Phase 1 of the Abbott Ave Drainage Improvements project includes construction of key drainage infrastructure components at Abbott Avenue and 91st Street in Miami Beach, Florida. The work is part of a broader drainage improvement effort consisting of pump stations, associated wet wells, valve vault structures, manholes, and catch basins intended to strengthen system performance in a coastal environment.

Because the site is located near the coastline and the groundwater table is approximately three feet below existing grade, excavation stability and water control have been major construction drivers from the start of the work. To support safe and effective installation, the team established construction limits, control points, and survey staking, then carried out excavation in a controlled sequence to maintain stable conditions in saturated soils.

A temporary wellpoint dewatering system was installed around the pump station excavation to lower the groundwater level and control inflow during construction. The system was connected to a temporary dewatering pump designed for continuous operation under high groundwater recharge conditions. Discharge water was routed through a sediment management tank to reduce turbidity and control suspended solids before being conveyed to the designated discharge point in accordance with project procedures.

With groundwater control in place, the team completed installation of the wet well box and valve vault structure. Subgrade preparation was performed to meet bearing and level requirements, and both structures were set with close attention to line, grade, alignment, and compatibility with downstream piping and mechanical systems. Temporary stabilization and active dewatering were maintained during placement to prevent flotation, protect subgrade integrity, and reduce the risk of settlement.

The project also included the heavy lift placement of Pump Station #1, which weighed approximately 110,000 pounds. A heavy-duty crane with capacity exceeding 100 tons was mobilized and assembled on site to complete the operation. The pump station was installed in two primary sections, beginning with the base section to establish final seating and alignment, followed by the riser section to complete the vertical assembly and match required elevations. Survey verification and controlled lift sequencing were used throughout to maintain plumbness, alignment, and safe rigging conditions.

Following the structural installations, the team advanced the interconnecting piping between the wet well and valve vault. This work included installation of 24-inch diameter piping and ductile iron fittings required to support alignment transitions and mechanical configuration needs. The work completed to date positions the project for the next phase, including additional mechanical and electrical integration, remaining drainage structures, and preparation for the next pump station installation.