During winter months, cold and ice may
result in inaccurate real-time lake or reservoir elevation data.
Adjustments or deletions of this data can only be done after detailed
Funding for this site is provided by:
Lat 40°53'43", long 74°23'52"
referenced to North American Datum of 1983, Boonton Town, Morris
County, NJ, Hydrologic Unit 02030103, at dam on Rockaway River, 0.5 mi
south of Boonton, and 2.5 mi upstream of Crooked Brook.
PERIOD OF RECORD.--
Continuous-record reservoir station, October
2010 to current year. From 1904 to October 2010, month-end elevation
and contents provided by United Water Jersey City.
WDR NJ-85-1: 1984, WDR NJ-94-1: 1993.
Water-stage recorder with telemetry. Datum of gage is
National Geodetic Vertical Datum of 1929.
United Water Jersey City.
Reservoir is formed by a cyclopean masonry dam with
earth wings; dam completed and storage began in 1904. Total capacity at
spillway level, 7,620,000,000 gal elevation, 305.25 ft of which
7,366,000,000 gal is usable contents above elevation 259.75 ft, sill of
lowest outlet gate. Figures given herein represent usable capacity,
prior to 1988 total capacity was published. To adjust usable capacity
to total capacity, add 254,000,000 gal. Spillway is topped with two
Bascule gates, 2 ft high; prior to 1952, flashboards were used. Flow
regulated by Bascule gates, three outlets in gatehouse at head of
conduit and by two 48-inch pipes (bottom of sluice pipes at elevation
205 ft). Water is diverted from reservoir for municipal supply of
Jersey City. Annual extremes beginning in water year 2014 can be
obtained by using this link
. Prior to water
year 2014, annual extremes can be obtained on the respective annual
water year summary
EXTREMES FOR PERIOD OF RECORD.--
Maximum contents, 8,580,000,000
gal, May 12, 1998, elevation, 309.50 ft; minimum, 1,445,000,000 gal,
Jan. 31, 1981, elevation 274.71 ft.
Rain gage data is available from this location at this link.