Adopt a Memorandum of Agreement with the City of San Diego and Advertise and Award a Construction Contract for Saturn Boulevard Pipe Extension Project and

Related CEQA Exemption (District: 1) The Saturn Boulevard Pipe Extension project is a short-term emergency action to address the ongoing public health hazards caused by contaminated, turbulent flows at the Saturn Boulevard culvert crossing in the Tijuana River Valley. The current culverts at Saturn Boulevard convey water into the downstream river where turbulence causes significant foaming and release of malodourous gas (primarily hydrogen sulfide) into the air. The project will install two durable high-density polyethylene (HDPE) pipe extensions on existing culverts, discharging flows below the water surface downstream to reduce turbulence and aerosolization. Riprap will be placed for stability and best management practices to minimize environmental impacts. The County, serving as lead agency under a Memorandum of Agreement with the City of San Diego, has completed design, secured a Coastal Development Permit from the California Coastal Commission, and will obtain emergency permits from the U.S. Army Corps of Engineers, Regional Water Quality Control Board and the California Department of Fish and Wildlife in accordance with emergency project protocols. Upon installation of a permanent infrastructure solution in the future, these two pipe extensions, riprap, and all associated components will be removed.