Abstract: A recent and largest dike body constructed in Lisan peninsula, Jordan to retain the brine pumped from the Dead Sea is composed of marl. Investigating the properties of the marl and the influence of using brine/fresh water on the engineering behavior of this material is important, particularly during the design and construction stage in order to identify, evaluate and avert unforeseen problems. Techniques to be used to determine the engineering properties of Lisan Marl shall take into consideration the presence of soluble minerals in this soil. The properties considered in this study were mineralogy, grain size distribution, consistency limits, moisture content-dry density relationship (Proctor test), specific gravity and unconfined compressive strength. The results showed that brine water significantly increased the maximum dry density, while the optimum moisture content, liquid limit and the fine particles were decreased upon using brine for sample treatment compared with tests fresh/distilled water. The unconfined compressive strength recorded higher values upon molding the samples with fresh water.