core_ferc1__yearly_depreciation_summary_sched336
Annual time series of depreciation and amortization of electric plant.
- Most-recent data:
2025
- Processing:
Data has been cleaned and organized into well-modeled tables that serve as building blocks for downstream wide tables and analyses.
- Source:
FERC Form 1 -- Annual Report of Major Electric Utilities (Schedule 336 - Section A)
- Primary key:
utility_id_ferc1, report_year, plant_function, ferc_account_label
Usage Warnings
Some columns contain subtotals; use caution when choosing columns to aggregate.
FERC data is notoriously difficult to extract cleanly, and often contains free-form strings, non-labeled total rows and lack of IDs. See Notable Irregularities for details.
Additional Details
Electric Plant refers to FERC Accounts 403, 404, and 405. This table only contains information from Section A: Summary of depreciation and amortization changes.
Columns
Identifier indicating original FERC Form 1 source record. format: {table_name}_{report_year}_{report_prd}_{respondent_id}_{spplmnt_num}_{row_number}. Unique within FERC Form 1 DB tables which are not row-mapped.
Four-digit year in which the data was reported.
PUDL-assigned utility ID, identifying a FERC1 utility. This is an auto-incremented ID and is not expected to be stable from year to year.
Functional role played by utility plant (steam production, nuclear production, distribution, transmission, etc.).
Long FERC account identifier derived from values reported in the XBRL taxonomies. May also refer to aggregations of individual FERC accounts.
Actual FERC Account number (e.g. '359.1') if available, or a PUDL assigned ID when FERC accounts have been split or combined in reporting.
Dollar value of reported income, expense, asset, or liability.
Listing of utility plant types. Examples include Electric Utility, Gas Utility, and Other Utility.
Indicates whether the value reported in the row is calculated, or uniquely reported within the table.