The RIO PUERTO NUEVO FLOOD CONTROL PROJECT, SUPPLEMENTAL CONTRACT 3, involves channel bottom and wall improvements in San Juan, Puerto Rico. The project includes various tasks such as erosion and sediment control, turbidity monitoring, environmental species monitoring, vibration control and monitoring, and more. The contractor will be required to furnish all labor, equipment, materials, and perform all tasks necessary for the project in accordance with the provided plans and specifications. The pricing arrangement for the contract is firm fixed price. • The contract includes 91 line items with estimated quantities and firm fixed prices. • The project requires the contractor to perform various tasks, including excavation, construction, and installation of different structures and systems. • The contract includes allowances for certain costs, such as electrical power charges and telecommunications charges. • The contractor will be required to acknowledge receipt of amendments and provide a total proposed price for the contract.