During the rainy and king tide seasons, the Public Works Department deploys temporary diesel pumps to reduce flooding in areas throughout the City. The City has Miami-Dade County Department of Environmental Resource Management (DERM) Class V Temporary Dewatering Permits for this type of operation. In recent discussions with the regulatory agency, the implementation of additional water quality treatment systems has been requested when the temporary pumps are set up to discharge directly into Biscayne Bay. Public Works determined that the purchase of four portable 2.55 M HDPE Downstream Defenders by Hydro International is required to meet the additional water treatment requirements.
The stormwater must be treated prior to discharge, using a stormwater treatment system capable of reducing the total suspended solids and turbidity. Due to the significant site constraints associated with the typical locations where the temporary pumps are deployed, the portable water quality treatment system must meet stringent requirements, including a significantly reduced footprint, while maintaining a high rate of contaminant removal.
The portable Downstream Defender System is a well-tested product by an established manufacturer. This product is patented and provides the required enhanced treatment performance, flow capacity, materials of construction, no power or water required, vac truck accessibility, flexibility and mobility, footprint, and schedule. The Portable 2.55 M HDPE Downstream Defender System by Hydro International meets all of these constraints without exception and has a total estimated cost of $230,560 for four (4) devices, which includes 10% contingency.
Pursuant to Section 2-367(d)(2), the Procurement Department publicly released Intent to Sole Source (ITS) No. 2023-399-NA on March 29, 2023. The Intent to Sole Source (ITS) document provides details to potential bidders on the City's needs, and requests that any vendor that believes it can provide the City with the necessary items should submit written notification to the City for consideration. No response to the ITS was received.
Therefore, based on the notification from the manufacturers and the results of the ITS, this item serves as a formal request for approval for the sole source purchase of four (4) portable 2.55 M HDPE Downstream Defender Systems by Hydro International, for the purpose of stormwater treatment during king tide events in key locations throughout the City of Miami Beach.