Navigation Conditions and Flood Conveyance at Locks and Dam No. 2, Mississippi River, Before and After Construction of a Proposed Hydropower Plant: Hydraulic Model Investigations

Abstract

Locks and Dam No. 2 are located on the Mississippi River, 1.4 miles above Hastings, Minnesota, and 26 miles south of St. Paul, Minnesota. The structure is 815.2 river miles above the mouth of the Ohio River, 32.4 river miles below Locks and Dam No.1, and 17.3 river miles above Locks and Dam No.3. Locks and Dam No. 2 were put into operation in 1931 as part of the Army Corps of Engineers Mississippi River 9-foot channel navigation project. At that time they consisted of twenty 30 ft tainter gates and a single lock on the southwest side of the river. A second lock, landward of the first, was placed into operation in 1948. The original riverward lock is today non-operational.