Developer The Chiofaro Company unveiled an updated design concept for the proposed Harbor Garage Project towers Wednesday afternoon. And, if the project, Harbor Square, becomes a reality, in the future, the Boston Waterfront – and the city’s skyline – could feature two distinctly innovative skyscrapers.

During a presentation delivered to members of the Downtown Waterfront Municipal Harbor Planning Committee, Chiofaro Company brass, including founder Don Chiofaro and project manager Don “Duna” Chiofaro Jr., broke down a series of revisions that have been added to the Harbor Square proposal over the past month. In June, The Chiofaro Company presented an initial project proposal that called for two 600-plus-foot towers to anchor a 1,300,000-square-foot mixed-use development at the existing Harbor Garage site, adjacent to the residential Harbor Towers.

The revised proposal still includes 700,000 square feet of office space, a 250-300 room luxury hotel, 120 residential condominiums, three levels of retail and restaurant space, and 1,400-space parking lot built underground. The height of the two towers, however, has been reduced to an estimated 600 feet and 537 feet.

Here’s another look at the towers:

The taller of the two skyscrapers would house the development’s residential condos, while its smaller counterpart would serve as an office building. And yes, developers still want the towers to be separated by a four-season programmable, open public space that can be covered by a retractable roof.

Revisions also call for an additional access point along the Greenway, with access heights increased to 36 feet. Viewing corridors between the Harbor and the Greenway at Milk Street, E India Row, and Harbor Square have, too, been doubled in height.

According to the The Chiofaro Company, the Harbor Garage Project, estimated to cost $1 billion, would not be funded by public subsidies. Economic benefits of the project, according to the developer include $18.2 million for the City of Boston via annual hotel and real estate taxes, as well as 23.4 million for the state. The total economic impact of Harbor Square is currently estimated at $1.08 billion.

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Author’s note: The featured and header image was tweaked in order to highlight the towers against the skyline. However, Boston redditors have suggested the image isn’t particularly great. This post has been updated to include the original image.

Image courtesy of The Chiofaro Company; Kohn Pedersen Fox Associates