PROGRAM INFORMATION

VICTOR/GROUSE MOUNTAIN SOUTH

6/12/2008 through 10/9/2009

DATA DETAILS

June 12, 2008 through October 9, 009:

The anemometer tower was installed on June 12, 2008. The anemometer and wind vane are mounted at a hight of 53 feet (16.15 m). All data was collected by Anglogold Ashanti personnel using an NRG #40 Anemometer and NRG #200P Wind Vane. This equipment fed into an NRG Wind Explorer data logger. The data plug files were received by CSU for analysis. The data plug files and text versions of these files are given below.

Note that there is a gap in the data from May 18, 2009 at 1:20 p.m. through July 2, 2009 at 9:40 a.m.

It is important to note that these are the raw files without any compensation for offset. It is also important to note that the temperature was not recorded during this period.

Using this data, an analysis of the wind resource report was developed using Windographer 1.45. For this data an offset of +180° was applied to the wind vane data. For this report, a data validation was performed on the data. This data was filtered two ways:

1. Any wind speed data where the wind speed was less than 1 mph for 3 hours or more was deleted.
2. Any wind direction data where the wind direction varied by less than 3 degrees over 6 hours was deleted

Windographer was then used to add in synthetic data to these intervals with suspect data. The combined data files (with and without data validation), and the Windographer files (with and without data validation) are given below:

• Grouse_Mtn_South_0003_2008_0612_to_2009_1009_without_data_validation.windog
• Grouse_Mtn_South_0003_2008_0612_to_2009_1009_without_data_validation.txt
• Grouse_Mtn_South_0003_2008_0612_to_2009_1009_with_data_validation_offset_180.windog
• Grouse_Mtn_South_0003_2008_0612_to_2009_1009_with_data_validation_offset_180.txt

Current Wind Resource Summary

Highlights of the wind resource at this site are shown below:

Windographer was used to match up the wind at this site with the performance curves of some common turbines of various sizes and various heights, allowing for losses of about 18%. The table below shows the results. For the larger turbines, the tower height was increased to account for the larger turbine blades - the wind resource was extrapolated to these higher heights. Keep in mind that the larger and the higher the turbine, the better the wind and the greater the output. But of course, as the tower heights and turbine sizes increase so does the cost.

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