Mississippi River Crossing of Crystal City Transmission Line

The description and illustrations which follow refer to overhead wire crossing of the Mississippi River near Crystal City, Mo., of a double circuit, 132,000-volt, three-phase, 60-cycle transmission line now in the process of construction. The terminal points of this line at the present time are the Cahokia steam power station of the Union Electric Light & Power Company and the glass manufacturing plant of the Pittsburgh Plate Glass Company at Crystal City, Mo. The general location of this line is shown in the accompanying map, Fig. 1. Its length is 30.8 miles, (49.6 km.), of which 28.4 miles (45.7 km.) are in Illinois and the remainder in Missouri and in the river crossing. The purpose of this article is primarily to describe the problems involved in the river crossing.