Hi John,
DCR only announced the order in which the sections will be closed, not exact dates for each. I’m assuming it depends when they finish each one.

Here is the official DCR press release, which has pretty much the same info as our announcement: http://www.mass.gov/eea/docs/dcr/news/2015/dcr-recreational-advisory-temporary-path-closures-for-the-paul-dudley-white-bike-path-in-boston.pdf