The Greenwood County Electric Power Commission shall erect on each side of such race or spillway a fence to run to the edge of the water as follows: Along the Newberry side or steam plant side such fence shall be erected at a point two hundred and twenty-five feet from the south side of the floodgate of the hydroelectric power plant, which shall be at or near the end of the riprap or cement abutment on such side and on the Greenwood side of such spillway or race a fence shall be erected at a point two hundred and twenty-six feet south of the floodgate of such hydroelectric plant, which shall be at or near the end of the riprap or cement abutment on such side. The fence or line to be erected on either side of such race or spillway shall be of such height and so constructed as not to materially interfere with fishing as herein permitted.