March 2026 delivered core RUS data platform enhancements and reliability improvements for PUDL, with a focus on robust analytics and data integrity. Key features include: (1) RUS Data Model Expansion for Plant Costs and Borrower Normalization, introducing new tables, schema migrations, and foreign key constraints to enable borrower/plant-level transformations and normalized borrower names; (2) RUS Reporting Outputs and Integration, adding output tables for RUS-7/12 with metadata and validations and integrating the last four RUS tables into the schema; (3) comprehensive validation and metadata coverage via dbt-style validations and improved field definitions across the RUS tables; and (4) migration hygiene and documentation updates, including Alembic migration fixes and release notes. Major bug fix: Employee Hours Reporting Threshold adjusted to better reflect actual data, improving overtime and reporting accuracy. Overall, these efforts enhanced data quality, enabled richer regulatory/compliance reporting, and strengthened end-to-end data pipelines from ingestion to reporting, leveraging SQL, Alembic migrations, and data transformation tooling while fostering cross-team collaboration.

February 2026 monthly summary for catalyst-cooperative/pudl. Delivered significant enhancements to the RUS7 energy reporting data model, completed multi-phase table transformations and publications, fixed critical data quality issues, and strengthened release governance. This period focused on delivering business value through improved energy reporting readiness and scalable data infrastructure.

January 2026 monthly summary for catalyst-cooperative/pudl. Delivered two major data integration efforts: EIA-860M data integration for November 2025 and RUS7 data extraction enhancements, expanding coverage to ten tables. Improved data quality and reporting integrity through updated mappings, schema refinements, and bug fixes. Release notes updated and IDs mapped; collaboration with Austen Sharpe on co-authored PRs; data archiving notes included for 2006 data. Tech stack strengthened: ETL design, data modeling, column mapping, and governance practices, enabling faster, more reliable analytics for EIA/RUS reporting.

December 2025 monthly summary for catalyst-cooperative/pudl. Delivered EIA-860m dataset integration for October 2025 with schema enhancements, added a planned repower date column, fixed a tech type issue, and updated row counts/mappings to ensure ETL compatibility. Reverted a plant_parts row count change to restore data integrity. Overall, improved data quality, ETL reliability, and readiness for faster future ETLs across datasets.

November 2025 monthly summary for pudl (Month: 2025-11): Focused on delivering the EIA 861 2024 data update for the pudl repository and refining the extraction pipeline to produce accurate, analysis-ready data for downstream analytics and reporting.

Monthly summary for 2025-10: Delivered a feature to standardize the EIA860 CSV structure in the pudl repository by restructuring extraction CSVs to transpose formats and align headers/rows, enabling consistent data processing and analysis across files. This work establishes a robust foundation for scalable ETL and downstream analytics in PUDL.

September 2025 monthly summary for catalyst-cooperative/pudl: Focused on data integrity improvements for FERC-1 yearly detailed datasets. Implemented a targeted bug fix to remove rare utility type subdimensions to prevent data loss in out_ferc1__yearly_detailed_* tables. The change involved introducing remove_rare_utility_type_subdimensions_rows, updating CSV row counts, and adding release notes/documentation. This work enhances data reliability for downstream analytics and reporting, reducing risk of incorrect conclusions from corrupted yearly FERC-1 data. Commits and traceability maintained with hash 09d8efa7d78baae6c247b314db76de01d75855a7.

August 2025 monthly summary focused on expanding data coverage, improving data quality, and enabling a broader data source footprint in PUDL. Delivered three core features with concrete business value: historical PHMSA data extraction enhancements, an updated EIA-923 dataset with deduplication fixes, and new EIA API data source documentation and integration. These efforts improve data completeness, accuracy, and accessibility for analytics and reporting, while streamlining release management and documentation workflows.

July 2025 monthly summary for catalyst-cooperative/pudl focusing on business value and technical execution. Highlights include delivering a new data source integration, a comprehensive metadata management overhaul, and a targeted data quality fix that improves reliability for downstream analytics and reporting. The work demonstrates improved data discoverability, maintainability, and cross-team collaboration across data engineering, metadata governance, and documentation.

May 2025 monthly summary for the Pudl repository focused on delivering business value through data integration, data quality improvements, and CI efficiency. The month culminated in a major data ingestion feature, a critical bug fix for heat rate calculations, and CI/test optimizations, all enabling more reliable analytics and regulatory-ready data.

April 2025 monthly summary focused on delivering self-contained data integrity improvements and archiver reliability across pudl and pudl-archiver. Key outcomes include replacing an external FIPS handling dependency with a custom, Census-based integration; enhancing census data archival and CI coverage; and improving XBRL archiver robustness through deterministic serialization and test alignment. These efforts reduce external risk, improve data consistency, and strengthen CI/test reliability for data extraction, transformation, archiving, and reporting pipelines.

Concise monthly summary for 2025-03 focusing on stability, accuracy, and reliability across two repositories (pudl and pudl-archiver). Key improvements include: (1) Release Notes: EIA 860 Multifuel table PR reference correction and contributor acknowledgment, ensuring accurate historical records and proper credit; (2) API compatibility fix in CensusPepArchiver to handle get_hyperlinks returning a dict instead of a list, preserving per-year file processing and preventing runtime failures due to API changes. These changes reduce operational risk, improve data integrity, and reinforce automation reliability for release management and archival workflows.

February 2025 performance summary: Across pudl-archiver and pudl, delivered key features that expand data coverage and simplify maintenance, while hardening ingestion pipelines for reliability and scalability. Major outcomes include: unified NREL ATB archiver logic with parity across electricity and transportation datasets; expanded EIA MECS archiver robustness; ingestion of Q4 2024 EPA CEMS data with updated metadata and release notes; and introduction of three detailed FERC1 accounting output tables with supporting migrations and metadata. The work reduces data gaps, minimizes ingestion errors, and enables richer downstream analytics for stakeholders.

January 2025 monthly summary for pudl and pudl-archiver. Focused on expanding metadata coverage, stabilizing archiving workflows, and delivering data governance improvements that boost discoverability, provenance, and automation. Key activities include metadata integrations across major datasets, development of a census FIPS codes archiver, enhancements to multi-year archiving, and improvements to CI/automation for published archives.