Excerpts from the report: Rain traps were developed as a result of water conservation research conducted by the Soil and Water Conservation Research Division, Agricultural Research Service, USDA, in cooperation with the Utah Agricultural Experiment Station. The first rain trap in practical operation was located in the Fishlake National Forest in Utah. Since then, a dozen additional units have been installed in eight States. Though research continues, the rain trap in its present state of development is a practical device to supply water for livestock, wildlife, and household uses in many areas. In addition to supplying water for the livestock, it can be located to control livestock distribution and thereby improve utilization and management of grazing lands.