The Biscayne Bay Subaqueous Water & Force Main Installation Project showcases David Mancini & Sons, Inc. (DMSI)’s unmatched capability to deliver complex marine utility installations, deep microtunneling, and large-diameter water and force main systems within one of South Florida’s most logistically demanding environments — the Port of Miami.

This multifaceted project involved furnishing and installing approximately 9,740 linear feet of 42-inch ductile iron pipe (DIP) and fittings, including a 42-inch mechanical joint resilient-seated wedge gate valve, Venturi meter assemblies, manholes, valve boxes, and concrete support slabs. The system tied directly into a proposed 36-inch water main at Biscayne Boulevard, forming a crucial component of the City’s upgraded transmission network.

DMSI performed 260 linear feet of microtunneling beneath the Florida East Coast (FEC) Railroad right-of-way, utilizing a 72-inch steel casing with drilled shafts to protect existing rail infrastructure. One of the project’s key engineering feats included 4,000 linear feet of twin 30-inch HDPE water mains and 4,000 linear feet of twin 12-inch HDPE force mains, installed via horizontal directional drilling (HDD) to achieve a subaqueous channel crossing beneath Biscayne Bay between Bayside and the Port of Miami.

Additionally, DMSI completed the replacement of Pump Station 9141 and the existing 8-inch cast iron force main, installing 5,000 linear feet of new 10-inch HDPE force main between Dodge Island (Port of Miami) and the mainland City of Miami. The project also included air release valve assemblies, polyethylene encasement, backfill operations, sheeting and shoring, and full surface restoration, encompassing pavement replacement, markings, and landscaping.

Despite tight scheduling constraints, the project was delivered on time — ahead of the arrival of the massive cruise ships returning to the Port of Miami for the first time post-upgrade, showcasing DMSI’s commitment to precision, performance, and reliability.