- Docket Number
- 1,060 MW
- Monterey County
- Simple Cycle
- Project Status
- Operational (Natural Gas-Fired)
- Project Type
- Application for Certification
The Moss Landing Power Plant Project (MLPP) located at the intersection of Highway 1 and Dolan Road, east of the community of Moss Landing near the Moss Landing Harbor, Monterey County, at the existing Moss Landing Power Plant site.
MLPP is a two unit, 1,060-megawatt (MW) natural gas-fired, combined cycle facility (separate from the original seven units) consisting of two natural gas-fired combustion turbine generators, two unfired heat recovery steam generators and a reheat, condensing steam turbine generator. Both units use seawater for once-through cooling.
The Moss Landing facility was originally built and owned by Pacific Gas & Electric, beginning commercial operation in 1950.
- In 1998, PG&E sold the facility to Duke Energy North America (Duke Energy).
- In 2006, Duke Energy sold the plant to LS Power (LSP) Moss Landing LLC, a subsidiary of LSP General Finance Co. LLC.
- In April 2007, the power plant was purchased by Dynegy Moss Landing, LLC (DML), a subsidiary of Dynegy of Houston, Texas.
- On April 9, 2018, Vistra Energy merged with Dynegy and in 2020, Dynegy Moss Landing, LLC underwent an administrative name change to Moss Landing Power Company, LLC.
In October 2014, DML entered a Settlement Agreement with the California State Water Resources Control Board addressing requirements under the SWRCB's Water Quality Control Policy on the Use of Coastal and Estuarine Water for Power Plant Cooling. Paragraph 2.1.6.d in the Settlement Agreement states, "by December 31, 2016, Dynegy Moss Landing, LLC will install and operate variable speed drive controls on circulating water pumps serving Units 1 and 2."
On September 19, 2016, the California Energy Commission approved a Post-Certification Amendment (TN 213710) to allow the installation and operation of variable speed drive (VSD) controls on four of the six existing 4,160 Volt AC motors for the six circulating water pumps serving Units 1 and 2. The VSDs will allow the plant to reduce circulating water flow when the units are not operating at full capacity by automatically matching motor speed to specific unit cooling load demands and allow greater control in reducing cooling water flow during certain unit loads that will reduce entrainment and impingement of marine organisms.
Power Plant Certification and Exemption Processes
As required by the Warren-Alquist Act, the Energy Commission monitors Commission-certified energy projects throughout construction, operation, and closure to ensure compliance with the conditions of certification imposed by the Commission’s Final Decision for approving the projects.