Merrimack Station

Merrimack Station is PSNH's prime base load plant, operating continuously to meet the state's significant electrical demand.

Initiatives at Merrimack Station have broken new ground in environmental technology, earning us numerous awards-including the Governor's Award for Pollution Prevention in 1996, and the EPA's Environmental Merit Award in 1996 and again in 1999.

The installation of a Selective Catalytic Reduction (SCR) system on Merrimack Station's Unit One boiler in 1999 caused nitrogen-oxide (NOx) emissions to be reduced by 90 percent-a reduction equivalent to removing 700,000 automobiles from the road. Today, Merrimack Station is one of the cleanest coal-fired plants in the Northeast.

Facts at a Glance:

• 478 MW output
• Supplies 189,000 residential, commercial and industrial customers
• Began commercial operation in 1968
• Operates on two coal-fired steam turbines, and two combustion turbines utilized only during great power demands
• More than $47 million invested in environmental initiatives since 1989