PIERRE, S.D. — The South Dakota Legislature passed a compromise bill designed to reopen some submerged farmland to fishing in the northeast part of the state in a special session Monday. The special session was forced by successful lawsuits by landowners who had gone to the South Dakota Supreme Court. The governor and lawmakers were responding to commercial interests primarily in Day, Marshall and Clark counties in the northeast corner. These areas are on a glacial ridge pocked with shallow basins or potholes.