National Grid and NStar cite the failure of EMI development arm Cape Wind Associates to meet a 31 December deadline to obtain financing and start construction, and its decision not to put up financial collateral to extend it.

The 6 January announcement came two days before Charlie Baker, a Republican and project opponent, took office as governor.

As recently as last autumn, the developer was publicly confident that it would start physical seabed construction off Massachusetts by year-end, as required in the contracts.

For