RFI resulting in the initial selection of Central Plains Experimental Station, Goodwater Creek Experimental Watershed, Jornada Experimental Range, Little River Experimental Watershed, Little Washita River/Fort Cobb Reservoir Experimental Watersheds, Northern Great Plains Research Laboratory, R.J. Cook Agronomy Farm, Upper Chesapeake Bay Experimental Watersheds, Upper Mississippi River Basin Experimental Watersheds, Walnut Gulch Experimental Watershed as LTAR sites.