Highland Park Miami Residences – Phase 3

Geotechnical engineering for a large-scale mixed-use residential master plan in Miami

Near Coral Gables in Miami, Florida, Phase 3 of the Highland Park development introduced a 27‑story residential tower with a nine‑story podium as part of a larger mixed‑use master plan. ECS Group of Companies provided geotechnical engineering services for the project, supporting a joint venture between Allen Morris and Black Salmon. The development required careful subsurface evaluation to account for variable soil conditions and ensure long‑term structural performance for a high‑rise structure.

Challenge: Variable limestone and sand layers

South Florida’s geology presents unique challenges due to its alternating layers of limestone and sand. Unlike more predictable geologic formations, these layers can vary erratically in strength and depth. ECS had to carefully evaluate subsurface conditions to avoid potential settlement issues, especially important for a structure of this height. In Florida, even high-quality rock can be underlain by weak deposits, making careful analysis a cornerstone of long-term stability.

Solution: Evaluated deep and mat foundations

ECS proposed multiple foundation options, including a deep foundation system and a mat foundation alternative. A mat foundation, which is a large, reinforced concrete slab, can be a cost-effective solution when subsurface conditions allow. While the technology is not uncommon, offering this alternative for a 27-story building in South Florida is above and beyond the norm. ECS’ approach gave the client flexibility and the potential to reduce costs by removing the need for specialized deep pile contractors.