(Measured at High Rock Dam)
This chart indicates what typical lake levels have been each month, based on historical data from 1986-2006.*
| Month | Average Feet Below Full1 | Range Of Average Highest To Average Lowest Feet Below Full2 | Lowest Feet Below Full3 | Median Feet Below Full4 |
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| January | 7.3 | 4.0 - 11.8 | 19.4 | 7.5 |
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| February | 6.8 | 3.5 - 10.2 | 17.9 | 6.5 |
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| March | 4.7 | 2.3 - 7.7 | 16.5 | 4.3 |
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| April | 3.1 | 1.2 - 5.4 | 11.4 | 2.9 |
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| May | 2.3 | 1.1 - 3.5 | 6.4 | 2.2 |
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| June | 2.7 | 1.4 - 4.0 | 16.4 | 2.1 |
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| July | 3.5 | 2.2 - 4.7 | 24.0 | 1.9 |
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| August | 4.2 | 2.8 - 5.5 | 19.8 | 3.1 |
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| September | 4.4 | 2.8 - 6.0 | 16.4 | 3.9 |
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| October | 4.9 | 3.0 - 7.3 | 10.9 | 4.8 |
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| November | 6.6 | 4.6 - 8.8 | 13.4 | 6.7 |
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| December | 6.8 | 4.0 - 9.7 | 14.2 | 7.4 |
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1 This is the average of daily water level readings for each month. 2 This is the range of the average of the highest daily water level readings and the lowest daily water level readings for each month. 3 The maximum drawdowns generally occurred in drought years. 4 One half of the daily water level readings are above this figure and one half were below this figure for each month. * Data Source = http://www.alcoa.com/yadkin/en/environment/high_rock_graph.asp | ||||