CPUC staff outline SB 884 project-data template, require RRU IDs and two alternative mitigations

California Public Utilities Commission staff on May 30 presented a draft data template and guideline for SB 884 electrical undergrounding project lists and fielded stakeholder questions about identifiers, backcasting and how the ICE reliability calculator will be used.

The template requires a Risk Reporting Unit (RRU) identifier, an OEIS project ID and an "undergrounding alternative mitigation" field as primary keys linking tables that collect project characteristics, cost breakdowns, risk-model change history and reliability monetization inputs. Staff said each RRU row must be submitted for the undergrounding mitigation and for each of two alternative mitigations, producing three rows per RRU for comparative analysis.

The requirement matters because it is intended to make utility submissions traceable, auditable and comparable across phase 2 applications and subsequent progress reports, CPUC staff said. The template also includes fields for backcasted values so progress-report numbers can be compared to what would have been reported under the RRU structure at the time of the original filing.

CPUC staff framed the template as aligning with the risk‑based decision (RDF) proceeding and Energy Safety guidance. Matthew Rapelson,…