant point to the published geometry, within about 1% in the region; features within 3 km, nearest first. Context only: nearness is not an electrical connection.", "note": "nearby_lines holds BPA's published lines and HIFLD-compiled lines of other owners (source_ref on each row); nearby_bpa_lines is the BPA subset; substations are HIFLD 2022 points at 100 kV and above", "radius_km": 3.0, "reason": null }, "nearby_lines": [], "nearby_substations": [], "territories": [ { "id": "territory:mtcoop:23", "name": "Vigilante Electric CO-OP", "note": "Plant coordinate lies inside this approximate territory polygon; candidate only, not a supply or service relationship", "relation": "candidate", "source_ref": "mt-coop-territories" } ] }, "coverage": { "generators_eligible": 12, "generators_operating": 5, "generators_published": 12, "output_years": [ 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024 ], "ownership_known_generators": 9 }, "disclosed_claims": { "note": "Washington Fuel Mix Disclosure claims on this plant for CY2024, the latest year loaded; several suppliers can claim one plant; a claim attributes retail sales, it is not a wire or a share of ownership", "report_year": 2024, "rows": [], "source_ref": "wa-fmd-2024-by-plant" }, "emissions": { "available": false, "generators_monitored": 0, "generators_total": 0, "history": [], "note": "This plant has no coal, gas, oil or waste generator, so it has no combustion unit for EPA to monitor and no CEMS data exists. That is not a claim of zero emissions: the atlas reports only what EPA-monitored units filed.", "reason": "not_applicable", "source_ref": "pudl-epacems", "units_monitored": 0, "year": 2024 }, "events": [], "facts": [ { "basis": "Sum of generator nameplate MW with operational status code OP in the inventory year; one row per generator; unscaled by ownership", "coverage": { "eligible": 5, "included": 5, "unit": "operating generators" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#nameplate_mw_op@2024", "label": "Nameplate capacity, operating generators", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "nameplate_mw_op", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 16.3 }, { "basis": "Generator rows for the plant in the inventory year, any status", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#generator_count@2024", "label": "Generators listed", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "generator_count", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 0, "quality": "valid", "source_ref": "pudl-generators", "unit": "count", "value": 12.0 }, { "basis": "Generator rows with status code OP", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#generator_count_op@2024", "label": "Operating generators", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "generator_count_op", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 0, "quality": "valid", "source_ref": "pudl-generators", "unit": "count", "value": 5.0 }, { "basis": "Sum of generator nameplate MW with status category proposed (planned, under construction, cancelled and similar codes) as listed in the inventory year; a proposal is not a commitment", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#nameplate_mw_proposed@2024", "label": "Nameplate capacity, proposed generators", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "nameplate_mw_proposed", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 10.5 }, { "basis": "Sum of generator nameplate MW with status code RE as listed in the inventory year's file; not a complete retirement history", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#nameplate_mw_retired@2024", "label": "Nameplate capacity, retired generators listed", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "nameplate_mw_retired", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 12.299999999999999 }, { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2024", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8784, "kind": "calendar_year", "period_end": "2025-01-01T00:00:00Z", "period_start": "2024-01-01T00:00:00Z", "year": 2024 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 134425.0 }, { "basis": "Net generation MWh / (operating nameplate MW x hours in year); only when every operating generator was operating before the year began and none retired during it", "coverage": null, "denominator": { "hours": 8784, "metric": "nameplate_mw_op", "unit": "MW", "value": 16.3 }, "evidence": "reported", "fact_id": "plant:eia:2185#capacity_factor@2024", "label": "Capacity factor", "locator": "derived: net_generation_mwh@2024 / (nameplate_mw_op x 8784 h)", "maturity": "final", "method": "derived", "metric": "capacity_factor", "missing_reason": null, "note": null, "period": { "hours": 8784, "kind": "calendar_year", "period_end": "2025-01-01T00:00:00Z", "period_start": "2024-01-01T00:00:00Z", "year": 2024 }, "precision": 3, "quality": "valid", "source_ref": "pudl-output", "unit": "fraction", "value": 0.9388584375384134 } ], "generators": [ { "dates": { "note": "EIA-860 reports month and year; day is a placeholder", "operating": "1911-11-01", "original_planned_operating": null, "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": "2023-09-01" }, "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "facts": [ { "basis": "Generator nameplate capacity as reported on EIA-860", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU1#capacity_mw@2024", "label": "Nameplate capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU1", "maturity": "final", "method": "derived", "metric": "capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 2.8 }, { "basis": "Reported or source-estimated net summer capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU1#summer_capacity_mw@2024", "label": "Net summer capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU1", "maturity": "final", "method": "derived", "metric": "summer_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 2.8 }, { "basis": "Reported or source-estimated net winter capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU1#winter_capacity_mw@2024", "label": "Net winter capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU1", "maturity": "final", "method": "derived", "metric": "winter_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 2.8 } ], "generator_id": "HAU1", "id": "generator:eia:2185:HAU1", "is_storage": false, "operator": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "ownership": { "basis": "eia860_schedule4_default", "invalid_shares": false, "note": null, "shares": [ { "basis": "eia860_schedule4_default", "evidence": "reported", "fraction": 1.0, "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU1; ownership_code=S; rule=eia860_schedule4_default", "method": "derived", "owned_mw": 2.8, "owner": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "reason": "eia860_schedule4_default", "source_ref": "pudl-generators" } ], "unassigned_fraction": 0.0, "unassigned_mw": 0.0, "unknown_reason": null }, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" }, "resource_group": "hydro", "status": { "category": "retired", "code": "RE", "label": "retired" }, "storage": null, "technology": "Conventional Hydroelectric" }, { "dates": { "note": "EIA-860 reports month and year; 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report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU10", "maturity": "final", "method": "derived", "metric": "summer_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 }, { "basis": "Reported or source-estimated net winter capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU10#winter_capacity_mw@2024", "label": "Net winter capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU10", "maturity": "final", "method": "derived", "metric": "winter_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 } ], "generator_id": "HAU10", "id": "generator:eia:2185:HAU10", "is_storage": false, "operator": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "ownership": { "basis": "unknown", "invalid_shares": false, "note": "Ownership not established from source; 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report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU11", "maturity": "final", "method": "derived", "metric": "winter_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 } ], "generator_id": "HAU11", "id": "generator:eia:2185:HAU11", "is_storage": false, "operator": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "ownership": { "basis": "eia860_schedule4_default", "invalid_shares": false, "note": null, "shares": [ { "basis": "eia860_schedule4_default", "evidence": "reported", "fraction": 1.0, "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU11; ownership_code=S; rule=eia860_schedule4_default", "method": "derived", "owned_mw": 3.5, "owner": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "reason": "eia860_schedule4_default", "source_ref": "pudl-generators" } ], "unassigned_fraction": 0.0, "unassigned_mw": 0.0, "unknown_reason": null }, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" }, "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "storage": null, "technology": "Conventional Hydroelectric" }, { "dates": { "note": "EIA-860 reports month and year; 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report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU7; ownership_code=S; rule=eia860_schedule4_default", "method": "derived", "owned_mw": 3.5, "owner": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "reason": "eia860_schedule4_default", "source_ref": "pudl-generators" } ], "unassigned_fraction": 0.0, "unassigned_mw": 0.0, "unknown_reason": null }, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" }, "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "storage": null, "technology": "Conventional Hydroelectric" }, { "dates": { "note": "EIA-860 reports month and year; day is a placeholder", "operating": "2022-11-01", "original_planned_operating": null, "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": null }, "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "facts": [ { "basis": "Generator nameplate capacity as reported on EIA-860", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU8#capacity_mw@2024", "label": "Nameplate capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU8", "maturity": "final", "method": "derived", "metric": "capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 }, { "basis": "Reported or source-estimated net summer capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU8#summer_capacity_mw@2024", "label": "Net summer capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU8", "maturity": "final", "method": "derived", "metric": "summer_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 }, { "basis": "Reported or source-estimated net winter capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU8#winter_capacity_mw@2024", "label": "Net winter capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU8", "maturity": "final", "method": "derived", "metric": "winter_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 } ], "generator_id": "HAU8", "id": "generator:eia:2185:HAU8", "is_storage": false, "operator": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "ownership": { "basis": "eia860_schedule4_default", "invalid_shares": false, "note": null, "shares": [ { "basis": "eia860_schedule4_default", "evidence": "reported", "fraction": 1.0, "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU8; ownership_code=S; rule=eia860_schedule4_default", "method": "derived", "owned_mw": 3.5, "owner": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "reason": "eia860_schedule4_default", "source_ref": "pudl-generators" } ], "unassigned_fraction": 0.0, "unassigned_mw": 0.0, "unknown_reason": null }, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" }, "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "storage": null, "technology": "Conventional Hydroelectric" }, { "dates": { "note": "EIA-860 reports month and year; day is a placeholder", "operating": null, "original_planned_operating": "2028-06-01", "planned_operating": "2028-06-01", "planned_retirement": null, "precision": "month", "retirement": null }, "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "facts": [ { "basis": "Generator nameplate capacity as reported on EIA-860", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU9#capacity_mw@2024", "label": "Nameplate capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU9", "maturity": "final", "method": "derived", "metric": "capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 }, { "basis": "Reported or source-estimated net summer capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU9#summer_capacity_mw@2024", "label": "Net summer capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU9", "maturity": "final", "method": "derived", "metric": "summer_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 }, { "basis": "Reported or source-estimated net winter capability", "coverage": null, "denominator": null, "evidence": "reported", "fact_id": "generator:eia:2185:HAU9#winter_capacity_mw@2024", "label": "Net winter capacity", "locator": "out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=2185; generator_id=HAU9", "maturity": "final", "method": "derived", "metric": "winter_capacity_mw", "missing_reason": null, "note": null, "period": { "kind": "inventory_year", "note": "EIA-860 annual inventory; status as of the end of the reporting year", "report_date": "2024-01-01", "year": 2024 }, "precision": 1, "quality": "valid", "source_ref": "pudl-generators", "unit": "MW", "value": 3.5 } ], "generator_id": "HAU9", "id": "generator:eia:2185:HAU9", "is_storage": false, "operator": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "ownership": { "basis": "unknown", "invalid_shares": false, "note": "Ownership not established from source; no share assumed", "shares": [], "unassigned_fraction": null, "unassigned_mw": null, "unknown_reason": "proposed_unit" }, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" }, "resource_group": "hydro", "status": { "category": "proposed", "code": "P", "label": "planned_approvals_not_initiated" }, "storage": null, "technology": "Conventional Hydroelectric" } ], "id": "plant:eia:2185", "interconnection_requests": [], "latest": { "changed_on": "2026-08-01", "changes_since_baseline": [ { "baseline_capacity_mw": 3.5, "baseline_status": "U", "change": "entered_service", "changed_on": "2026-08-01", "generator_id": "HAU10", "latest_capacity_mw": 3.5, "latest_status": "OP", "planned_operating_date": null, "retirement_date": null }, { "baseline_capacity_mw": 3.0, "baseline_status": "OP", "change": "retired_or_cancelled", "changed_on": "2026-08-01", "generator_id": "HAU6", "latest_capacity_mw": 3.0, "latest_status": "RE", "planned_operating_date": null, "retirement_date": "2025-07-01" } ], "edition": { "report_month": "2026-08-01", "source_ref": "eia860m-inventory", "valid_until": "2026-09-01" }, "facts": [ { "basis": "Sum of nameplate MW over generators whose current-valid EIA-860M workbook assertion has status OP; dated by the complete inventory edition; never added to the baseline aggregate", "coverage": { "eligible": 12, "included": 12, "unit": "current and historical generators", "unknown_current_state": 0 }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#latest_nameplate_mw_op", "label": "Operating nameplate capacity, latest inventory", "locator": "Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=2185; report_date=2026-08-01", "maturity": "provisional", "method": "derived", "metric": "latest_nameplate_mw_op", "missing_reason": null, "note": null, "period": { "as_of": "2026-08-01", "kind": "instant", "note": "Complete EIA-860M monthly inventory; assertion dates are not event dates" }, "precision": 1, "quality": "valid", "source_ref": "eia860m-inventory", "unit": "MW", "value": 16.8 }, { "basis": "Sum of nameplate MW over generators whose current-valid EIA-860M workbook assertion is a proposal or construction stage (P, L, T, U, V, OT, TS); a proposal is not a commitment and its date is a forecast", "coverage": { "eligible": 12, "included": 12, "unit": "current and historical generators" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#latest_nameplate_mw_planned", "label": "Planned nameplate capacity, latest inventory", "locator": "Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=2185; report_date=2026-08-01", "maturity": "provisional", "method": "derived", "metric": "latest_nameplate_mw_planned", "missing_reason": null, "note": null, "period": { "as_of": "2026-08-01", "kind": "instant", "note": "Complete EIA-860M monthly inventory; assertion dates are not event dates" }, "precision": 1, "quality": "valid", "source_ref": "eia860m-inventory", "unit": "MW", "value": 7.0 }, { "basis": "Sum of nameplate MW over generators whose current-valid EIA-860M workbook assertion is retired, cancelled or indefinitely postponed (RE, CN, IP); retired is not demolished", "coverage": { "eligible": 12, "included": 12, "unit": "current and historical generators" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#latest_nameplate_mw_retired", "label": "Retired or cancelled nameplate capacity, latest inventory", "locator": "Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=2185; report_date=2026-08-01", "maturity": "provisional", "method": "derived", "metric": "latest_nameplate_mw_retired", "missing_reason": null, "note": null, "period": { "as_of": "2026-08-01", "kind": "instant", "note": "Complete EIA-860M monthly inventory; assertion dates are not event dates" }, "precision": 1, "quality": "valid", "source_ref": "eia860m-inventory", "unit": "MW", "value": 15.299999999999999 } ], "historical_units": [], "in_baseline": true, "last_retirement_date": "2025-07-01", "life": "operating", "next_planned_operating_date": "2028-06-01", "note": "Independently dated by EIA-860M; the baseline facts above stay the validated edition. Planned dates are forecasts; retired is not demolished.", "summary": { "mw_entered_service": 3.5, "mw_retired_or_cancelled": 3.0, "units_entered_service": 1, "units_new_since_baseline": 0, "units_retired_or_cancelled": 1 }, "units": [ { "capacity_mw": 2.8, "changed_on": "2026-08-01", "dates": { "operating": "1911-11-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": "2023-09-01" }, "generator_id": "HAU1", "id": "generator:eia:2185:HAU1", "in_baseline": true, "life": "retired_or_cancelled", "resource_group": "hydro", "status": { "category": "retired", "code": "RE", "label": "retired" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.5, "changed_on": "2026-08-01", "dates": { "operating": "2025-07-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": null }, "generator_id": "HAU10", "id": "generator:eia:2185:HAU10", "in_baseline": true, "life": "operating", "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.5, "changed_on": "2026-08-01", "dates": { "operating": "2021-05-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": null }, "generator_id": "HAU11", "id": "generator:eia:2185:HAU11", "in_baseline": true, "life": "operating", "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.5, "changed_on": "2026-08-01", "dates": { "operating": null, "planned_operating": "2029-12-01", "planned_retirement": null, "precision": "month", "retirement": null }, "generator_id": "HAU12", "id": "generator:eia:2185:HAU12", "in_baseline": true, "life": "planned", "resource_group": "hydro", "status": { "category": "proposed", "code": "P", "label": "planned_approvals_not_initiated" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.9, "changed_on": "2026-08-01", "dates": { "operating": "1911-11-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": "2019-12-01" }, "generator_id": "HAU2", "id": "generator:eia:2185:HAU2", "in_baseline": true, "life": "retired_or_cancelled", "resource_group": "hydro", "status": { "category": "retired", "code": "RE", "label": "retired" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 