Design Criteria Package for the Fisher Island 20-inch Water Main Replacement
Miami Dade County, Florida
As Owner’s Representative for MDWASD, LAN completed the preliminary engineering for this $85 million Design-Build (D-B) replacement of a 20-inch water main between Port Island and Fisher Island. This project crossed under an environmentally fragile area of Miami bay near the ship channel between some of the most congested, visible, and valuable property in the United States.
LAN recommend a preferred route for the replacement, along with recommendations for D-B logistics and design criteria for the 20-inch water main. The Design Criteria Package included the preliminary engineering, specifications, standards, and design criteria for 850 LF of 60-inch diameter steel casing micro-tunnel at a depth of 100 feet.
Developing a complete and trustworthy DCP for this D-B project was essential due to the numerous internal and external stakeholders, including regulatory agencies. Using dry shafts with coffer dams situated in the bay at the island’s edge, staging on land while working on floating platforms, and the right D-B team were critical elements of this project. LAN provided the right combination of technical understanding, engineering, knowledge of local conditions, and alternative delivery experience to this project’s success.
At a glance
$85 million construction cost
Design Criteria Package development
Pipelines & Rehab