MPLD Main Lock Overlook Alterations

Project Description: The U. S. Army Corps of Engineers, St. Louis District is seeking a firm to perform and demonstrate capabilities and experience for work consisting of a main lock and an auxiliary lock; a dam containing a movable section of nine Tainter gates; and a fixed submersible dike reaching the Missouri Side of the River. The main lock is 1200 ft by 110 ft with a lift gate at the upstream end and a miter gate at the downstream end. The auxiliary lock is 600 ft by 110 ft with a set of miter gates at the upstream and downstream ends. The work covered by this contract consists of furnishing all labor, equipment, operators, supervision, supplies and materials and incidentals necessary to perform alterations to the Melvin Price Main Lock Overlooks. The overlooks, which are located on the upstream end of the main lock on both sides of the chamber, are single story reinforced concrete buildings that are elevated 14.5 feet above the top of the lockwall and supported by reinforced concrete columns. The structural work on each overlook consists of concrete demolition and removal via Government approved methods, and relocation/replacement of concrete columns, beams, slabs, and walls in order to shift the face the building back from the face of the lock wall approximately 4.5-feet. The demolition will require some of reinforcing steel to be left in place. Contractor designed temporary shoring of the building will be required during the demolition phase of work. The concrete demolition is to be completed above lift gate machinery that is to be protected and left in place during the work.

Dam/Tunnel, Renovation.

Division 02 -	Existing Conditions, Subsurface Investigation.
Division 31 -	Earthwork, Site Clearing, Grading, Excavation and Fill, Subgrade Preparation, Excavation, Shoring, Tunneling and Mining, Tunnel Excavation.
Division 35 -	Waterway and Marine Construction, Dam Construction and Equipment.