USGS Water-Year Summary 2017
01455400 LAKE HOPATCONG AT LANDING, NJ
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 at left end of Lake Hopatcong Dam on Musconetcong River, 0.9 mi north of Landing, and 2.5 mi northeast of Netcong.
DRAINAGE AREA - 25.3 mi².
PERIOD OF RECORD - February 1887 to current year.
REVISED RECORDS - WDR NJ-82-2: Drainage area; WDR NJ-83-2: Corrections 1981 (M/m).
GAGE - Water-stage recorder 1928 to 1984 and water-stage recorder with telemetry 2004 to present year. Prior to June 24, 1928, and during 1985-2004, 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 - From 1887-1928, data provided by Morris Canal employees; 1985-2004, data provided by Lake Hopatcong State Park.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 9,745,000,000 gal, Aug 13, 2000, gage height, 11.80 ft (level of Lake Hopatcong highest since dam was built in 1828); minimum contents, 1,525,000,000 gal, Dec 29, 1960, gage height, 0.65 ft.