After tussling with the Federal Emergency Management Agency for months over design differences, the St. Tammany Parish (La.) school system has reached a compromise on the preliminary scheme for a new Salmen High School. Salmen, in Slidell, was the only campus in a 52-school system to be destroyed by Hurricane Katrina. The school will be rebuilt as a consolidated, one-story complex at the original campus. School officials had earlier pushed for a multistory structure, asserting their design would save money and provide a model for other schools that must raise their structures in accordance with revised flood elevations.