Chapter 286 of the Acts of 2014 required MassDEP to: review the Water Management Act (WMA) permit requirements revised in November 2014; review public water supply permits that include new permit conditions; and to estimate the cost of implementing those new permit conditions.
The additional reference files include background documentation for the projects and cost ranges described in Section 9 of the Report: "Financial Information on Mitigation and Minimization Requirements". You will need an unzip utility to extract the contents of these files.