RIVER GAUGE · FLATLICK BRANCH
Flatlick Branch at Chantilly
Fairfax County, Virginia
Water level1.04 ft
Flow16 cfs
Last readingSep 16, 2026, 5:00 PM UTC (last recorded)
Action6 ft
Minor flood9 ft
Moderate flood10 ft
Major flood15 ft
The past week
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What floods at each level
- 15 ft
A few homes begin to flood along the stream between Route 50 and the mouth of the stream.
- 10 ft
Buildings on the right bank begin to flood.
- 9 ft
Parking lots on the right bank begin to flood.
- 6 ft
The banks begin to overflow into nearby floodplain, but there is no impact to life or property.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Sep 8, 2011 | 9.21 ft | — |
| Jul 11, 2013 | 8.06 ft | 2,830 cfs |
| Jul 7, 2015 | 7.07 ft | 1,290 cfs |
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