Company: SREA
Filing Date: 2025-02-25
Form Type: 10-K
Source: 0001032208-25-000012
Chunk: 149

Company: SEMPRA
Filing Date: 2025-02-25
Form: 10-K
Item: Item 1
Chunk 149
---
 lines. These electric facilities are primarily in the San Diego, Imperial and Orange counties of California, and in Arizona and Nevada and consisted of 2,021 miles of transmission lines, 24,149 miles of distribution lines and 159 substations at December 31, 2024. Occasionally, various areas of the service territory require expansion to accommodate customer growth and maintain reliability and safety. 

SDG&E’s 500-kV Southwest Powerlink transmission line, which is shared with Arizona Public Service Company and Imperial Irrigation District, extends from Palo Verde, Arizona to San Diego, California. SDG&E’s share of the line is 1,163 MW, although it can be less under certain system conditions. SDG&E’s Sunrise Powerlink is a 500-kV transmission line constructed by SDG&E and operated by the California ISO. Both of these lines together provide SDG&E with import capability of 3,900 MW of power.

2024 Form 10-K  |  13

Table of Contents

Mexico’s Baja California transmission system is connected to SDG&E’s system via two 230-kV interconnections with combined capacity of up to 600 MW in the north-to-south direction and 800 MW in the south-to-north direction. However, it can be less under certain system conditions.

SDG&E’s system is connected to Edison’s transmission system via five 230-kV transmission lines.

Electric Resources. SDG&E supplies power from its own electric generation facilities and procures power on a long-term basis from other suppliers for resale through CPUC-approved PPAs or purchases on the spot market. SDG&E does not earn any return on commodity sales volumes. SDG&E’s electric resources at December 31, 2024 were as follows: 

ELECTRIC RESOURCES(1)Contract expiration dateNet operating capacity (MW)% of totalSDG&E:Owned generation facilities, natural gas(2)1,204 24 %PPAs:Renewable energy:Wind2025 to 2042918 19 Solar2030 to 20421,526 31 Other2025 and thereafter155 3 Tolling and other2025 to 20421,113 23 Total4,916 100 %

(1)    Excludes approximately 367 MW of energy storage owned and approximately 632 MW of energy storage contracted.

(2)    SDG&E owns and operates four natural gas-fired power plants,