There is plenty of terra firma under the Hynes. About 1/3 of the parcel is air rights, but the whole SW portion (everything along Dalton South of Cambria, in front of the Sheraton) is solid ground. You could easily fit a Pru or a One Dalton on the land south of the Pike land without building anything on air rights.
Correct. Why i've been saying they could plop a ~600' tower right there,
to go along with about ~625-650' at the East end of the Sheraton site.
The Boylston Sq, Copley Tower, Columbus Ctr, 1000 Boylston fiascos span 20 years. They're cautionary tales to the risk of pushing for transformative impact projects in Back Bay. It is going to have a chilling effect going forward, where City and State officials will continue sell pipe dreams to developers: except this time, developers won't be coming back..... Local and state government doesn't meet the developers half way--doesn't pony up with creative help, such as bonds for zero interest loans for site prep, w/ deferred, low-interest balloon payments.
There's nothing getting done because there's a lack of coordinated, goal oriented leadership being applied to these projects. The priority to get them done hasn't risen above the level of resistance that stops them.
The other problem is the planning authority doesn't know how to flex its muscle and lead more realistic development. We end up with phony air rights projects and mid-rise boxes, with a minimum of transformative size, impact, & public benefit.
Until we get an air rights project with a big truss and tall highrise >400' going up, the so called air rights thing will be what it's been for so long: fake news.