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(b) Upper tower with booms supporting anemometers, direction
sensors, and thermometers being lowered into place by heli-
copter. Instruments are at 18-, 30-, 40-, and 50-m levels above
the water.
Figure 2-21 (Concluded). Installation of an offshore wind measurement station in Lake
Erie atop the city's water intake structure known as the 5-mile Crib ( Courtesy of The
Renaissance Group, Kirtland, Ohio )
performing land-based wind resource assessments in Ohio since 1998. Analysis of two years
of wind speed data from the water crib tower indicated that this offshore wind resource has
a signiicantly higher annual average wind speed than any of the ten onshore locations in north-
ern Ohio where measurements were made previously by GEO [Dykes et al . 2008]. Another
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