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Turkey Branch near Rockville, MD Water Level Today

Maryland · USGS gauge 01647850 · live data · Updated Oct 28, 2026

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About this gauge

USGS gauge 01647850 sits on Turkey Branch and reads everything draining 2.7 square miles of the Middle Potomac-Anacostia-Occoquan basin. Its datum sits 260 feet above sea level NAVD88. Daily flow has been on record here since 2007, 19 years of it.

Normal flows here

Turkey Branch runs a median of 1.0 cfs at this gauge across 19 years of record. February is the fullest month at a median 1.4 cfs, and October the leanest at 0.6 cfs. The highest daily mean on record is 358 cfs in 2014, and the lowest is 0.1 cfs in 2015.

Median flow by month
MonthMedian flowShare of annual median
Jan1.1 cfs110%
Feb1.4 cfs140%
Mar1.4 cfs140%
Apr1.4 cfs140%
May1.4 cfs140%
Jun1.1 cfs110%
Jul0.9 cfs90%
Aug0.7 cfs66%
Sep0.6 cfs60%
Oct0.6 cfs57%
Nov0.6 cfs64%
Dec1.1 cfs110%

Medians from the USGS daily-statistics record, 2007 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

Turkey Branch reaches flood stage at this gauge at 10 feet. NWS starts watching it at 8 feet. The highest crest on record is 12.8 feet, in August 2010.

NWS flood categories
CategoryGage height
Action8 ft
Minor flooding10 ft
Moderate flooding13 ft
Major flooding17 ft
Highest crests on record
WhenCrest
August 201012.8 ft
April 201412.1 ft
May 201611.5 ft
September 202111.3 ft
April 201411.1 ft

Flood categories and crest history from the NOAA National Water Prediction Service, gauge RKVM2. Stages are gage height, not depth. Not for navigation.

Nearby river gauges

Live streamflow and gage height: USGS gauge 01647850. Percentile context computed against the gauge's period of record. Not for navigation.

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