The BPDA board this week designated downtown-based Trinity Financial to turn what are now parking lots between Rutherford Avenue and the I-93 deck south of the Gilmore Bridge into a complex of apartments and condos.
The move means Trinity can now file detailed plans for a series of six-story buildings on the five-acre site, with a large number of affordable units: 58% of the 342 apartments and 56% of the 294 condos.
Some 100 of the apartments would be rented to people making no more than 50% of the Boston area median income, with the rest of the affordable units rented to people making up to 80% of that level. The affordable condos would be sold to people making between 80% and 100% of that level.
The company's proposal also includes an expanded home for the Charlestown Nursery School, possibly tied in with teacher programs at Bunker Hill and and health-research programs at Mass. General. The new space would also mean an increase in K0 and K1 spots for BPS.
The complex would have public greenspace, ball fields and indoor basketball courts and both indoor and outdoor space for art exhibits - and with some of the affordable apartments set aside as live/work artist studios, Trinity says. Also proposed: 21,000 square feet of retail space, including a possible family-friendly beer garden.
Solar panels will help provide electricity, while heating and air conditioning would be run off a geothermal system. The buildings, near the Community College T stop, would have roughly 274 parking spaces.
Each building would have powerful air filters to remove both viruses and particulates from the neighboring Deck, the company says.
In addition to the BPDA, state environmental officials and the Boston Conservation Commission will also have to approve the final proposal, because part of the site - now used for parking by Bunker Hill Community College - sits on what was once part of the "tidelands" for Millers River, a now shrunken tributary of the Charles that runs from roughly the Zakim Bridge to the Potato Monument. Even the Federal Railroad Administration would get a say because the project would require formal abandonment of a now unused rail spur.
Trinity's preliminary plans call for six years of construction, starting in the summer of 2025.
Trinity's winning proposal.
The other submitted proposal.