LYNXVILLE, Wis. — The U.S. Army Corps is closing its Lynxville lockage structure the next two Tuesdays and Thursdays to all river traffic — both commercial and recreational. The closing will facilitate repairs to miter gates, the Corps said. The visitor lot and observation deck will also be closed This is 7 a.m. to 7 p.m. on July 14, 16, 21 and 23. The Corps said that miter gates become damaged and distressed over time complicating serviceability. The four-chamber Lynxville locks were built in the 1930s.