sentences:  Middletown-Norwalk transmission line
  
  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.Construction began in 2006 with the ground breaking at the Beseck Switching Station and was energized in December 2009.