Great Lakes and Ohio River Division Lock and Dam NESP Industry Day

The Lock and Dam 25 New 1,200 ft Lock, as part of the Navigation & Ecosystem Sustainability Program (NESP), supports the Upper Mississippi River and Illinois Waterway system. The primary goals of the program are to increase the capacity and improve the reliability of the inland navigation system while restoring, protecting, and enhancing the environment through implementation of an integrated, dual-purpose plan to ensure the economic and environmental sustainability of the Upper Mississippi River System.

The existing operating project consists of a single lock; 600 feet long by 110 feet wide, with a miter gate at both the upstream and downstream ends of the lock. The existing lock is located along the right descending bank (Missouri side). The filling and emptying of the existing main lock chamber are controlled by a side port system through the land and intermediate walls. Guide walls, approximately 600 feet long, extend upstream and downstream of the lock land wall. The upstream portion of an auxiliary lock bay was originally constructed for possible future construction of an auxiliary 360-foot lock that was never built. An existing upstream guard wall extends upstream from the river wall. The dam and existing lock walls are timber pile-founded on a sand foundation. The dam consists of fourteen 60-foot-wide by 25-foot-high Tainter gates and three 100-foot-wide roller gates. An overflow dike on the Illinois side provides supplemental flow area in times of high water.

Proposed project features include construction of a new 1,200-foot pile-founded lock in the auxiliary miter gate bay, a 1,200-foot upstream ported approach wall, a 650-foot downstream approach wall, and site development to support construction activities. The existing 600-foot lock will remain in place and will become an auxiliary lock chamber used primarily by recreation traffic. Additionally, riverbed scour at the site will require construction/remediation of the foundation condition and may include large amounts of rock removal and replacement as well as large amounts of dredge material placement to reestablish the new lock foundation. Importance is also placed on minimizing impacts to current navigation traffic as well as maximizing predictability of any impacts.

The purpose of the event is to seek industry input regarding best practices and examples of past success on similar projects for the technical execution and acquisition strategy of the Lock and Dam 25 New 1,200 ft Lock. The event will begin with the District’s presentation of the project overview and will be followed by specific short presentations on the current conceptual designs for each of the major project features.

All interested parties, including prospective prime contractors, subcontractors, and suppliers, are invited to attend and must pre-register by completing the attached Registration Form and e-mailing it to Amanda Fisher at Amanda.l.fisher@usace.army.mil no later than 3:00 pm CDT on 10 June 2022. Telephonic requests will not be accepted. Registration requests must include company name, name, job title, daytime telephone number, and e-mail address of each participant. We reserve the right to limit attendees to three (3) per company depending on room constraints, but may accommodate up to five (5), if requested.