Melvin Price Lock & Dam Main Lock Lift Gate Install & Machinery Replacement - USACE St. Louis District

INVITATION FOR BIDMelvin Price Locks and Dam is located on the Mississippi River near Alton, Illinois, approximately 21.3 river miles upstream from St. Louis and 200.8 miles above the mouth of the Ohio River.  The project consists of a main lock and an auxiliary lock; a dam containing 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 of the lock chamber.  The auxiliary lock is 600 ft by 110 ft with a set of miter gates at the upstream and downstream ends.The work will consist of furnishing all labor, equipment, operators, supervision, supplies and materials, and incidentals necessary to perform the Melvin Price Locks and Dam Lift Gate Install and Machinery Replacement Project. The work is anticipated to be accomplished with traditional river marine construction equipment, such as floating plant and barge mounted crane, and staged behind the bulkheads on the upstream end of the main lock.SEE ATTACHMENTS FOR FULL DETAILS OF THE REQUIREMENT & BID SUBMITTAL INSTRUCTIONS.AMENDMENT 0001 - 2 September 2022 - Add optional item A022, provide Site Visit Sign-In sheet, answers contractor questions recieved thus far. No other changes. See attachments for full details.AMENDMENT 0002 - 8 September 2022 - Provide additional questions & answers, extend the proposal due date, schedule another site visit, and provide additional questions due date. No other changes. See attachments for full details.AMENDMENT 0003 - 5 October 2022 - Provide Site Visit #2 Sign-In sheet as Attachment 6. No other