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Continuous data

3 data types available - data from 2000-05-04 to 2026-08-01

Daily data

1 data types available - data from 2000-04-01 to 2026-07-31

Field measurements

2 data types available - data from 2000-05-03 to 2026-06-30

Discrete sample data

0 observed properties (data types) available

Statistical tables for select daily data types

1 data types available - data from 2000-04-01 to 2026-07-31

Important information about this monitoring location

LOCATION.-- on left bank 500 ft upstream from bridge on Gunpowder Road, 0.4 mi upstream from Walker Run, 0.5 mi north of Hoffmanville, and 0.7 mi upstream from Prettyboy Reservoir. PERIOD OF RECORD.-- April 2000 to current year. GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 543.76 ft above North American Vertical Datum of 1988.

Location details and information

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Operated in cooperation with:

City of Baltimore

Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01581810	n/a
Location name	GUNPOWDER FALLS AT HOFFMANVILLE, MD	n/a
Site type	Stream	ST
Decimal latitude (WGS84)	39.68980555555555	n/a
Decimal longitude (WGS84)	-76.78147222222222	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	Maryland	24
State	Maryland	24
County	Baltimore County	005
Country	United States of America	n/a
Altitude of gage/land surface	543.76 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.13 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Gunpowder-Patapsco	02060003
Drainage basin		n/a
Date of first construction	2000	n/a
Drainage area	27 square miles	n/a
Contributing drainage area		n/a
Time zone abbreviation	EST	n/a
Site honors Daylight Saving Time	Y	n/a
National aquifer		n/a
Local aquifer		n/a
Local aquifer type		n/a
Well depth		n/a
Hole depth		n/a
Source of depth data		n/a

Monitoring location Gunpowder Falls at Hoffmanville, MD - USGS-01581810