History of Westchester county : New York, including Morrisania, Kings Bridge, and West Farms, which have been annexed to New York City / . HIGH BRIDGE. and heavy filling in deep ravines. There are on theline sixteen tunnels, varying in length from ahundred and sixty to over twelve hundred feet, andmaking an aggregate length of nearly seven thousandfeet; and the height of the ridges, above the grade-level at the tunnels, rangesfrom twenty-five to seventy-five feet. In Westchester County twenty-five streamscross theline of the aqueduct, which are from twelve toseventy feet below the grade-line,
History of Westchester county : New York, including Morrisania, Kings Bridge, and West Farms, which have been annexed to New York City / . HIGH BRIDGE. and heavy filling in deep ravines. There are on theline sixteen tunnels, varying in length from ahundred and sixty to over twelve hundred feet, andmaking an aggregate length of nearly seven thousandfeet; and the height of the ridges, above the grade-level at the tunnels, rangesfrom twenty-five to seventy-five feet. In Westchester County twenty-five streamscross theline of the aqueduct, which are from twelve toseventy feet below the grade-line, and from twenty-five to eighty-three feet below the top covering of theaqueduct. The most prominent of the valleys areLounsberrys, Indian Brook, Sing Sing Kill, MillRiver, Jewells Brook and Saw-Mill River; thefoundations of which are in no case less than fortyfeet below the grade-line, or fifty-three feet below thetop covering of the aqueduct. Besides those above five and a half inches. The bottom is an invertedarch; the side walls rise four feet above the spring-line, with a bevel of one inch to a foot rise, so that thewidth at the
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Keywords: ., bookcentury1800, bookdecade1880, bookidhistoryofwestche00scha0
