Hannahatchee Creek at Union Road at Union
Flood levels
Official flood levels at this gauge: action stage begins at 14.0 ft; minor flooding begins at 16.0 ft; moderate flooding begins at 21.0 ft; major flooding begins at 26.0 ft.
| Action stage | 14.0 ft |
|---|---|
| Minor flooding | 16.0 ft |
| Moderate flooding | 21.0 ft |
| Major flooding | 26.0 ft |
Highest recorded crests
- 15.5 ft on Dec 25, 2015 (historic crest)
- 13.4 ft on Dec 11, 2008 (historic crest)
- 12.6 ft on Dec 15, 2009 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 14.0 ft | Bankfull conditions are reached upstream and downstream from the gage on Union Road. The marsh land surrounding the creek begins to flood. |
|---|---|
| 16.0 ft | Flood stage is reached. Minor flooding of woodlands and fields begin upstream and downstream from the gage on Union Road. |
| 18.0 ft | Minor flooding continues in the woodlands and fields upstream and downstream from the gage on Union Road. |
| 20.0 ft | Minor flooding expands further into the woodlands and fields upstream and downstream from the gage on Union Road. |
| 21.0 ft | Moderate flooding begins. Significant flooding expands further into the woodlands and fields upstream and downstream from the gage on Union Road. The water level reaches the bottom of the bridge and county officials may close the bridge. |
| 23.0 ft | Significant flooding continues to expand further into the woodlands and fields upstream and downstream from the gage on Union Road. The water level hits the bridge causing it to act like a dam. Erosion may occur to the sides of the bridge and county officials will likely have it closed. The flood waters will begin to flow over the road just north of the bridge. |
| 26.0 ft | Major flooding begins. Widespread inundation flooding expands further into the woodlands and fields upstream and downstream from the gage on Union Road. The water is close to topping the bridge as it acts like a dam. Erosion may occur to the sides of the bridge and county officials will likely have it closed. The flood waters will be from 1 to 3 feet deep over the road. |
Forecast office: NWS Peachtree City · River Forecast Center: Southeast River Forecast Center.
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