When completed in August 2007, Marengo will house 78 wind turbines, each 1.8MW, to be provided by Vestas-American Wind Technology, Inc., a subsidiary of Denmark-based Vestas Wind Systems A/S. After completion, Vestas will also provide operation and maintenance for two years. The project was developed by a subsidiary of Renewable Energy Systems Americas, Inc., and will be constructed by RES American Construction Inc.