Panda offers details on the 859-MW Mattawoman project in Maryland

The 859-MW Mattawoman Energy LLC project in Maryland is one of several gas-fired power projects being developed by Panda Power Funds and is needed to supply local PJM Interconnection needs in the future.

Those were among the points made by Panda officials and project consultants in Sept. 10 testimony filed at the Maryland Public Service Commission. Mattawoman Energy had applied in July with the commission for a Certificate of Public Convenience and Necessity for this project, to be located in Prince George’s County, southeast of Washington DC.

Steven Tessem, Senior Vice President for Business Development for Panda Power Funds, the parent company of Mattawoman Energy, provided the overview testimony. Other testimony came from:

  • Thomas Davis, Principal Engineer and Vice President of Environmental Consulting & Technology (ECT), on environmental aspects of the project;
  • Paul Scheuren, Principal of Impact DataSource LLC, on positive local economic impacts of the project;
  • Darren Stowe, Principal Planner and Environmental Consultant of ECT, on local land use and zoning requirements;
  • David Hessler, Acoustic Engineer at Hessler Associates, on the project’s potential for noise impacts, and how it will meet the state noise regulations.
  • Lisa Ricker, Staff Scientist and Senior Ecologist of ECT, on studies covering threatened and endangered species and wetlands; and
  • David Nelson, President of Street Traffic Studies Ltd., on how the project will affect traffic patterns during construction and operation.

“The extra capacity provided by the Mattawoman Project will help alleviate constraints in the PJM Interconnection, L.L.C. (‘PJM’) system, and also bring significant economic benefits to Maryland electricity ratepayers,” Tessem wrote. “Specifically, the Project will have a positive impact on the economics of both the State of Maryland and Prince George’s County. Creation of jobs during construction and plant operations, growth in the tax base, and the expansion of electrical generating capacity will contribute to future economic growth. Specifically, the Project is expected to create approximately 630 jobs during peak construction, and 30 full-time direct jobs and 45 indirect jobs upon commercial operation.”

Project to use Siemens turbines in two-on-one configuration

The project is an 859-MW, two-on-one, combined-cycle facility configured with two Siemens H-class combustion turbines (CT), two heat recovery steam generators (HRSG) with supplemental duct firing, and one steam turbine generator (STG) in a multishaft arrangement. This technology was picked because of:

  • an ability to provide a large number of fast starts/stops with minimal penalty to engine maintenance;
  • an ability to support the intermittent generation of renewable resources in the market;
  • an ability to serve as an economically dispatched intermediate-service generating 
station for both short-term and longer periods of peak demand;
  • the higher efficiency of electrical generation, as represented by heat rate in terms of 
Btus of gas consumed per kilowatt-hour of electricity generated;
  • the lower cost to construct on a dollars-per-MW of capacity basis;
  • the lower environmental impacts with regard to air emissions; and
  • the operational flexibility and ancillary services capability.

The project will be located at 14175 Brandywine Road, Brandywine, in Prince George’s County on an 88-acre site owned by Mattawoman. The project will interconnect to an existing 230-kV transmission line owned by Potomac Electric Power (PEPCO) adjacent to the site. Reclaimed water from the Piscataway Wastewater Treatment Plant, located about nine miles west of the project site, will be used primarily as cooling water supply. It is anticipated that natural gas supply will be provided by a gas connection to the existing Dominion Cove Point LNG LP pipeline via a new radial line to the project to be constructed by Dominion Cove Point or a similar interstate gas pipeline company.

The electricity from the plant will be sold into the wholesale market on a competitive basis. Potential purchasers include large wholesale market participants, as well as the forward and real-time PJM-operated markets. Mattawoman intends to participate in PJM’s Reliability Pricing Model (RPM) Base Residual Auction (BRA) for the 2017/2018 Delivery Year.

Mattawoman is a wholly-owned subsidiary of Panda Power Funds. The Panda team has developed, financed, constructed, and/or operated approximately 10,000 MW of natural gas-fueled capacity ranging from 180 to 2,250 MW in size. Its focus is on: domestic, greenfield power development; brownfield repowering and expansion; and developing solar projects in select states.

Panda currently has three 758-MW plants under construction in Sherman, Texas, and Temple, Texas, and one 829-MW plant in Bradford County, Pa., that were financed without long-term power purchase agreements. These plants are similar in design to the Mattawoman project. Both Mattawoman and Panda Power Funds are currently headquartered in Dallas, Texas.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.