Final Environmental Impact Statement

Northern Pass Transmission, LLC (Northern Pass) has applied to the DOE for a Presidential permit to construct, operate, maintain, and connect a 192-mile (309-km) electric transmission line across the United States (U.S.)/Canada border in northern New Hampshire (NH). This final EIS addresses the potential environmental impacts of the Project (Proposed Action), the No Action Alternative, and ten additional action alternatives (Alternatives 2 through 6, with variations). 

The NH portion of the Project would be a single circuit ±320 kilovolt (kV) high voltage direct current (HVDC) transmission line running approximately 158 miles (254 km) from the U.S. border crossing with Canada in Pittsburg, NH, to a new direct current-to-alternating current (DC-to-AC) converter station to be constructed in Franklin, NH. From Franklin, NH, to the Project terminus at the Public Service of New Hampshire’s existing Deerfield Substation located in Deerfield, NH, the Project would consist of 34 miles (55 km) of 345 kV AC electric transmission line. The total length of the Project would be approximately 192 miles (309 km).

Documents and Resources

The final EIS summarizes the detailed analysis contained in resource-specific technical reports. The final EIS and technical reports are available for download through the buttons below. Recognizing the public interest in the visual resource, a button linking to that information, accessible through a map, is provided below to facilitate public review.

Final EIS Documents

Technical Reports

Visual Resources

Decision Documents

Northern Pass EIS – Alternatives Considered in Detail

This map displays the alternatives considered in detail in the Northern Pass Transmission Line EIS.

The analysis of the Project was divided into three geographic sections and one administrative section defined by the White Mountain National Forest (WMNF). The Northern Section includes portions of the Project within Coös County, NH. The Central Section includes portions of the Project within Grafton and Belknap counties, NH. The Southern Section includes portions of the Project within Merrimack and Rockingham counties, NH. The WMNF Section is within the Northern and Central Sections and includes portions of the Project within the borders of the WMNF.

Users Guide:

Click the checkboxes to the left of the map to turn each section layer on or off within the map

Hover the cursor over an alternative label to the left of the map for a brief discussion (additional details about the alternatives are available in the draft EIS)

Click on any alternative features on the map for brief description

Click the checkboxes to the left of the map to turn each alternative on or off within the map (HINT: the most recently selected route will be displayed on top of any other active routes. If overlapping routes are obstructing your view of a particular route, turn the route off and on again to bring it to the top of the map.)

Alternatives are identified by color to the left of the map Dashed lines indicate sections of underground cable

Solid lines indicate sections of overhead transmission line Green points indicate converter stations and substations associated with each alternative, click on the points in the map to identify the facility


Alternative Routes

Alternative 1 - No Action is not depicted here because under the No Action Alternative the Project would not be built.

Disclaimer: The Google Map on this page is for demonstration purposes only, and may not provide exact precision for each route. For detailed and precise route maps, please see the PDF maps available in Appendix A.