WINONA, Minn. — In desperation to find a missing Winona woman, police shifted their search to the Mississippi River. Dragnets were pulled on the river bottom from the State Highway 53 interstate bridge and along Levee Park and farther downstream. No trace was found of Patricia Sweningson on first day of the water search. The river runs as deep as 14 feet in Pool 6 behind the Trempealeau dam, which is seven miles downriver. The last known whereabouts of Sweningson, age 73, were March 4. She had a downtown apartment four blocks from the river. Winona Police Chief Tom Williams called for weekend help from the Winona and LaCrosse counites dive and rescue teams. They used sonar equipment and underwater remote-operated vehicles. K-9 teams were aboard their outboard boats and along the shores.
.
Rescue team members. In yellow garb and wetsuits on a cool day in the 40s.