# Quality report

- Coverage: EIA final data for 2001-2025 (state generation), 2001-2024 (State Electricity Profile Table 10; 2025 not yet published), and 2025 (EIA-860 and EIA-923 final).
- Cross-check: EIA's State Historical Tables and the Washington State Electricity Profile Table 10 agree on total net generation within 4 MWh in all 24 overlapping years.
- Source digests: archive_source fetched each EIA file and returned the same SHA-256 as the local downloads in source-manifest.json.
- Grand Coulee capacity: the EIA-860 nameplate total (6,809 MW) matches Reclamation's published 6,809 MW. Net summer capacity (7,079 MW) is higher than nameplate and higher than the 6.7 GW in an EIA Today in Energy article; both are reported.
- Grand Coulee generation: 2025 plant total 16,151,147 MWh. Its pumped-storage row (-2,637 MWh) equals the Washington pumped-storage total in the state table.
- Missing values: an energy source absent from EIA's state file for a year has no row in wa-generation-by-source.csv; it is not zero-filled.
- Commerce fuel mix: transcribed from chart labels; they sum to 100.02% because of rounding.
- Wayback Machine captures were attempted with archive_source; sources without an archiveUrl could not be captured at authoring time (the Wayback Machine timed out or rate limited).