Wind Power

Eva Creek Wind Farm

Eva Creek Wind Farm

Scope

The Eva Creek Wind Farm is a 24.6 MW wind generator facility consisting of 12 RePower Cold Climate Version MM92 turbines connected to an operating grid. Eva Creek is the largest wind project in Alaska and the northernmost wind farm in North America. It encompasses 170 acres. Michels erected the towers and installed the turbines in two strings. Each 2.05 MW turbine has a rated output of 12.5 meters per second (28 mph). Each turbine has a hub height of 80 meters, a rotor diameter of 92.5 meters, blade length of 45.2 meters, minimum wind speed of 6.7 mph and maximum wind speed of 53.7 mph. Eva Creek Wind Farm's underground 34.5 kv collection system connects each turbine to the substation via three circuits alongside an access road. The substation is connected to 230 kV transmission facilities. Due to the remote location, transportation and logistics proved to be the most challenging aspects of the project. Michels pre-construction responsibilities included design and construction of a road from the side of a rail track to the top of the ridge to accommodate large turbine components, construction of a contractor equipment yard and man-camp preparations. Turbine tower sections were shipped to the Port of Anchorage, trucked 260 miles to Healy, Alaska, and loaded onto a train. Blades came by rail barge and were taken in by train. Many steps were taken to minimize impact to wildlife in the Eva Creek area. White lights, instead of red lights, are used on the tower to minimize the risk of disorientation for birds; the turbines are placed back from the edge of the bluffs to reduce potential for interaction with soaring birds.

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