| 509.0 | Slight to moderate impacts on operations of Denton water plant. | | 506.0 | Moderate to severe impacts on operations of Denton water plant. | | 504.0 | Extreme impacts on operations of Denton water plant. | | 490.0 | Denton water plant is inoperable. |
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1) 536.73 ft on 05/04/1990
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1) 498.70 ft on 09/26/1980
2) 507.00 ft on 10/15/2000
3) 511.40 ft on 08/28/2006
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