Lexington Harbor Breakwater Repair

Description

Lexington Harbor Breakwater Repair. This project includes breakwater repair operations at Lexington Harbor. The north breakwater is a permeable rubble mound structure and allows sand shoaling within the harbor. Voids in the north breakwater are exacerbating sediment infiltration within the harbor. A walkway is present atop the north breakwater. The walkway is approximately 5 feet wide and generally in good condition. The north breakwater voids are partially sand filled. The sand fill depth varies; however, sand generally extends to the existing water elevation. The project objective is to alter the existing permeable rubble mound breakwater structure to an impermeable structure. The proposed scope of work includes constructing a grout curtain wall within the structure. The proposed grout curtain wall is chemical grout and a cementitious grout material. The chemical grout material is proposed within the sand filled breakwater structure. The cementitious grout material is proposed above the sand filled area. The intent of the grout curtain wall is to prevent sand from infiltrating through the breakwater structure. The existing Portland cement concrete walkway is reconstructed upon completion of grouting operations. As previously stated, the project includes breakwater repair by constructing a grout curtain wall and Portland cement concrete walkway reconstruction. Information regarding the U.S. Army Corps of Engineers process for settling requests for equitable adjustments and duration goals to achieve definitization of equitable adjustments for change orders under construction contracts can be found by going to https://www.usace.army.mil/Strategic-Partnerships/Partnering/mod/129895/details/443/ then scrolling down on right hand side of page by clicking on ?View FFP Contract Changes Playbook Here?.