PORTLAND — The National Hydropower Association is recognizing a Maine-based tidal power company.

The trade group has given Ocean Renewable Power Company’s “RivGen” system a 2016 Outstanding Stewards of America’s Waters Award in the category of Operational Excellence.

Its RivGen unit is a smaller version of the larger tidal energy unit that’s designed for shallow tidal applications.

Ocean Renewable is running demonstration projects in Down East Maine and in Alaska. The RivGen system is currently providing one-third of the electrical needs of a remote village in Alaska.