Merrimack Station

{{#badges: CoalSwarm| Climate change}} Merrimack Station is a coal-fired power station owned and operated by Public Service Company of New Hampshire (PSCNH), a subsidiary of Northeast Utilities, near Bow, New Hampshire. One unit of the plant was built in 1960, the other in 1968. In 2008, the future of the plant became the subject of controversy when PSCNH revealed in August that the projected cost of new mercury-control scrubbers had increased from $250 million to $457 million. The scrubbers would reduce mercury emissions by 80 percent.

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Plant Data

• Owner: Public Service Company of New Hampshire
• Parent Company: Northeast Utilities
• Plant Nameplate Capacity: 459 MW (Megawatts)
• Units and In-Service Dates: 114 MW (1960), 346 MW (1968)
• Location: 97 River Rd., Bow, NH 03304
• GPS Coordinates: 43.140833, -71.46777
• Coal Consumption:
• Coal Source:
• Number of Employees:

Emissions Data

• 2006 CO₂ Emissions: 3,530,530 tons
• 2006 SO₂ Emissions: 32,726 tons
• 2006 SO₂ Emissions per MWh:
• 2006 NO_x Emissions: 4,966 tons
• 2005 Mercury Emissions: 130 lb.

Coal Sources

In 2008, the Merrimack plant burned 534.42 tons of coal from Colombia, Pennsylvania, Virginia, and West Virginia.

• Colombia: 157.2 tons, or 28.57% of the coal burned in 2008
• Greene, PA: 232.15 tons, or 43.44%
• Buchanan, VA: 8.03 tons, or 1.5%
• Marion, WV: 49.05 tons, or 9.18%
• McDowell, WV: 31.73 tons, or 5.94%
• Monongalia, WV: 60.76 tons, or 11.37%
• West Virginia total: 141.54 tons, or 26.48%

Reducing Air Pollution Emissions

In 2006, Governor Lynch signed legislation that requires all New Hampshire coal-fired power plants are required to reduce mercury emissions by 80 percent. The legislation states that the Public Service Company of New Hampshire Merrimack station has to reduce mercury using a wet flue gas desulphurization (FGD), or scrubber, system by 2013. The company is not allowed to purchase mercury credits or allowances in place of a scrubbers. The scrubber system is also expected to reduce sulfur dioxide, sulfur trioxide, and small particulate matter, as well as increase area visibility.

PSNH had until June 8, 2007 to file an application for a Temporary Permit for a flue gas desulphurization system with the New Hampshire Department of Environmental Services (DES) Air Resources Division. On June 6, 2007, PSNH filed their application for the Temporary Permit; additional information was added to their application on September 4, 2007, April 17, 2008, October 24, 2008, November 21, 2008, and December 11, 2008. On December 11, 2008, an announcement of a public hearing and request for public comments was published in the "Concord Monitor". The same announcement was published in the New Hampshire "Union Leader". The public hearing was held on January 15, 2009 and public comments were accepted until January 23, 2009.

On March 9, 2009, the Department of Environmental Services issued the final Temporary Permit for the limestone-based FGD system. The permit expires on September 30, 2010. The DES also released a Findings of Fact and Director's decision document, which contains responses to comments submitted during the winter 2008/2009 comment period. The comments are grouped into the following categories: public health, project cost, federal New Sources Review Program Requirements, future state and/or federal rules, proposed sulfur dioxide emission limits and Regional Haze Requirements, alternative operation scenarios, procedural issues on the DES's Review of the Permit Application, and the Title V Permit.

An ad hoc group of 24 businesses, led by Stonyfield Farms CEO Gary Hirshberg and including inventor Dean Kammen and Timberland President Jeffrey Schwartz, petitioned the state to reconsider the scrubbers. The group adopted the name 21st Century New Hampshire.

Energy analyst Symbiotic Strategies LLC made an assessment of the future costs to comply with increased greenhouse gas, mercury and other requirements. It came up with an additional cost of between $864 million and $2.5 billion. The impact on ratepayers would be three to six times higher than PSNH's estimated increase of one-third of a cent per kWh for the scrubber project, according to the analysis.

On March 13, 2009, the New Hampshire Senate Energy, Environment and Economic Development Committee held a hearing on SB-152, the "Mercury Reduction and Ratepayer Protection Act." The bill that would order a review of the scrubbers. About 150 trade union members attended the hearing wearing T-Shirts that said “Don’t scrub my job.” Environmentalists supported the study, as did Hirschberg's businesses coalition. Several speakers said Merrimack Station should be closed. Representatitives of the Concord and Nashua chambers of commerce testified against the bill, as did labor groups and officials from Bow, Hooksett and Manchester.

Citizen Groups

• 21st Century New Hampshire
• Environment New Hampshire

Articles and Resources

Related SourceWatch Articles

• Existing U.S. Coal Plants
• New Hampshire and coal
• Northeast Utilities
• United States and coal
• Global warming

External Articles

• Existing Electric Generating Units in the United States, 2005, Energy Information Administration, accessed Jan. 2009.
• Environmental Integrity Project, "Dirty Kilowatts: America’s Most Polluting Power Plants", July 2007.
• Facility Registry System, U.S. Environmental Protection Agency, accessed Jan. 2009.
• Carbon Monitoring for Action database, accessed Feb. 2009.
• Lisa Shapiro, "The Economic Impacts of Constructing a Scrubber at Merrimack Station," Prepared for Public Service Company of New Hampshire, March 13, 2009
• DE 08-103 Investigation into Merrimack Station Scrubber Project, New Hampshire Office of Consumer Advocate
• Gary Hirshberg, "Do we really want to give Big Coal a blank check with our money?" Huffington Post, 3/13/09
• "Power Past Coal: Citizens look to revamp New Hamp," 3/13/09