Page Loading - Please Wait...
During winter months, cold and ice may result in inaccurate real-time gage height and streamflow data. Adjustments or deletions of this data can only be done after detailed analysis.
The gage height of the crest of the dam at Lake Hopatcong is 9.0 feet. NJ State Police high-water level is 9.5 feet. At lake levels above the high-water level, boat speeds are greatly restricted and no wakes are allowed.
This gage is funded by the New Jersey Department of Environmental Protection, Division of Watershed Management.
LOCATION. --Lat 40°55'03", long 74°39'51" referenced to North American Datum of 1983, Roxbury Township, Morris County, NJ, Hydrologic Unit 02040105, in gatehouse of Lake Hopatcong Dam on Musconetcong River at Landing.
DRAINAGE AREA. --25.3 mi2.
PERIOD OF RECORD. --February 1887 to current year.
GAGE. --Staff gage and water-stage recorder re-installed March 12, 2004. Prior to June 24, 1928, daily readings obtained by measuring from high-water mark to water surface converted to gage height, present datum. Datum of gage is 914.57 ft above National Geodetic Vertical Datum of 1929.
COOPERATION. --Lake Hopatcong Commission.
EXTREMES FOR PERIOD OF RECORD. --Maximum contents, 9,745,000,000 gal, Aug. 13, 2000, gage height, 11.80 ft; minimum, 1,525,000,000 gal, Dec. 29, 1960, gage height, 0.65 ft.