Projects

INTERMOUNTAIN PUMPED-STORAGE PROJECT

ABOUT THE PROJECT

The Intermountain Pumped Storage Project
would be located 5 miles north east of Delta, and 7 miles west of Oak City, Utah in the Millard County. The project concept envisions the construction of a pumped storage power plant facility with capacity ranging from 1,200 MW to 2,000 MW. The project proposes to use the existing DMAD reservoir as a lower pool and a new reservoir in the Canyon Mountains Range to serve as the upper pool. The proposed Intermountain Pumped Storage Project would operate in a closed loop.

The existing DMAD reservoir dam would need to be raised in order to store an additional water reserve for pumped storage operation. The dam’s raise would also allow for additional water storage to be used for irrigation and water conveyance. Alternatives for an upper reservoir to operate the Intermountain Pumped Storage Power Plant would require the construction of a new embankment to create a new reservoir in the Canyon Mountains east of the existing DMAD Reservoir. The new upper reservoir alternatives are listed below:
  • Upper Reservoir Alternative 1: A new Dry Fork Reservoir at 6,200 ft el.
  • Upper Reservoir Alternative 2: A new Mill Canyon Reservoir at 6,600 ft el.
  • Upper Reservoir Alternative 3: A new Williams Reservoir at 7,140 ft el.
The project proposes interconnection with the existing Intermountain AC Switchyard. The Intermountain Pumped Storage Power Plant would interconnect to the Intermountain AC Switchyard using two new 345 kV transmission lines. In order to deliver the generated power to the regional electrical utility network, the following transmission paths are available:
  • Transmission Path 1 (California Path 27) which transmits power to Adelanto, CA through the existing 500 kV DC transmission line.
  • Transmission Path 2 (Utah Path 28) which transmits power to Mona through the existing 345 kV transmission lines to the east.
  • Transmission Path 3 (Nevada Path 29) which transmits power to Ely, NV through the existing Gonder IPP 230 kV transmission line.
The Intermountain PS Project would be most attractive to the Intermountain Power Agency, due to the proposed use of their existing resources in the area. Additionally, other electrical utilities in California and Nevada are expected to be interested in the project as a resource for storing and maximizing renewable energy use.

HAIWEE PUMPED-STORAGE PROJECT

ABOUT THE PROJECT

The proposed Haiwee Pumped Storage Project would be located 10 miles south of Olancha, California in the Inyo County. The project concept envisions the construction of a pumped storage power facility with capacity ranging from 1,200 MW to 2,000 MW. The project proposes a new North Haiwee Reservoir 2 located upstream North Haiwee Reservoir to serve as a lower pool. Alternatives for an upper pool to operate the Haiwee Pumped Storage Power Plant require the construction of a new embankment to create a new reservoir to the west or east of the proposed North Haiwee Reservoir 2. The new upper reservoir alternatives are the following:
  • Upper Reservoir Alternative 1: A new Coso Range Reservoir at 6,670 ft el.
  • Upper Reservoir Alternative 2: A new Coso Range Reservoir at 5,540 ft el.
  • Upper Reservoir Alternative 3: A new Sage Flats Reservoir at 5,235 ft el.
The proposed North Haiwee Reservoir 2 would improve the seismic reliability of the existing North Haiwee Reservoir. Seismic studies have found the existing North Haiwee Reservoir could potentially fail during a maximum credible earthquake. In that event, the dam’s crest could settle and cause the release of a large volume of water. This event could threaten public safety due to the potentially hazardous flooding. The new dam would act as a backup dam to ensure safety of the populations and improve reliability of the existing North Haiwee Reservoir for water conveyance.

Considering the existing LA Aqueduct and the project’s site land are owned and operated by Los Angeles Department Water and Power (LADWP), the project would be most attractive to LADWP due to their footprint and existing resources in the area. The filling of the reservoirs would be carried out by using the water conveyed through the existing LA Aqueduct. The development of this proposed project would be done under LADWP’s supervision. Additionally, other electrical utilities are expected to be interested in the project as a resource for storing renewable energy.


OWENS VALLEY PUMPED STORAGE PROJECT #1

ABOUT THE PROJECT

The Owens Valley Pumped Storage Hydro Project #1 will deliver up to 2,000 MW of clean, renewable energy to California’s electrical utility network. The project’s proposed hydro power plant would harness renewable energy in the form of wind or solar energy when demand is low. By pumping the water from a lower reservoir to an upper reservoir, excess energy would be stored as potential energy of the water. The stored water can then be used again to generate electricity during hours of high demand and low renewable energy production.

