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Calpine Corporation and Bechtel Enterprises, Inc.

General Description

The proposed Delta Energy Center will have a nominal capacity of 880 megawatt (MW). The combined cycle facility will burn natural gas.

Project Location

The Delta Energy Center is proposed to be located on an undeveloped 20-acre parcel at the Dow Chemical Company facility generally north and west of the adjacent Delta Diablo Sanitation District treatment facility. The site is south of the Burlington Northern Santa Fe Railroad, west of the Delta Diablo Sanitation District, north of the Pittsburg Highway and east of Loveridge Road. Project Maps.

Project Cost

Calpine/Bechtel estimates the capital cost of the Delta Energy Center at approximately $350-450 million. The project will contribute to the local economy by employing about 405 workers during peak construction and about 24 permanent jobs during plant operations.

Permitting Process

The California Energy Commission is responsible for permitting the proposed project. The Energy Commission will carefully examine public health and safety, environmental impacts and engineering aspects of the proposed power project including all related facilities such as electric transmission lines, natural gas pile lines, and water lines. The Energy Commission's responsibilities are similar to those of a lead agency under the California Environmental Quality Act (CEQA).

The permitting process is open to the public and includes input from the public and all interested parties. The Energy Commission will be working in close consultation with local, state and federal agencies for their input and analysis of the potential impacts of the project. The review process was initiated on December 18, 1998, when Calpine/Bechtel submited an Application for Certification (AFC) to the Energy Commission for the Delta Energy Center. The Energy Commission's licensing process and decision on the project is expected by February 2000.

Construction Schedule

Calpine/Betchel anticipates starting construction during the first quarter 2000 and completing during the first quarter 2002.

Operation Schedule

Calpine anticipates beginning commercial operation during the second quarter, 2002.

Electricity Sales

Electrical energy produced from the proposed power plant will be sold in California's newly created electricity market. In addition, 20 MW will be sold to Dow Chemical under contract.

Facility Operation

Calpine expects the project to have an overall availability of between 92 and 98 percent. Since the project will be selling electricity into the emerging California market, the plant will be designed to provide electricity during peak load periods as well as operate as an intermediate or baseload or load following facility.

Project Design

The combined cycle design consists of three combustion turbine generators (CTGs), three heat recovery steam generators (HRSGs) with duct burners and a steam turbine generator (STG). Each CTG will produce approximately 200 MW of electricity. The CTG's exhaust gases will be used to generate steam in the HRSGs. The HRSGs will be reheat design with duct firing. Steam from the HRSGs will be admitted to a condensing steam turbine for an additional 300 MWs of electrical power generation. Natural gas will be the fuel for both the CTGs and HRSG duct burners.

The plant will provide 200,000 lbs/hr of saturated steam and about 20 MW of electricity to Dow Chemical. The saturated steam will be supplied to Dow Chemical in a 0.7 mile above ground insulated carbon steel pipeline. Condensate will be returned in an uninsulated pipe carried on the same structures.

Electric Transmission Line

A new 3.3-mile, 230 kilovolt (kV) electric transmission line is proposed. This line will interconnect to the electric transmission system at the existing PG&E substation near the Pittsburg Power Plant. The line will be above ground as it runs in front of US POSCO, then will transition to underground along 8th street. An 0.8-mile underground 13.8 kV line will be built to supply electricity to Dow Chemical.

Natural Gas Fuel Line

A new 5.3-mile natural gas pipeline will be constructed to provide fuel for the project. The 16 inch gas pipeline will be placed in the existing Dow Chemical right-of-way along the Santa Fe Railroad and will connect to PG&E's Antioch natural gas terminal.

Emission Controls

Selective Catalytic Reduction (SCR) will be used to control Nitrogen Oxide (NOx) emissions to 2.5 parts per million by volume dry (ppmvd) at 15 percent oxygen from the gas turbines and 9 ppmvd at 3% oxygen from the auxilary boilers. The SCR will use anhydrous ammonia and a precious metal catalyst to convert NOx molecules into nitrogen and water. Each HRSG's exhaust to the atmosphere will be through 144-foot tall exhaust stacks.

Water Supply

Secondary-treated wastewater from Delta Diablo Sanitation District will be used in the cooling towers. Additional treatment of the water to comply with the requirements of the Department of Health Services will be done on site. A new pipeline, about 500 feet, will be built for this purpose. Water for steam production and domestic uses will be supplied by the Contra Costa Water District and transported in Dow's existing 20-inch pipeline.

Waste Water

All plant discharges will be sent back to Delta Diablo Sanitation District for discharge into their existing discharge pipe.

Web Sites
  • Link to Applicant's Web Site

  • Link to Californians for Renewable Energy (Intervenor's) Web Site

  • Return to Delta Energy Center Main Page.

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    Page Updated: December 22, 1998