Early in the design investigations, it became apparent that
many lines would have to be dead ended at line tension either
very near the station or in the station itself. Consequently, most
station designs are based on full-line tension at the substation
structure. This has allowed spans up to 1800 feet (550 meters) to
be brought into the station structure without a dead-end transmission
structure near the station (see Fig. 3 for a typical station
elevation view).