Four Mile Run above Highway 1 at Alexandria
Flood levels
Official flood levels at this gauge: action stage begins at 4.0 ft; minor flooding begins at 7.0 ft; moderate flooding begins at 10.0 ft; major flooding begins at 12.0 ft.
| Action stage | 4.0 ft |
|---|---|
| Minor flooding | 7.0 ft |
| Moderate flooding | 10.0 ft |
| Major flooding | 12.0 ft |
Highest recorded crests
- 5.0 ft on Sep 2, 2006 (historic crest)
- 4.7 ft on Sep 10, 2018 (historic crest)
- 3.8 ft on Sep 8, 2011 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 3.8 ft | Water begins to cover the lowest spots of the Four Mile Run Trail near Route 1. |
|---|---|
| 4.0 ft | Portions of the Four Mile Run Trail are flooded. |
| 5.0 ft | Water reaches the Four Mile Run Park Trail on the Alexandria side of the stream. |
| 9.0 ft | Flooding begins on both sides of the stream, with homes and businesses likely to be affected. |
| 13.0 ft | Significant flooding begins on both sides of the stream, with major flooding of homes and businesses. |
| 21.5 ft | Water covers the Route 1 bridge over Four Mile Run. |
Forecast office: NWS Sterling · River Forecast Center: Middle Atlantic River Forecast Center.
Four Mile Run above Highway 1 at Alexandria in your pocket
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Nearby stations and gauges
- Bellevue NOAA tide station · 1.7 mi
- Four Mile Run at Alexandria NWS gauge · 1.8 mi
- Potomac River at Alexandria NWS gauge · 2.5 mi
- Alexandria NOAA tide station · 2.6 mi
- WASHINGTON NOAA tide station · 2.8 mi
- Washington Channel at SW Waterfront (IN MLLW) NWS gauge · 2.9 mi