Middletown-Norwalk Case Study Page 1 of 2 250 Unique Steel Structure Designs Help Empower Massive Transmission Project An enormous undertaking, Northeast Utilities’ 345-kV Middletown-Norwalk Bulk Power Project required construction of 150 miles of both overhead and underground transmissions lines. This included 45 miles of new overhead lines, 48 miles of new underground lines, and 57 miles of reconstructed overhead lines. In addition, two new sub

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