Project : PV-20 Submarine Cable Replacement

New York Power Authority -- Plattsburgh, New York and Grand Isle, Vermont

CHA is currently providing project management, engineering, and construction administration for the replacement of submarine transmission cables installed more than 45 years ago in Lake Champlain to connect New York Power Authority (NYPA) and Vermont Electric Power Company (VELCO). The design included four new 230 kV cables that are to be installed using horizontal directional drilling (HDD), jet plow, and direct lay techniques to minimize environmental impacts over a distance covering approximately 1.7 miles. The design also includes the removal of seven existing 115 kV cables, removal of the existing cable and terminal stations, and replacement of the transition stations on each side of the lake.

The project includes significant permitting support for New York's State Environmental Quality Review Act (SEQR) and water quality certification and Vermont Section 248 permitting process. Construction administration support includes the review of shop drawings and construction observation services.

Awards Received:

  • 2019 ACEC Vermont Engineering Excellence Awards – Merit Award (Special Projects Category)
Services Provided by CHA:
  • Project Management
  • Survey (Land and Bathymetric)
  • Geotechnical
  • Environmental Engineering
  • Civil and Structural Engineering
  • Electrical Engineering
  • Permitting Support
  • Construction Administration