The crest of the dam at Lake Hopatcong is 9.0 feet. NJSP high-water level is 9.5 feet when boat speeds are greatly restricted and no wakes are allowed. <a href="https://tinyurl.com/ydp6a8w9">Rain gage data are available from this link.</a>

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Continuous data

1 data types available - data from 2007-10-01 to 2026-08-01

Daily data

1 data types available - data from 2013-10-01 to 2026-07-31

Field measurements

1 data types available - data from 1984-04-18 to 2026-05-29

Discrete sample data

0 observed properties (data types) available

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Location details and information

Available location images

Lake Hopatcong at Landing

Lake Hopatcong at Landing

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New Jersey Department of Environmental Protection

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Metadata Element	Location Metadata	Metadata Code
Agency	U.S. Geological Survey	USGS
Location identification number	01455400	n/a
Location name	Lake Hopatcong at Landing NJ	n/a
Site type	Lake, Reservoir, Impoundment	LK
Decimal latitude (WGS84)	40.9175	n/a
Decimal longitude (WGS84)	-74.6641666666667	n/a
Latitude-longitude method	Interpolated from map	M
Latitude-longitude accuracy	Accurate to + or - 1 sec.	S
District	New Jersey	34
State	New Jersey	34
County	Morris County	027
Country	United States of America	n/a
Altitude of gage/land surface	914.5 feet	n/a
Method altitude determined	GNSS2 - Level 2 Quality Survey Grade Global Navigation Satellite System	X
Altitude accuracy	0.05 feet	n/a
Altitude datum	North American Vertical Datum of 1988	NAVD88
Subbasin hydrologic unit	Middle Delaware-Musconetcong	02040105
Drainage basin		n/a
Date of first construction		n/a
Drainage area	25.3 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 Lake Hopatcong at Landing NJ - USGS-01455400