(This measure has not been amended since it was passed by the Senate on July 9, 2014. The summary of that version is repeated here.)
Lower Mississippi River Area Study Act - Directs the Secretary of the Interior to complete a special resource study that evaluates the national significance of a specified study area located in Plaquemines Parish in Louisiana, and the feasibility of designating such area as a unit of the National Park System.
Requires such study to: (1) include cost estimates for the potential acquisition of the study area, and (2) identify alternatives for the management and protection of such area.
Bars the study from being conducted until funding is received either by: (1) the Secretary entering into an agreement with a state, unit of local government, or other entity to conduct the study using non-federal funds; or (2) the Secretary receiving a donation sufficient to pay the cost of conducting the study.