2.8, "changed_on": "2026-08-01", "dates": { "operating": "1911-11-01", "planned_operating": null, "planned_retirement": "2028-06-01", "precision": "month", "retirement": null }, "generator_id": "HAU3", "id": "generator:eia:2185:HAU3", "in_baseline": true, "life": "operating", "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 2.8, "changed_on": "2026-08-01", "dates": { "operating": "1911-11-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": "2017-11-01" }, "generator_id": "HAU4", "id": "generator:eia:2185:HAU4", "in_baseline": true, "life": "retired_or_cancelled", "resource_group": "hydro", "status": { "category": "retired", "code": "RE", "label": "retired" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 2.8, "changed_on": "2026-08-01", "dates": { "operating": "1911-11-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": "2021-04-01" }, "generator_id": "HAU5", "id": "generator:eia:2185:HAU5", "in_baseline": true, "life": "retired_or_cancelled", "resource_group": "hydro", "status": { "category": "retired", "code": "RE", "label": "retired" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.0, "changed_on": "2026-08-01", "dates": { "operating": "1915-09-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": "2025-07-01" }, "generator_id": "HAU6", "id": "generator:eia:2185:HAU6", "in_baseline": true, "life": "retired_or_cancelled", "resource_group": "hydro", "status": { "category": "retired", "code": "RE", "label": "retired" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.5, "changed_on": "2026-08-01", "dates": { "operating": "2019-05-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": null }, "generator_id": "HAU7", "id": "generator:eia:2185:HAU7", "in_baseline": true, "life": "operating", "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.5, "changed_on": "2026-08-01", "dates": { "operating": "2022-11-01", "planned_operating": null, "planned_retirement": null, "precision": "month", "retirement": null }, "generator_id": "HAU8", "id": "generator:eia:2185:HAU8", "in_baseline": true, "life": "operating", "resource_group": "hydro", "status": { "category": "existing", "code": "OP", "label": "operating" }, "technology": "Conventional Hydroelectric" }, { "capacity_mw": 3.5, "changed_on": "2026-08-01", "dates": { "operating": null, "planned_operating": "2028-06-01", "planned_retirement": null, "precision": "month", "retirement": null }, "generator_id": "HAU9", "id": "generator:eia:2185:HAU9", "in_baseline": true, "life": "planned", "resource_group": "hydro", "status": { "category": "proposed", "code": "P", "label": "planned_approvals_not_initiated" }, "technology": "Conventional Hydroelectric" } ] }, "location": { "city": "Helena", "county": "Lewis and Clark", "datum": null, "lat": 46.765941, "locator": "out_eia__yearly_plants.parquet; report_date=2024-01-01; plant_id_eia=2185", "lon": -111.887341, "note": "Plant coordinate shared by all generators; not turbine or inverter locations. Source datum field empty in this edition.", "quality": "source_reported", "source_ref": "pudl-plants", "state": "MT", "timezone": "America/Denver" }, "name": "Hauser", "operator": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" }, "output": { "annual": [ { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 122257.0, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2015", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2015-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2016-01-01T00:00:00Z", "period_start": "2015-01-01T00:00:00Z", "year": 2015 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 122257.0 }, "rows": 1, "year": 2015 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 120437.0, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2016", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2016-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8784, "kind": "calendar_year", "period_end": "2017-01-01T00:00:00Z", "period_start": "2016-01-01T00:00:00Z", "year": 2016 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 120437.0 }, "rows": 1, "year": 2016 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 130316.99999999999, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2017", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2017-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2018-01-01T00:00:00Z", "period_start": "2017-01-01T00:00:00Z", "year": 2017 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 130316.99999999999 }, "rows": 1, "year": 2017 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 118094.0, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2018", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2018-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2019-01-01T00:00:00Z", "period_start": "2018-01-01T00:00:00Z", "year": 2018 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 118094.0 }, "rows": 1, "year": 2018 