SB 1221 Gas Distribution Cost Data

Background

Gas Distribution Infrastructure Replacement Backgrounder

This backgrounder provides high-level information about gas distribution infrastructure replacement and its costs. 

Cost data provided by utilities to the CPUC:

These detailed cost documents are presented here as they were submitted to the CPUC by the gas utilities. They include revisions to the documents that utilities provided to the R.24-09-012 service list on November 5, 2025.

If you have questions about the data linked here, please direct them to the utility contacts found in the Cover Descriptions. 

Pacific Gas & Electric 

• Distribution Replacement Costs Data (xlsx)
• Regulator Station Replacement Costs Data (xlsx)
• Maintenance Costs (xlsx)
• Cover Description (pdf) (availability pdf) (update pdf) (availability update)

Southern California Gas Company

• Distribution Replacement Costs Data (xlsx)
• Regulator Station Replacement Costs Data (xlsx)
• Maintenance Costs (xlsx)
• Cover Description (pdf) (availability pdf) (update pdf)

San Diego Gas & Electric

• Distribution Replacement Costs Data (xlsx)
• Regulator Station Replacement Costs Data (xlsx)
• Maintenance Costs (xlsx)
• Cover Description (pdf) (availability pdf)  

Southwest Gas

• Distribution Replacement Costs Data, redacted (pdf)
• Maintenance Costs (xlsx)
• Confidentiality Motion (pdf)
• Cover Description (pdf) 

CPUC cost data direction to utilities:

• September 23, 2025 Templates (corrected October 14, 2025)
  • Distribution Replacement Costs Data - Template (xlsx)
  • Regulator Station Replacement Costs Data - Template (xlsx)
  • Maintenance Costs - Template (xlsx)
  • See Cost Data Ruling
• Correction: "Average cost of service-only replacement activities, per mile of main" should read "Average cost of service-only replacement activities, per mile of service."