More than 90% of the surface runoff on the High Plains of Texas is collected in thousands of natural depressions or playa lakes. The basic aims given in the report are to design, construct and evaluate a series of modifications of these palya lakes. The inter-disciplinary team approach is being used to obtain one or more methods of handling surface water that will serve several purposes rather than one single purpose. The ideal modification would prevent mosquito breeding; maintain water for fish production, recreational use and migrating waterfowl; provide water for irrigation and domestic use; and reclaim valuable land for agricultural production.