In order to contribute to California’s efforts to achieve 100% renewable energyPremium Energy has perceived a valuable opportunity in the Owens Valley of Eastern California for the construction of a pumped storage hydro project. The project’s power plant is proposed to be a cavern-type, located underground. The powerhouse would be located about half mile from the proposed lower reservoir shore. The powerhouse would have an access tunnel, and it would be connected to a headrace and a tailrace pressure tunnel. The project’s main features will be located underground and will not alter the existing landscape, thus reducing environmental disturbances. Furthermore, the Owens Valley Pumped Storage Project #1 would operate in a closed loop, meaning the project’s operation would not alter the existing streams flow.

The proposed Owens Valley Pumped Storage Project #1 would be an environmentally friendly alternative to a battery energy storage system. Storing and reusing renewable energy in a cyclic manner, the project would help reduce fossil fuel power generation and the CO2 emissions linked to it. The proposed Power Plant would be able to generate between 1,200 MW and 2,000 MW of electrical power. The project’s transmission lines would tentatively interconnect with Los Angeles Department of Water and Power (LADWP) AC or DC transmission system.

PROJECT LOCATION

The project’s location would be in the Owens Valley of Eastern California, between the Mono county and the Inyo county, 5 miles away from Bishop. The Owens Valley Pumped Storage Project #1 would make use of nearly 3,920 ft of available head between the White Mountains in the Inyo county and the Owens Valley floor. The high head over the relatively short distance of the site, makes it a feasible option for a pumped storage power plant’s efficiency, as well as its economic viability.

BENEFITS

The Owens Valley Pumped Storage Project #1’s main benefits come from its proposed flexible and prompt availability to generate electricity from renewable resources. The project envisions the following benefits for the state:

  • Promote the state’s carbon-free electricity goals by providing at least 1,200 MW of clean energy.
  • Compensate the retirement of fossil and nuclear generation.
  • Reduce greenhouse gas emissions associated to fossil fuel and nuclear power generation.
  • Provide balance for intermittent renewable energy sources like wind and solar.

PYRAMID LAKE PUMPED STORAGE PROJECT #1

ABOUT THE PROJECT

The Pyramid Lake Pumped Storage Project envisions the construction of a pumped storage power plant facility with capacity of 2,000 MW. The project proposes to use the existing Pyramid Lake as a lower pool and a new reservoir in the Lake Range to serve as the upper pool. A hydraulic head of up to 2,900 ft would exist between the new upper reservoir and the Pyramid Lake, which would be exploited for hydro power generation.

Alternatives for an upper reservoir to operate the Pyramid Lake Pumped Storage Power Plant would require the construction of a new embankment to create a new reservoir in the Lake Range east of the existing reservoir. The new upper reservoir alternatives are listed below:

  • Upper Reservoir Alternative 1: A new San Emidio Reservoir at 6,700 ft el.
  • Upper Reservoir Alternative 2: A new Tohakum Peak Reservoir at 5,960 ft el.
  • Upper Reservoir Alternative 3: A new Lake Range Reservoir at 6,180 ft el.

The proposed Pyramid Lake Pumped Storage Project is expected to have a nominal capacity of 2,000 MW. The interconnection voltage would be 500 kV. The project would interconnect with the existing PDCI and transmit the power to Los Angeles, California. The interconnection of the Pyramid Lake Switchyard to the PDCI will require a new Pyramid converter station. From there, the power would be transmitted through an upgraded segment of the PDCI to a Rebuilt Sylmar Converter Station West.

In order to store renewable energy and maximize pumped storage operation, the project proposes a new solar PV farm in the northern or southern shore of the Pyramid Lake. The proposed solar farm would use 14,000 acres of land for the installation of solar panels. The solar farms would generate 2,000 MW of solar PV energy. This energy would be produced and stored during low-demand hours. The Pyramid Lake Pumped Storage Project would then be able to generate 2,000 MW of carbon free electricity when demand is high. Additionally, the project could tentatively interconnect to the existing Windhub Substation for storing wind energy. Other electrical utilities in California and Nevada are also expected to be interested in the project.

PROJECT LOCATION

The proposed Project would be located 40 miles northeast of Reno, Nevada in the Washoe County. The lower reservoir for the project would be the existing Pyramid Lake, located in the southeast of Washoe county in Western Nevada. The lake is surrounded by the Lake Range on the east and the Virginia Mountains on the west. Pyramid Lake is the discharge point of the Truckee River, which is the sole outlet of Lake Tahoe. The project's upper reservoir alternatives are proposed in the Lake Range east of the Pyramid Lake. The upper reservoir would be created in either the San Emidio Canyon or near the Tohakum Peak.

BENEFITS

  • Provide 2,000 MW of clean energy to California’s electrical grid.
  • Help meet California’s goal to reach 100% renewable energy by 2045.
  • Reduce CO2 emissions and the use of fossil fuel energy sources.
  • Load balancing for intermittent renewable energy sources.
  • Environmentally friendly alternative for BESS.
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