USGS Water-Year Summary 2021
01581830 GRAVE RUN NEAR BECKLEYSVILLE, MD
LOCATION - Lat 39°39'17.3", long 76°46'51.3" referenced to North American Datum of 1983, Baltimore County, MD, Hydrologic Unit 02060003, on left bank off of Gunpowder Road (formerly Upper Beckleysville Road), 1,000 ft upstream from Prettyboy Reservoir, 0.9 mi north of Beckleysville, and 1.7 mi downstream from Indian Run.
DRAINAGE AREA - 7.68 mi².
PERIOD OF RECORD - March 2000 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 525.34 ft above North American Vertical Datum of 1988. Previously operated as a low-flow partial-record station during water years 1977-82 at same location.