A Major Rehabilitation Evaluation Report or an MRER is - in a nutshell, a report that identifies the most economical strategy to address deficiencies in and improve reliability of a facility. In this case, the David D. Terry Lock and Dam (L&D).

David D. Terry Lock and Dam is one of 16 locks and dams on the McClellan-Kerr Arkansas River Navigation System in Oklahoma and Arkansas designed, constructed, and operated by the U.S Army Corps of Engineers.

USACE Tulsa District operates MKARNS locks and dams in Oklahoma, and the Little Rock District operates facilities in Arkansas including Terry L&D. Terry L&D has substantial problems with aging structural and mechanical components that could fail and halt navigation. As a result, SWL leadership initiated an MRER to assess potential solutions.