Gives the contractual authority under AID in conjunction with the Mekong Committee and the scope, organization and principles employed in the report. Gives a general geographical description of the area and reports on the hydrography and river characteristics. Studies the area water borne commerce and economics. Describes river transport facilities and boat-building facilities at various channels, ports, ferries, and passenger landings, and summarizes costs and benefits of the projects. Discusses the comprehensive plan for the Lower Mekong Basin and coordination with regional plans. Considers the effect of the Nongkhai-Vientiane Bridge, Pa Mong Dam, and other main stem projects. Includes statistical tables, maps and preliminary engineering plans and specifications. Contains a bibliography. [TAIC]