Power Supply and Delivery
Most of the electricity we provide to customers comes from several utility-owned hydroelectric resources located in the Pacific Northwest. To make up the difference, we purchase any additional power needed from other energy providers.
City Light Energy Resources
Map Key:
City Light owned hydropower
Treaty rights from British Columbia
Long-term hydropower contracts (CBH is Columbia Basin Hydropower)
Other long-term contracts
To maintain our carbon-neutral status, we purchase Renewable Energy Credits (RECs) to offset carbon from energy purchased from other providers. We also invest in energy conservation that minimizes electricity demand.
How Your Energy Gets to Your Home or Business
Electricity is delivered to your home or business through our extensive network of transmission towers, substations, and distribution lines.
Power Transmission and Distribution
- Power is generated from the dam and powerhouse
- Substation transformer steps up the voltage for transmission
- Transmission lines carry electricity long distances
- Neighborhood substation transformer steps down voltage
- Distribution lines carry electricity to residents
- Transformers on poles step down electricity before entering residence
- Service lines deliver power from the pole to the residence