This report characterizes those contaminants associated with transport waters from coal-slurry pipelines. This was accomplished through tests using a rotating bench scale reactor. Tests consisted of coal mixed with (1) tap water, (2) tap water with additives, (3) synthetic saline water, and (4) synthetic saline water with additives. Tests were performed for a period of 12 days each. The results of the research will be useful to pipeline planners and regulatory agencies as a preliminary tool to assist them with decisions regarding slurry water quality, water reuse possibilities, and treatment and utilization options for spent slurry liquids.