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 126084.00000000001, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2019", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2019-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2020-01-01T00:00:00Z", "period_start": "2019-01-01T00:00:00Z", "year": 2019 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 126084.00000000001 }, "rows": 1, "year": 2019 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 114080.0, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2020", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2020-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8784, "kind": "calendar_year", "period_end": "2021-01-01T00:00:00Z", "period_start": "2020-01-01T00:00:00Z", "year": 2020 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 114080.0 }, "rows": 1, "year": 2020 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 116007.99999999999, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2021", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2021-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2022-01-01T00:00:00Z", "period_start": "2021-01-01T00:00:00Z", "year": 2021 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 116007.99999999999 }, "rows": 1, "year": 2021 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 128166.99999999999, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2022", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2022-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2023-01-01T00:00:00Z", "period_start": "2022-01-01T00:00:00Z", "year": 2022 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 128166.99999999999 }, "rows": 1, "year": 2022 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 142769.0, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2023", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2023-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8760, "kind": "calendar_year", "period_end": "2024-01-01T00:00:00Z", "period_start": "2023-01-01T00:00:00Z", "year": 2023 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 142769.0 }, "rows": 1, "year": 2023 }, { "components": [ { "energy_source": { "code": "WAT", "fuel_group": "hydro", "label": "water" }, "maturity": "final", "net_generation_mwh": 134425.0, "prime_mover": { "code": "HY", "label": "hydraulic_turbine" } } ], "fact": { "basis": "Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained", "coverage": { "eligible": 1, "included": 1, "unit": "plant x prime-mover x fuel rows" }, "denominator": null, "evidence": "reported", "fact_id": "plant:eia:2185#net_generation_mwh@2024", "label": "Net generation", "locator": "out_eia923__yearly_generation_fuel_combined.parquet; report_date=2024-01-01; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "missing_reason": null, "note": null, "period": { "hours": 8784, "kind": "calendar_year", "period_end": "2025-01-01T00:00:00Z", "period_start": "2024-01-01T00:00:00Z", "year": 2024 }, "precision": 0, "quality": "valid", "source_ref": "pudl-output", "unit": "MWh", "value": 134425.0 }, "rows": 1, "year": 2024 } ], "monthly": { "available": true, "basis": "Sum of unique plant x prime-mover x fuel rows per month; local calendar months as published by EIA; only years in which the respondent reported monthly (M) or monthly values once per year (AM)", "evidence": "reported", "frequency_sources": { "2023": "pudl-plants", "2024": "pudl-plants" }, "label": "Net generation, monthly", "locator": "out_eia923__monthly_generation_fuel_combined.parquet; plant_id_eia=2185", "maturity": "final", "method": "derived", "metric": "net_generation_mwh", "note": "Missing months absent, not zero; negative values retained; excluded years listed with reason", "period_kind": "calendar_month", "series_id": "plant:eia:2185#net_generation_mwh/monthly", "source_ref": "pudl-output-monthly", "unit": "MWh", "values": [ { "hours": 744, "maturity": "final", "period_end": "2023-02-01T00:00:00Z", "period_start": "2023-01-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11127.0 }, { "hours": 672, "maturity": "final", "period_end": "2023-03-01T00:00:00Z", "period_start": "2023-02-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10382.0 }, { "hours": 744, "maturity": "final", "period_end": "2023-04-01T00:00:00Z", "period_start": "2023-03-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 12748.0 }, { "hours": 720, "maturity": "final", "period_end": "2023-05-01T00:00:00Z", "period_start": "2023-04-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 12299.0 }, { "hours": 744, "maturity": "final", "period_end": "2023-06-01T00:00:00Z", "period_start": "2023-05-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11461.0 }, { "hours": 720, "maturity": "final", "period_end": "2023-07-01T00:00:00Z", "period_start": "2023-06-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10788.0 }, { "hours": 744, "maturity": "final", "period_end": "2023-08-01T00:00:00Z", "period_start": "2023-07-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11682.0 }, { "hours": 744, "maturity": "final", "period_end": "2023-09-01T00:00:00Z", "period_start": "2023-08-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 12868.0 }, { "hours": 720, "maturity": "final", "period_end": "2023-10-01T00:00:00Z", "period_start": "2023-09-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11872.0 }, { "hours": 744, "maturity": "final", "period_end": "2023-11-01T00:00:00Z", "period_start": "2023-10-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11883.0 }, { "hours": 720, "maturity": "final", "period_end": "2023-12-01T00:00:00Z", "period_start": "2023-11-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 12588.