[J. Thomas Scharf (1886)] twenty-seven feet from side to side in width and one hundred feet high. From this tank the water is dis-tributed as required. The interest of the seven hundred and forty-five thousand dollars outstanding water bonds is met by the surplus of earnings over expenses, and by direct tax laid upon the property in what is called the water district. The water act provides also for the creation of a sinking fund, and for the liquidation of the debt by installments. The aqueduct which conveys the water from Croton Lake to New York city, forms a bridge over Saw-mill river at Yonkers. In the county twenty-five streams cross the line of the Croton aqueduct, which are from twelve to seventy feet below the grade line, and from twenty-five to eighty-three feet below the top covering of the aqueduct. One of the most prominent of the valleys is that where the aqueduct crosses the Saw-mill 38 HISTORY OF WESTCHESTER COUNTY.