http://overhead-tml.net/historicalline.html駒橋線 （我が国最古の鉄塔）(Komahashi line) The power transmission line that steel towers were used for the part for the first time in our country. The steel tower was used at the river crossings where had the long span more than 165m. The power transmission line used 22 steel towers. The steel tower was made in U.S.A. 東京電灯が建設し、明治４０年(1907)１２月20日に運転開始させた、駒橋発電所(15,000KW)から早稲田変電所迄の75.6Kmの「55KV駒橋線（２回線）」が、大都市圏における初
