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 41°09'37", long 74°20'01"
referenced to North American Datum of 1983, West Milford Township,
Passaic County, NJ, Hydrologic Unit 02030103, on right bank 700 ft
downstream from dam at outlet of Greenwood Lake at Awosting, and 3.7 mi
northeast of West Milford.
PERIOD OF RECORD.--
Continuous-record discharge station May 1919
to current year. Prior to October 1940, published as "at Greenwood
WSP 781: Drainage area. WSP 1552: 1922(M),
1928(M), 1936. WDR NJ-79-1: 1933(M), 1936(M), 1945(M), 1948(P),
1951(P), 1952(P), 1953(M), 1955(P), 1956(M), 1957(M), 1958(M), 1960(P),
1961(M), 1968(P), 1969(P). WDR NJ-80-1: 1960(P).
Water-stage recorder with telemetry. Concrete control
since Oct 31, 1938. Datum of gage is 601.32 ft above NGVD of 1929
(levels from New Jersey Geological Survey benchmark). Prior to Apr 1,
1926, non-recording gage, and Apr 1, 1926 to Oct 31, 1938, water-stage
recorder at site 100 ft upstream at same datum.
Records fair, except for estimated discharges, which
are poor. Flow regulated by gates in dam on Greenwood Lake (see
01383000). Water diverted into basin above gage from Upper Greenwood
Lake (Hudson River basin) by North Jersey District Water Supply
Commission since 1968. Discharges above 1,200 ft³/s from rating curve
extension on basis of theoretical weir formula.
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 3,290 ft³/s,
Aug 28, 2011, gage height, 7.00 ft, from rating curve extended above
1,200 ft³/s on basis of theoretical weir formula; minimum discharge,
0.00 ft³/s, many days, from when gates at Greenwood Lake were closed
and no water passed over spillway.
Occasional regulation due to gate operations at
Greenwood Lake, just upstream of the gage.