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-01-01T00:00:00Z", "period_start": "2023-12-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 13071.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-02-01T00:00:00Z", "period_start": "2024-01-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 13031.0 }, { "hours": 696, "maturity": "final", "period_end": "2024-03-01T00:00:00Z", "period_start": "2024-02-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 12193.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-04-01T00:00:00Z", "period_start": "2024-03-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11948.0 }, { "hours": 720, "maturity": "final", "period_end": "2024-05-01T00:00:00Z", "period_start": "2024-04-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10182.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-06-01T00:00:00Z", "period_start": "2024-05-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10113.0 }, { "hours": 720, "maturity": "final", "period_end": "2024-07-01T00:00:00Z", "period_start": "2024-06-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11841.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-08-01T00:00:00Z", "period_start": "2024-07-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 12783.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-09-01T00:00:00Z", "period_start": "2024-08-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10242.0 }, { "hours": 720, "maturity": "final", "period_end": "2024-10-01T00:00:00Z", "period_start": "2024-09-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 11055.0 }, { "hours": 744, "maturity": "final", "period_end": "2024-11-01T00:00:00Z", "period_start": "2024-10-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10912.0 }, { "hours": 720, "maturity": "final", "period_end": "2024-12-01T00:00:00Z", "period_start": "2024-11-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 10213.0 }, { "hours": 744, "maturity": "final", "period_end": "2025-01-01T00:00:00Z", "period_start": "2024-12-01T00:00:00Z", "quality": "valid", "rows": 1, "value": 9912.0 } ], "years_eligible": [ 2023, 2024 ], "years_excluded": [ { "frequency_code": "A", "reason": "annual_reporter", "year": 2015 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2016 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2017 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2018 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2019 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2020 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2021 }, { "frequency_code": "A", "reason": "annual_reporter", "year": 2022 } ] }, "note": "Sum of unique plant x prime-mover x fuel rows per year; negative values retained; missing years absent, not zero; no monthly curve inferred", "reporter_frequency": "monthly_reported_annually" }, "ownership_paths": { "available": false, "note": "Direct owners and their shares are in ownership_rollup and on each generator; no parent chain is curated for this plant, so no parent-attributed MW exists and none is implied", "reason": "parent_chain_not_curated", "source_ref": "ownership-parents" }, "ownership_rollup": { "basis": "Operating nameplate MW x ownership fraction, once per generator; reported schedule or EIA-860 schedule-4 default", "note": null, "owners": [ { "bases": [ "eia860_schedule4_default" ], "generators": 5, "owned_mw": 16.3, "owner": { "entity_type": "I", "entity_type_label": "Investor-owned utility", "id": "org:eia:13902", "name": "NorthWestern Energy" } } ], "unassigned_mw": 0.0, "unknown_coverage": { "eligible": 0, "included": 0, "unit": "native rows" }, "unknown_mw": 0.0 }, "release_id": "20260929T050546Z-51ae0f7d3c78", "reporting": { "ba": { "code": "NWMT", "id": "ba:eia:NWMT", "name": "NorthWestern Energy" }, "ba_code_source": "NWMT", "frame_role": "ring", "in_geographic_core": true, "in_reporting_frame": true, "inclusion_reason": "ba_in_frame_v1", "membership_review_status": "source", "reporter_frequency": "AM" }, "resource_group": "hydro", "schema_version": "1.41.0", "source_name": null, "sources": [ "ornl-eha-2026", "ornl-hilarri-v4", "pudl-generators", "pudl-output", "pudl-ownership", "pudl-plants", "usace-nid" ], "storage": null, "type": "plant", "updated_reason": null, "water": null }