The Perris Valley Channel Lateral B, Stage 4 project involves the installation of an underground box culvert to reduce flooding to the March Air Reserve Base and adjacent properties. The project requires special permits, coordination with Base personnel, and compliance with Base requirements and procedures. The successful bidder will be responsible for constructing the storm drain, which will collect 100-year runoff from the existing Perris Valley Channel Lateral B, Stage 5 storm drain, and convey the flows south-east to the existing Perris Valley Channel Lateral B, Stage 2 at Heacock Street. Key aspects of the project include: • Installation of approximately 6,000 linear feet of underground reinforced concrete box • Construction of a temporary security fence and Base access road • Compliance with Base security requirements, including background checks and security clearance • Coordination with Base personnel to ensure uninterrupted airfield operations during construction • Submission of a Water Control Plan to address potential runoff during construction • Compliance with environmental regulations, including NEPA and CEQA