T&D World Magazine
Structures supplement Ameren

Ameren Transmission Company of Illinois’ Herleman-Maywood 345-kV river crossing.

Mississippi Crossing

Ameren Transmission Company overcomes access challenges to place 345-kV lines across the Mississippi River.

Positioned between two levees approximately 6000 ft (1829 m) apart, the construction of a 345-kV, double-circuit river crossing over the Mississippi River inundated Ameren Transmission Company of Illinois with challenges. As part of a portfolio of multi-value projects approved by the Midcontinent Independent System Operator, this river crossing is 1.56 miles (2.51 km) long, connects the Maywood substation in Missouri and the Herleman substation in Illinois, and is part of the Illinois Riv

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