The U.S. Army Corps of Engineers has closed Lock and Dam No. 12 at Bellevue on the Mississippi River to replace the structure’s original gates.The lock was closed from 7 a.m. to 7 p.m. Tuesday — the lock will be closed for the scheduled replacement of miter gates. During that time, navigation is closed through the lock. Lockmaster John Mueller said these are the lock’s original gates, making them 85 years old. Mueller said subsequent 12-hour closures are scheduled for this Thursday, Oct. 3, and two days next week. He said this work is necessary due to natural metal fatigue over time.
