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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
- For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
- For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
- Not all sites have reports available for every water year.
USGS Water-Year Summary 2024
01581920 GUNPOWDER FALLS NEAR PARKTON, MD
LOCATION - Lat 39°37'08.6", long 76°41'25.3" referenced to North American Datum of 1983, Baltimore County, MD, Hydrologic Unit 02060003, on left bank at downstream side of bridge on Falls Road, and 1.4 mi downstream from Prettyboy Reservoir.
DRAINAGE AREA - 81.5 mi².
REVISIONS HISTORY - WDR-US-2007: 2004, 2006 (M).
SURFACE-WATER RECORDS
PERIOD OF RECORD - July 2000 to current year.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 355.43 ft above North American Vertical Datum of 1988. November 1982 to November 1990, nonrecording gage 100 ft downstream.
REMARKS - Water Year 2024: Records good. No estimated discharges.
Water Years 2022-2023: Records fair, except those for estimated discharges, which are poor.
Water Years 2020-2021: Records good, except those for estimated discharges, which are poor.
Water Years 2018-2019: Records good, except those above 4,500 ft³/s, and those for estimated discharges, which are poor.
Water Year 2017: Records good, except those above 4,500 ft³/s, which are poor. No estimated discharges.
Water Year 2016: Records good, except those above 4,500 ft³/s, which are poor. No estimated daily discharges.
Water Years 2014-2015: Records good, except those above 4,500 ft³/s and those for estimated daily discharges, which are poor.
Water Year 2013 and prior years' accuracy statements can be found in Annual Water Data Reports.
Flow regulated by Prettyboy Reservoir 1.0 mi upstream, beginning April 10, 1933, for water supply of Baltimore City (usable capacity, 20,000,000,000 gal; dead storage, 1,080,000,000 gal). U.S. Geological Survey satellite data-collection platform at station.
Flow regulated by Prettyboy Reservoir 1.0 mi upstream, beginning April 10, 1933, for water supply of Baltimore City (usable capacity, 20,000,000,000 gal; dead storage, 1,080,000,000 gal). U.S. Geological Survey satellite data-collection platform at station.
WATER-QUALITY RECORDS
PERIOD OF DAILY RECORD - WATER TEMPERATURE: March 2011 to current year.
INSTRUMENTATION - Water-temperature sensor, March 2011 to current year.
REMARKS - Missing record due to instrument malfunction.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 25.0°C, multiple occurrences recorded, first occurrence on August 04, 2018; minimum, 0.1°C, February 21, 2015.
