The repeated performance of a number of fundamental processes lies at the heart of the mining process. These processes constitute the mining cycle (Singh and Saperstein, 1992). These fundamental processes are commonly referred to as 'unit operations' and comprise: fragmentation, loading, and haulage/transportation. There are also a number of auxiliary unit operations (such as site preparation and provision for services) but these are not discussed here. This paper deals with the selection of an ore transportation system for a planned potash mine in the Republic of Congo (Congo Brazzaville, RC).The Sintoukola potash project is a greenfield potash project located approximately 90 km north of the city of Pointe Noire in the RC. The project is located on the coastal plain between the Mayombé Mountains in the east and the Atlantic Ocean in the west. The potash deposit occurs within the Lower Cretaceous Loeme Evaporite Formation and is approximately 300 m below the surface. This evaporite sequence in the Congolese coastal basin comprises horizontal, undulating layers of salt. The targeted ore mineral is sylvinite (KCl), although carnallitite (KMgCl 3 ·6H 2 O) is also present. The sylvinite is interbedded with halite (NaCl) and other salts.The project consists of a planned underground board-and-pillar mine, a 35 km transport corridor to the coast, and a process plant and ship loading facility for export of potash to foreign markets. Underground access will be via a twin vertical shaft system. The mine and haulage/processing facilities are to be located in two of the administrative regions or sous-préfectures (Madingo Kayes and Loango) in the Kouilou Department.The project currently consists of a measured and indicated resource of 573 Mt of sylvinite, providing a sufficient reserve for a 23-year life of mine using a conventional underground mining method to produce 2 Mt/a of muriate of potash (MoP).In order to achieve this production, 6.9 Mt/a (960 t/h) of run-of-mine (RoM) ore will be mined using a room-and-pillar method, utilizing continuous miners. The RoM ore will then be transported to a dedicated processing plant located 35 km from the mine at the coast. Due to the hydrophilic nature of the salts, the ore needs to be kept dry at all times. At the processing facility, the potash salt (KCl) will be separated from the waste salt (NaCl), dried, stored, and then loaded onto barges for transhipment to ocean-going vessels using a custom-built jetty facility. The waste salt will be pre-diluted and then discharged into the ocean.A comprehensive trade-off study of all transport solutions was conducted in the early stages of the prefeasibility study (PFS). This paper describes the methodology followed to select the materials transport system for Ore transport system selection for the Sintoukola potash project in the Republic of Congo by P. Kluge*, D. Limpitlaw † , and W. Swanepoel* Material transport is one of the major components of a bulk mining system, and the selection of the most appropriate material transport system ca...