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The article presents a study on eight ponds of the Slumgullion landslide located in San Juan Mountains of southwestern Colorado. Several laboratory flume experiments were conducted to determine the effects of particle density and a suspended load of clay particles on bedload transport of sand-sized particles. Two different methods were utilized in determining the bedload transport capacity in the first two experiments, while kaolinite-water mixture was used to replace clear water in the third experiment. It was found that there was significant increase in bedload transport as the particle density decreased, and bedload rates were not affected by a suspended load of kaolinite.