Lake Champlain PV-20 Submarine Cable Replacement

Beneath the tranquil surface of Lake Champlain were 50-year-old oil-filled transmission cables threatening energy reliability and the environment, so their replacement became essential. CHA guided the project management, engineering, and construction administration to replace these aged cables that connect the New York Power Authority and Vermont Electric Power Company. To minimize environmental impacts, four installation methods were used. Cables on land were installed through direct burial, and trenchless installation methods were selected to avoid disturbing the lakeshore. Underwater methods, such as horizontal directional drilling (HDD), a trenchless drilling technique, were implemented to transition the cable from the land to the lake.

Through careful execution, the old cables were replaced without significant power service interruption or environmental harm. New cables were successfully laid across the lake bottom, reaching depths of up to 100 feet, ensuring the essential long-term reliability for the vital electrical interconnection.

Project summary

50 yrs.

Half-century oil-filled transmission cables were replaced.


Four methods of installation to reduce environmental impacts.

100 ft.

New cables span lake's floor, delving 100 feet.

Talk to an expert

Jason Gorman, PE, PMP*

Jason Gorman, PE, PMP*
Vice President, Project Team Leader, Senior Project Manager

Get in touch

Jason has over 25 years of project engineering and management experience in the environmental and energy fields. He is adept at securing state and federal permits for complex natural gas and electrical transmission projects, characterized by their sensitive environmental contexts and intricate regulatory coordination. He also excels at managing solid waste and water projects.