The U.S. Geological Survey conducts three types of water resources activities in Louisiana - data collection, investigations, and research. These activities are conducted, in large part, through cooperation with other Federal, State, and local agencies. Water-resources activities undertaken from October 1, 1985 to September 30, 1987 are described. Specifically, the report presents information on organization of the District Office, cooperating agencies, data-collection activities, interpretive studies and research activities, new publications of the Louisiana District, and sources of information in the U.S. Geological Survey. For each activity, the following information is presented: project title, project number, study location, cooperating agency, project chief, project duration, problem, objective, approach, progress, and plans. (USGS)