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Dye Tracer Studies at the Kenosha, Manitowoc, Milwaukee, and Kewaunee Harbors Confined Disposal Facilities.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS ENVIRONMENTAL LAB
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Dye tracer studies were performed at four dredged material confined disposal facilities CDFs to locate the points or areas of outflow or seepage form the CDFs. The studies were conducted for the US Army Engineer District, Detroit, at Kenosha, Wisconsin, on 8-9 May 1984 at Manitowoc, Wisconsin, on 30-31 May 1984 at Milwaukee, Wisconsin, on 17-19 September 1984 and at Kewaunee, Wisconsin, on 13-16 May 1985. The fluorescent dye Rhodamine WT was added to the water in the CDFs and allowed to disperse throughout the CDFs. Following the dispersion, the dye concentration was measured along the entire length of the interior and exterior of the dikes and filter cells of the CDFs. Using a mass balance technique and the measured dye concentrations, the relative outflow was estimated for various points and reaches along the dikes and filter cells. Discrete points of significantly higher outflow were identified at the Kenosha and Manitowoc facilities, where the dikes were constructed entirely of riprap and steel sheet piles. Reaches of significantly higher seepage, but not discrete points of outflow, were found at the Milwaukee and Kewaunee facilities, where the dikes had cores of sand or crushed limestone. Author
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