The state’s new transportation secretary threw the brakes on development of a prime Greenway parcel in Boston Wednesday afternoon, saying he had concerns about "the financial viability of the proposals."

Prospective developers of the Greenway Parcel 9, which sits adjacent to Faneuil Hall, have been waiting for the state to designate a developer for the strategically located site since the summer. Four proposals have been submitted.

Now, the state’s new transportation super-agency is taking a step back and re-reviewing financials from all four of the site’s bidders.

In October, former transportation secretary James Aloisi said he expected a decision on the parcel "promptly."  But at last month’s transportation board meeting, the vocal Haymarket pushcart association reversed course and pulled its support from Eastat Realty Capital’s $45 million housing proposal, which had widely been seen as the state’s favorite.

Massachusetts Department of Transportation Secretary Jeffrey Mullan told the state’s transportation board today that he was asking Peter O’Connor, the department’s development chief, to "take a fresh look at the financial proposals and financing plans for each of the proposals before I make a further recommendation to the board."

Mullan said that "the vocal opposition we have heard cause me to question the willingness of an investment team to get behind the project at this time. Uncertainty in this economic environment is simply not a good thing."

"Our project has always been financially viable, and it remains financially viable," said Eamon O’Marah, managing partner of Eastat Realty Capital. "We look forward to working with the state, the city, and other stakeholders to get the project going."

The AFL-CIO Housing Investment Trust committed to funding Eastat’s proposal several months ago. In October, the fund’s regional marketing director, Paul Barrett, told Banker & Tradesman, "It’s a project we’re ready to move on. We have the funds ready and waiting to invest. We have to put them to work. We are anxious to put our money to work."