The Middletown-Norwalk (M-N) Transmission Line is a 69-mile (112 km), 345-kilovolt AC transmission line between Middletown and Norwalk in the U.S. state of

Connecticut Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its capita ...

. Construction began in 2006 with the ground breaking at the Beseck Switching Station and was energized in December 2009.

Route

The M-N Transmission Line begins in Middletown at the Scovill Rock Substation in Middletown, and proceeds west to the Beseck Switching Station in Wallingford. From Beseck the transmission line continues southwest to the East Devon Substation by overhead wires supported by 105-foot (35 m)

pylons Pylon may refer to: Structures and boundaries * Pylon (architecture), the gateway to the inner part of an Ancient Egyptian temple or Christian cathedral * Pylon, a support tower structure for suspension bridges or highways * Pylon, an orange mar ...

. At East Devon, the line will connect to the nearby Devon Power Station owned by

NRG Energy NRG Energy, Inc. is an American energy company, headquartered in Houston, Texas. It was formerly the wholesale arm of Northern States Power Company (NSP), which became Xcel Energy, but became independent in 2000. NRG Energy is involved in ener ...

and the Milford Power Company power plant before going underground. The line will continue underground to the Singer Substation in Bridgeport, where it will connect to the Bridgeport Harbor Generating Station owned by PSE&G, the Bridgeport Energy Plant owned by Duke Energy, and the Bridgeport

waste-to-energy Waste-to-energy (WtE) or energy-from-waste (EfW) is the process of generating energy in the form of electricity and/or heat from the primary treatment of waste, or the processing of waste into a fuel source. WtE is a form of energy recovery. Mo ...

plant operated by the Connecticut Resource Recovery Agency. From Bridgeport, the line will continue southwest, closely following

US 1 U.S. Route 1 or U.S. Highway 1 (US 1) is a major north–south United States Numbered Highway that serves the East Coast of the United States. It runs from Key West, Florida, north to Fort Kent, Maine, at the Canadian border, making ...

, passing Ash Creek to its terminus at the Norwalk Substation. To ease environmental and community concerns, portions of the line are being placed underground, while the overhead portions of the line will traverse mainly rural areas.

Northeast Utilities Eversource Energy is a publicly traded, Fortune 500 energy company headquartered in Hartford, Connecticut, and Boston, Massachusetts, with several regulated subsidiaries offering retail electricity, natural gas service and water service to appro ...

and United Illuminating are constructing the line at a cost of $1.3 billion. As part of the project, UI and NU will reconstruct the existing 115-kilovolt transmission lines located on segments of the M-N line's path.

References

External links

NU Transmission - Projects: Middletown-Norwalk Transmission Project
{{DEFAULTSORT:Middletown-Norwalk Transmission Line Energy infrastructure completed in 2009 Electric power transmission systems in the United States Energy infrastructure in Connecticut Norwalk, Connecticut Middletown, Connecticut Buildings and structures in Middlesex County, Connecticut Buildings and structures in Fairfield County, Connecticut 2009 establishments in Connecticut