Company: SREA
Filing Date: 2025-02-25
Form Type: 10-K
Source: 0001032208-25-000012
Chunk: 69

Company: SEMPRA
Filing Date: 2025-02-25
Form: 10-K
Item: Item 1A
Chunk 69
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 distributions, strategic planning and other important corporate issues and actions, including limited representation on the Oncor Holdings and Oncor boards of directors. Because Oncor Holdings and Oncor are managed independently (i.e., ring-fenced), we account for our 100% ownership interest in Oncor Holdings as an equity method investment.

Electricity Transmission. Oncor’s electricity transmission business is responsible for the safe and reliable operations of its transmission network and substations. These responsibilities consist of the construction, maintenance and security of transmission facilities and substations and the monitoring, controlling and dispatching of high-voltage electricity over its transmission facilities in coordination with ERCOT, which we discuss below in “Regulation – Utility Regulation – ERCOT Market.” 

At December 31, 2024, Oncor’s transmission system included approximately 18,324 circuit miles of transmission lines, a total of 1,288 transmission and distribution substations, and interconnection to 192 third-party generation facilities totaling 58,597 MW. 

Transmission revenues are provided under tariffs approved by either the PUCT or, to a small degree related to limited interconnection to other markets, the FERC. Network transmission revenues compensate Oncor for delivery of electricity over transmission facilities operating at 60 kV and above. Other services offered by Oncor through its transmission business include system impact studies, facilities studies, transformation service and maintenance of transformer equipment, substations and transmission lines owned by other parties. 

Electricity Distribution. Oncor’s electricity distribution business is responsible for the overall safe and reliable operation of distribution facilities, including electricity delivery, power quality, security and system reliability. These responsibilities consist of the ownership, management, construction, maintenance and operation of the electricity distribution system within its certificated service area. Oncor’s distribution system receives electricity from the transmission system through substations and distributes electricity to end-users and wholesale customers through 3,757 distribution feeders at December 31, 2024.

Oncor’s distribution system included more than four million points of delivery at December 31, 2024 and consisted of 125,975 circuit miles of overhead and underground lines.

Distribution revenues from residential and small business users are generally based on actual monthly consumption (kWh) and distribution revenues from large commercial and industrial users are based on, depending on size and annual load factor, either actual monthly demand (kW) or the greater of actual monthly demand (kW) or 80% of peak monthly demand during the prior eleven months. 

Customers and Demand. Oncor