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The Department of Energy's Wind Program and the National Renewable Energy Laboratory (NREL) published a wind resource map for the state of Illinois. This resource map shows wind speed estimates at 50 meters above the ground and depicts the resource that could be used for utility-scale wind development. Future plans are to provide wind speed estimates at 30 meters, which are useful for identifying small wind turbine opportunities.
As a renewable resource, wind is classified according to wind power classes, which are based on typical wind speeds. These classes range from Class 1 (the lowest) to Class 7 (the highest). In general, at 50 meters, wind power Class 4 or higher can be useful for generating wind power with large turbines. Class 4 and above are considered good resources. Particular locations in the Class 3 areas could have higher wind power class values at 80 meters than shown on the 50-meter map because of possible high wind shear. Given the advances in technology, a number of locations in the Class 3 areas may suitable for utility-scale wind development.
This map indicates the Illinois has wind resources consistent with utility-scale production. Class 4 resource areas are located in the central and northern part of the state with the largest contiguous area located between Quincy and Springfield, north of Peoria, and near the Wisconsin border. Scattered areas of Class 4 resource are also located near Bloomington. Particular locations in the Class 3 areas of central and northern Illinois could have higher power class values at 80 meters than shown on the 50 meter map.
Note: Wind resource at a micro level can vary significantly; therefore, you should get a professional evaluation of your specific area of interest.
If you have a disability and need assistance reading the wind map, please email the Webmaster.
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