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Una Residences to feature Miami’s deepest parking garage

A new construction project in Miami is going deep.

A 47-story story Una Residences condominium luxury tower will include a three-level subterranean basement, which will become Miami’s deepest, most expensive underground garage. The construction will reach nearly 50 feet and three stories below sea level, encompassing 100,000 square feet for the Una Residences condominium.

Slated to begin vertical construction next year for 2023 completion, Una is a $25 million project from OKO Group and Cain International, set on the edge of the Biscayne Bay waterfront. The 579-foot-tall tower, from architects Adrian Smith + Gordon Gill (AS+GG), was envisioned to embody the spirit of the city and the aesthetics of the Brickell neighborhood’s urban, waterfront environment. The building’s grand, doubleheight lobby was designed with 20-foot-tall glass windows that frame the sparkling views of the bay, with a resort-style amenity pool deck set directly above facing the water surrounded by shady trees and lush foliage. Una Residences will be comprised of 135 spacious condominiums featuring views of the Atlantic Ocean, Biscayne Bay, and the Miami city skyline.

The open waterfront concept could only be realized by ‘hiding’ the parking garage underground—a challenging and costly approach that contrasts sharply with typical condominium developments in South Florida, which tend to feature a pool deck situated high atop several levels of parking. To create the underground structure, the development, design, and building teams worked closely together to determine the best method for subterranean construction in such close proximity to the bay.

“OKO Group has extensive experience with subterranean construction, with our firm’s Capital City mixed-use development in Moscow encompassing a six-level garage for over 2,000 vehicles built 72 feet deep underground adjacent to the Moscow River,” said Ahmet Oktay Cini, Chief Operating Officer of OKO Group. “When conceptualizing the design for Una Residences in Miami, we envisioned a similar urban-style, efficient tower that would maximize as much space as possible for the use of residents and showcase the site’s waterfront views. The result was a modern condo tower without a parking podium, meaning more square footage for luxury amenities and residences.”

A look at current construction

In order to build a garage that doesn’t flood, the building’s general contractor, a joint venture between Civic Construction and Ant Yapi U.S., along with specialty subcontractor Keller International, set out to create a massive watertight concrete box deep underground. Using highly advanced technology and equipment, the complicated undertaking requires workers to drill 800 holes 50 feet deep into the ground and fill them with concrete and water. The interlocking pillars create a cement block that is hollowed out to build the garage.

Following the building’s groundbreaking earlier this year, the construction team embarked on the deepsoil-mixing construction process to create a giant waterproof ‘bathtub’ that protects the building’s concrete mat above the tub from the groundwater and forms the base of the garage. Engineers are now using a state-of-the-art, 10-foot high-torque drill to create the bathtub by digging into the site’s crushed limestone, while simultaneously injecting cement slurry into the ground and blending it with the limestone rock and sand. This process changes the composition of the soil, creating a support system for the bathtub’s walls and floor while ultimately reducing waterflow and permeability to allow for excavation of the site.

Once the soil mixing process and tub is complete in early 2021, the construction team will begin drilling piles 135 feet deep into the ground to support the tower, and to hold down the floor of the tub during construction. The loose-mix soil inside of the tub will then be mass excavated – a three-month-long process – to reveal the new, waterproof underground form. Once the site is excavated, the building’s steel mat foundation will then be constructed followed by a massive concrete foundation pour. Once the three levels of vertical columns are completed in the underground basement, ground-level vertical construction will then commence, estimated to take place in late 2021. From there, the tower’s rise will move at a fairly quick pace, accelerating approximately one level a week through top off of the 47th floor in late 2022.

“A below-ground garage of this caliber costs triple the amount of a typical parking garage. This kind of major investment in underground construction has never been seen before in Miami,” said William Real, President of Civic Construction Company. “The developers of Una Residences are sparing no expense when it comes to top-notch construction quality and efficient design, which will ultimately deliver a superior product for residents.”

Una Residences, at 175 SE 25th Road, range from two-to-five bedrooms, measuring between 1,100 to 4,786 square feet in size, with two ultra-exclusive penthouses available. Residences are priced from $2 million to $7.4 million, with penthouses up to $21.6 million. Learn more here.

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Drew Limsky

Drew Limsky

Editor-in-Chief

BIOGRAPHY

Drew Limsky joined Lifestyle Media Group in August 2020 as Editor-in-Chief of South Florida Business & Wealth. His first issue of SFBW, October 2020, heralded a reimagined structure, with new content categories and a slew of fresh visual themes. “As sort of a cross between Forbes and Robb Report, with a dash of GQ and Vogue,” Limsky says, “SFBW reflects South Florida’s increasingly sophisticated and dynamic business and cultural landscape.”

Limsky, an avid traveler, swimmer and film buff who holds a law degree and Ph.D. from New York University, likes to say, “I’m a doctor, but I can’t operate—except on your brand.” He wrote his dissertation on the nonfiction work of Joan Didion. Prior to that, Limsky received his B.A. in English, summa cum laude, from Emory University and earned his M.A. in literature at American University in connection with a Masters Scholar Award fellowship.

Limsky came to SFBW at the apex of a storied career in journalism and publishing that includes six previous lead editorial roles, including for some of the world’s best-known brands. He served as global editor-in-chief of Lexus magazine, founding editor-in-chief of custom lifestyle magazines for Cadillac and Holland America Line, and was the founding editor-in-chief of Modern Luxury Interiors South Florida. He also was the executive editor for B2B magazines for Acura and Honda Financial Services, and he served as travel editor for Conde Nast. Magazines under Limsky’s editorship have garnered more than 75 industry awards.

He has also written for many of the country’s top newspapers and magazines, including The New York Times, Washington Post, Los Angeles Times, Miami Herald, Boston Globe, USA Today, Worth, Robb Report, Afar, Time Out New York, National Geographic Traveler, Men’s Journal, Ritz-Carlton, Elite Traveler, Florida Design, Metropolis and Architectural Digest Mexico. His other clients have included Four Seasons, Acqualina Resort & Residences, Yahoo!, American Airlines, Wynn, Douglas Elliman and Corcoran. As an adjunct assistant professor, Limsky has taught journalism, film and creative writing at the City University of New York, Pace University, American University and other colleges.