Mattawoman Energy works toward approval of 990-MW project in Maryland

The Maryland Public Service Commission said in a July 9 notice that it plans an Aug. 17 public hearing in Brandywine, Maryland, over a July 2013 application from Mattawoman Energy LLC for a gas-fired power project in Prince George’s County, Maryland, near Washington DC.

Mattawoman Energy, a project affiliate of Panda Power Funds, a few months ago offered a major revamp of the project, including a higher power output capacity, which has basically put this review process into overtime. The commission may be able to rule on the project on or around Sept. 30.

Said a July 2 report filed with the PSC by the company in this case: “Mattawoman Energy, LLC (Mattawoman Energy) is proposing to develop, construct, and operate a 990 megawatt (MW) natural gas-fired, combined-cycle power generating facility in southern Prince George’s County, Maryland. In addition to the power plant facility, which will be located on a 90-acre site, the project also requires construction of an approximately 10-mile long reclaimed water pipeline, an approximately 7-mile long natural gas pipeline, a 2.3-mile long electric generator lead line, and a substation.

“The project is under review by the Maryland Public Service Commission (PSC) for a certificate of Public Convenience and Necessity (CPCN). As part of that review, ecological impacts of the project are assessed and reviewed by several agencies including the Maryland Department of Natural Resources (DNR) – Wildlife and Heritage Service (WHS), the DNR Power Plant Research Program (PPRP), and the Maryland Department of the Environment (MDE) – Wetlands and Waterways Division (WWD).

Environmental Consulting & Technology, Inc. (ECT) has conducted a variety of ecological surveys for the various project components since the project was first proposed. The types of surveys conducted include vegetation community mapping, characterization and species inventory; wildlife species survey and habitat assessment; wetland and waterbodies delineation; and listed plant and wildlife surveys. Results of the surveys performed through March 2015 have been submitted to the above-mentioned agencies through a number of survey reports and environmental review documents (ERD).

“The electric generator lead line and substation site were not added to the project until late 2014 and early 2015, respectively. As such, the ecological surveys for these facilities were conducted during late fall and winter, outside of the growing season…. The PPRP requested that Mattawoman Energy perform a spring survey for both facilities to supplement the late fall/winter ecological characterization with species/conditions observed during the growing season. In addition, DNR WHS requested that a survey for Buxbaum sedge (Carex buxbaumii) be performed during the first week of June, for the portions of the project near the vicinity of where there were historical records of its occurrence (i.e. on and near the Brandywine Receiving Station). ECT ecologists performed a June 2015 survey to satisfy both agency requests.

“This report provides the findings of the June 2015 surveys for the electric generator lead line and substation site, and the results of the June 2015 Buxbaum sedge survey. It also includes a summary of changes made by MDE during a June 2015 review of the project’s proposed water body crossings along the generator lead line, natural gas pipeline and reclaimed water line, and their review of the wetland delineation on the substation site. Finally, this report provides an updated ecological impact analysis for the project as a whole.”

There has been other activity lately for this project outside of the PSC proceeding:

  • PJM Interconnection on June 25 filed with the Federal Energy Regulatory Commission a revision of an executed interconnection service agreement (ISA) with Mattawoman Energy and transmission owner Potomac Electric Power that supersedes the ISA that the commission accepted on May 7. The deal covers a natural gas-fueled combined-cycle facility arranged in a two combustion turbine and one steam turbine (2×1) configuration. Under this new ISA, on or before May 1, 2018, Mattawoman Energy must demonstrate commercial operation of all generating units. That is the same deadline as the older ISA.
  • Dominion Transmission Inc. (DTI) applied May 15 with FERC for a Certificate of Public Convenience and Necessity on a series of gas transmission projects that would provide natural gas to two planned power plants in the Washington DC area, including Mattawoman. This Leidy South Project will provide firm transportation service of 155,000 dekatherms per day (Dt/d) from the Leidy Interconnect in Clinton, Pa., to points in Loudoun, Va. The project customers, who have entered into binding precedent agreements for all of this capacity, are: Panda Stonewall LLC, Virginia Power Services Energy and Mattawoman Energy.
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.