16 Mar 2017

Lock and Dam 5A, Embankment and Levee Certification

The LD5A embankment is located along the Mississippi River about 3-1/2 river miles above the City of Winona, Minnesota, and about 3 river miles below Fountain City, Wisconsin. The St. Paul District is responsible for operation and maintenance of the LD5A embankment, as part of the LD5A dam project, authorized for the purposes of navigation and recreation. The Winona, Flood Risk Management Project was authorized by the Flood Control Act of 1958, of which the LD5A embankment was used as part of the line of protection. The LD5A embankment is approximately15,500 feet in length from its high ground tie-in point at Minnesota City, Minnesota, to the southern tie-in with the Winona FRMP.

2 Oct 2015

Mississippi River Locks and Dams 2–10 Guidewall Crib Repairs

Guidewalls are integral to each of the Mississippi River Locks and Dams 2 through 10. Guidewalls are long extensions of the lock walls, in either the upstream or downstream direction, that are parallel to the lock wall. These walls serve primarily to guide the long tows into the lock and to provide mooring facilities for tows too long to be accommodated in a single lockage. The guidewalls are constructed of multiple 35 to 40 feet length concrete monoliths with rock filled timber cribs beneath and behind them.

14 Mar 2016

Mississippi River Locks and Dams 2–10 Tow Rail System

The tow rail system is integral to the operation of each of the Mississippi River Locks and Dams 2 through 10. It is attached to the top of the lock guidewall and helps guide tows through the lock chamber. Each system is comprised of an operating unit, rail and traveling kevel or “mule.” The Locks and Dams 2 through 10 tow rail systems have been deteriorating over the past several years, requiring rehabilitation of these systems.

16 Mar 2017

Navigation: Mississippi River End Cells

The purpose of this project is to extend the longevity of the guidewalls at each of our locks and dams and to reduce operability issues and required maintenance. An end cell would provide adequate protection of the end monolith along the guidewalls, while the past crib grouting component will add stability. Lock and Dams 2 through 10, which are located from Hastings, Minnesota, to Guttenberg, Iowa.

26 Feb 2015

Navigation: Routine Dam Gate Maintenance

Maintenance of the dam spillway gates are required to avoid degradation and eventual replacement. Benefit – cost analyses show it is economically favorable to maintain the gates rather than the replacement option. There are also reliability and safety concerns with allowing the gates to degrade to the point that they must be replaced. formed on site.

16 Mar 2017

Pokegama Dam Slurry Trench Project, Grand Rapids, Minn.

Pokegama Lake Dam has undergone a series of modifications, repairs and periodic inspections over its 138-year history. The purpose of the project is to develop a Value Engineering Study, Design Charette and Preliminary Engineering Report to inform budget proposals to maintain and improve safe operation of the Pokegama Lake Dam.

27 Feb 2015

Upper Mississippi River 9-Foot Channel Navigation Project Locks and Dams, Minnesota/Wisconsin/Iowa

The U.S. Army Corps of Engineers, St. Paul District is responsible for maintaining 244 miles of the Upper Mississippi River 9-foot channel navigation system from Minneapolis, Minnesota, to Guttenberg, Iowa. The Upper Mississippi River 9-Foot Channel Navigation Project is located in or contiguous to Minnesota, Wisconsin, and Iowa. The navigation project within the St. Paul District includes 13 locks and dams that are operated and maintained by the Corps. In addition to the locks and dams, the project includes channel maintenance, recreation and natural resource activities.