Ока
The Shukhov Tower was a part of a 110kV three-phase AC transmission line crossing the Oka River commissioned between 1927 and 1929. For the Oka River crossing, six hyperboloid pylons (three for each power-line) were built: a tall anchor pylon, a tall crossing pylon on the hillier south shore, and a tall crossing pylon on the lower terrain of the north shore.