Based on the existing well groups and production pipelines, the Phase III well layout of Beypazari trona solution mining project fully makes use of the existing conditions. The Phase III well groups consist of several kinds of optimized well units, such as three-well units, five-well units, side parallel well units and some other complicated well units. Phase III design can highly improve the production of mining project and meet the demands of brine output in trona plant with the advantages of lower investment, shorter construction period and easier management. Totally 15 leaching units with 25 leaching passages are designed and distributed in the mining area of Phase III.