Water Valve and Pipe Replacements at National City Marine Terminal by San Diego Unified Port District

The proposed project would involve the repair and replacement of water valves and water pipe segments in the National City Marine Terminal (NCMT) to address water leaks and inoperable valves by the San Diego Unified Port District (District) in the city of National City, California. Work to specifically complete the proposed project would involve replacement of the following: • Approximately three (3) main water valves (two 12-inch, one 10-inch); • Approximately three (3) bypass valves (2-inch); • Approximately 10 feet of main water pipe connecting segments; • Associated main valve stems, risers, valve wells and caps; and • Ongoing maintenance as needed. The project would require the excavation of approximately 300 square feet of asphalt paving, which would be backfilled with clean soil (utilizing in-situ excavated materials to the maximum extent practical) and repaved with asphalt concrete. Partial closure of drive lanes within NCMT would be required during construction activities. Excavated areas would be covered with steel plates when construction activities are not being performed. The existing main water pipes are made of asbestos-concrete pipe, so a specialty contractor would dispose of the pipe sections in compliance with all applicable federal, state, and local laws. The replacement pipes would be made of alternative materials. Equipment required for construction would include a concrete saw, excavator, backhoe loader, dump truck, asphalt mill, paver, vibratory roller and associated equipment. There would be a staging area (approximately 30 feet by 30 feet) adjacent to the construction area within NCMT. Construction would start in approximately Winter 2025 and take approximately two (2) months to complete. Due to its nature and limited scope, construction of the proposed project would generate a minor amount of vehicle trips and would require limited use of equipment. Therefore, impacts related to air quality, greenhouse gas emissions, and transportation and traffic are not anticipated to occur. Furthermore, the District would be responsible for complying with all applicable federal, state, and local laws regarding construction demolition debris, hazards and hazardous materials, and stormwater.