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
Funding for this site is provided by:
Lat 40°42'30", long 74°38'10"
referenced to North American Datum of 1983, Far Hills Borough, Somerset
County, NJ, Hydrologic Unit 02030105, on left bank 75 ft upstream from
Ravine Lake Dam, 1.3 mi southeast of Peapack, 1.6 mi north of Far
Hills, and 2.3 mi upstream from Peapack Brook.
PERIOD OF RECORD.--
October 1921 to September 1975, October 1977
to current year. Operated as crest-stage gage, water years 1976-77.
Monthly discharge only for some periods, published in WSP 1302.
WSP 781: Drainage area. WSP 1552: 1922-23,
1924-25(M), 1935(M). WSP 1902: 1954.
Water-stage recorder with telemetry and crest-stage gage
above masonry dam. Datum of gage is 224.49 ft above NGVD of 1929 (New
Jersey Geological Survey benchmark). Prior to June 18, 1925,
non-recording gage in stilling box at left end of dam at same
Records fair, except for estimated discharges, which
are poor. Records formerly included diversion by small turbine at dam
(average discharge, 3.0 ft3
/s) which returned to river 1,000
ft downstream from Ravine Lake Dam. Turbine is no longer operated. Flow
regulated occasionally by operation of waste gate in dam. Discharges
above 4,000 ft3
/s from rating curve extension on basis of
flow-over-dam computation of peak flow.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 6,390
/s, from rating curve extended above 4,000
/s on basis of flow-over-dam computation of peak flow.
Aug 28, 1971, gage height, 7.28 ft; minimum discharge, 0.0
/s, occurred many days while lake was filling.
National Weather Service flood stage for
this gage is 6 ft.
Rain gage data is available from this location at this