TidalMap
Explore this water on the live chart →

Grave Run near Beckleysville, MD Water Level Today

Maryland · USGS gauge 01581830 · live data · Updated Oct 28, 2026

Loading…

About this gauge

USGS gauge 01581830 sits on Grave Run and reads everything draining 7.7 square miles of the Gunpowder-Patapsco basin. Its datum sits 525 feet above sea level NAVD88. Daily flow has been on record here since 2000, 26 years of it.

Normal flows here

Grave Run runs a median of 7.2 cfs at this gauge across 26 years of record. March is the fullest month at a median 11 cfs, and September the leanest at 3.8 cfs. The highest daily mean on record is 414 cfs in 2018, and the lowest is 0.5 cfs in 2002.

Median flow by month
MonthMedian flowShare of annual median
Jan8.4 cfs117%
Feb10 cfs139%
Mar11 cfs153%
Apr11 cfs153%
May9.7 cfs135%
Jun7.1 cfs99%
Jul5.2 cfs72%
Aug4.5 cfs62%
Sep3.8 cfs53%
Oct4.4 cfs61%
Nov5.9 cfs82%
Dec7.3 cfs101%

Medians from the USGS daily-statistics record, 2000 to 2026. A month at 100% is running at its own long-term median.

Flood stages and record crests

Grave Run reaches flood stage at this gauge at 6 feet. NWS starts watching it at 5 feet. The highest crest on record is 7.8 feet, in July 2018.

NWS flood categories
CategoryGage height
Action5 ft
Minor flooding6 ft
Moderate flooding10 ft
Major flooding12 ft
Highest crests on record
WhenCrest
July 20187.8 ft
April 20086.6 ft
September 20116.2 ft
September 20044.4 ft
July 20054.4 ft

Flood categories and crest history from the NOAA National Water Prediction Service, gauge BKYM2. Stages are gage height, not depth. Not for navigation.

Nearby river gauges

Live streamflow and gage height: USGS gauge 01581830. Percentile context computed against the gauge's period of record. Not for navigation.

Open Grave Run near Beckleysville, MD on the live chart →

River pins, dam-release overlays and wadability lines live in the app, start a free TidalMap trial.