Dozens of resorts with permits to operate on national forests have bought or acquired rights to use nearby bodies of water for snowmaking. The Forest Service had adopted a clause that said those resorts had to transfer their water rights to the federal government ... After the National Ski Areas Association sued, a judge ruled last year that the agency violated procedure in not seeking public comment before adopting the clause. The agency now plans open houses April 16 in Lakewood, Colo., on April 17 in Salt Lake City, and April 18 in Lake Tahoe, Calif., to get input.