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Toronto Hydro is considering locating a 200 megawatt wind farm off the Scarborough Bluffs in Lake Ontario as an environmentally friendly way to help meet the growing electricity needs of the city. To determine if the site is a suitable location that provides appropriate wind speeds, a tower needed to be built to support a LIDAR (Light Detection and Ranging) anemometer that could measure the wind over a one to two year period. A platform structure will be installed in the lake, elevated above water level to house the anemometer and auxiliary equipment to power the unit. The LIDAR unit is capable of measuring the wind at various elevations including the ideal hub height of approximately 80 m.
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Morrison Hershfield was retained to design a foundation and submerged structure to support the elevated platform base for the anemometer in Lake Ontario. The tower was to be located where the depth of water was about 10 to 15 m. Therefore, the design had to consider not only the loads from the platform, but also from waves prevailing at the location, and impact loads from ice floes. Morrison Hershfield also prepared construction cost estimates of the foundation.
Morrison Hershfield’s expertise in tower design combined with our expertise in submerged structures and foundations provided the client with an ideal candidate to provide a solution for this unique project.
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