World Power Plants

Helms Pumped Storage1,053 MW Hydroelectric

HydroRenewableVerified: Jul 2026

Helms Pumped Storage is an impressive hydroelectric power generation facility located in the United States of America at coordinates 37.0293, -118.9683. With a capacity of 1,053 MW, this plant serves a crucial role in energy generation and grid management. Commissioned in 1984 and operated by Pacific Gas & Electric Co., Helms Pumped Storage utilizes advanced pumped storage technology that allows it to efficiently store and generate energy. This technology involves pumping water to an upper reservoir during periods of low electricity demand and releasing it to generate power when demand peaks. The strategic location of Helms Pumped Storage enhances its operational effectiveness, allowing it to provide essential grid support and stability in a region that relies heavily on both renewable and traditional energy sources. As the United States continues to integrate more renewables into its energy mix, the importance of energy storage facilities like Helms cannot be overstated. They are essential for balancing supply and demand, ensuring that renewable energy generation is complemented by reliable and responsive energy sources. The operational context of Helms Pumped Storage reflects the broader trends in U.S. energy policy, which is increasingly focused on sustainability and the efficient use of resources in the transition towards a cleaner energy future.

Capacity
1,053 MW

1.05 GW

Commissioning Year
1984

42 years old

Owner
Pacific Gas & Electric Co.
Location
37.0293°, -118.9683°

United States of America, North America

Context & rankings
  • 370. largest of 10,098 plants in United States of America
  • #2,302 worldwide by installed capacity
  • #323 of 8,493 Hydroelectric plants worldwide
  • 0.07% of the installed capacity of United States of America
Age & fleet comparison

42 years in operation

Hydroelectric fleet average: 42.1 years

Operator portfolio

Pacific Gas & Electric Co. operates 81 plants totalling 7,669 MW

Regional density

69 plants within 100 km, 2,411 MW combined

Nearest plant: Haas (12.2 km)

Location

Coordinates:: 37.029300, -118.968300
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Helms Pumped Storage is a hydro power plant producing approximately 3690 GWh of clean electricity per year with zero direct CO₂ emissions during operation.

Lifecycle emissions: ~24 g CO₂/kWh (manufacturing, transport, decommissioning)

Technical Details

Primary Fuel Type
Hydro
Energy Source
Renewable
Country
United States of America
Continent
North America
Data Source
Global Power Plant Database

Helms Pumped Storage Power Plant: A Key Hydro Energy Facility in the USA

The Helms Pumped Storage Power Plant, located in California, USA, is a significant facility in the realm of renewable energy generation. Commissioned in 1984 and operated by Pacific Gas & Electric Co., this pumped storage hydroelectric plant has a total capacity of 1053 megawatts (MW). It plays a critical role in balancing supply and demand within the electrical grid, providing both energy storage and peak load generation capabilities. As a hydroelectric power plant, Helms utilizes the gravitational potential energy of water to generate electricity, making it an essential component of the country's efforts to transition to cleaner energy sources.

Pumped storage works by utilizing two water reservoirs at different elevations. During periods of low electricity demand or excess generation, excess energy is used to pump water from the lower reservoir to the upper reservoir. When demand increases, the stored water is released back down through turbines, generating electricity. This cyclical process allows Helms to act as a large-scale battery, storing energy when it is plentiful and releasing it when needed. The plant’s ability to respond quickly to fluctuations in electricity demand makes it an invaluable asset in maintaining grid stability and reliability, particularly in a region where renewable sources like solar and wind are becoming more prevalent.

In terms of its environmental impact, Helms Pumped Storage leverages hydroelectric power, which is one of the cleanest forms of energy generation. It produces no direct emissions during operation, contributing to a reduction in greenhouse gas emissions compared to fossil fuel-based power plants. However, it is important to acknowledge the potential ecological effects associated with the construction and operation of such facilities, including impacts on local ecosystems, water quality, and fish populations. The management of these environmental considerations is critical for the sustainable operation of the plant and the surrounding region.

Regionally, the Helms Pumped Storage Power Plant is significant not only for its energy contributions but also for its role in supporting the California electricity market. As the state continues to face challenges related to energy demand, climate change, and the integration of intermittent renewable resources, facilities like Helms become increasingly vital. They enable the efficient use of renewable energy, support grid resilience, and help avoid blackouts during peak demand periods.

Overall, the Helms Pumped Storage Power Plant exemplifies the potential of hydroelectric energy to provide reliable, clean, and flexible electricity generation. As the United States continues to pursue a more sustainable energy future, the importance of such facilities will only grow, highlighting the need for continued investment in and development of renewable energy infrastructure.

United States of AmericaEnergy Profile

10,098
Total Plants
1420.7 GW
Total Capacity
GasCoalNuclearWind
Top Fuels

See Incorrect or Missing Data?

Help us improve our database by reporting any corrections or updates. Your contribution helps keep our global power plant data accurate and up-to-date.