NSTAR works out construction deal for 207-MW West Medway II project

NSTAR Electric Co. on Dec. 11 filed with the Federal Energy Regulatory Commission an executed Design and Engineering Agreement with Exelon West Medway II LLC covering new capacity to be built at an existing power plant.

Exelon West Medway plans to construct an approximately 207-MW project comprised of two simple-cycle combustion turbine units on a site located in West Medway, Massachusetts. The facility would interconnect to NSTAR Electric’s 115-kV transmission system near the Medway Substation #65.

Exelon West Medway, NSTAR Electric and ISO New England are in the process of completing a Standard Large Generator Interconnection Agreement (LGIA) for this project. ISO-NE has completed studies on its regional transmission system regarding the facility’s impact, and such studies identified the need for the construction of interconnection facilities by both Exelon West Medway and NSTAR Electric. The purpose of this filed agreement is to set forth the terms and conditions under which NSTAR Electric would undertake certain design and engineering activities on facilities that were identified in ISO-NE’s studies, prior to execution of the LGIA.

In other recent developments for this project:

  • General Electric (NYSE: GE) said Dec. 8 that it is providing Exelon (NYSE: EXC) with two highly efficient LMS100PA+ aeroderivative gas turbines for the West Medway Generating Station in Medway, Mass.  Exelon has owned the three-unit, oil-fired Medway peaking facility since 2002, and the two LMS100 units are a good fit for the space available at the existing site, GE noted. The new units will be powered primarily by natural gas, with Ultra Low Sulfur Diesel (ULSD) as a back-up. The existing Medway units will continue to operate.
  • Two Exelon subsidiaries on Sept. 30 filed with the Massachusetts Energy Facilities Siting Board a Draft Environmental Impact Report covering the West Medway II Project. Exelon West Medway LLC and Exelon West Medway II LLC had filed in March for approval of this project. Exelon’s existing 135-MW West Medway power plant is located on the northeastern portion of the Summer Street site. The western half of the Summer Street site is occupied by two Eversource switchyards (one 345 kV, one 115 kV) and associated transmission rights of way.
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.