The Department of Defense, specifically the Department of the Army, is soliciting proposals for a Design-Build project to construct a replacement guide wall extension cell at the W.D. Mayo Lock and Dam 14, part of the McClellan-Kerr Arkansas River Navigation System (MKARNS). This project aims to enhance the structural integrity and functionality of the lock and dam system, which is crucial for maintaining navigation and water management in the region. The opportunity is set aside for small businesses under the SBA guidelines, with the NAICS code 237990, focusing on Other Heavy and Civil Engineering Construction. Interested parties should contact Tyler Hastings at tyler.a.hastings@usace.army.mil or 918-669-4396, or Shawn Adkins at shawn.a.adkins@usace.army.mil or 918-669-7483 for further details.