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°02'12", long 74°02'21"
referenced to North American Datum of 1983, Park Ridge Borough, Bergen
County, NJ, Hydrologic Unit 02030103, at right end of Mill Pond Dam at
the western outflow of Silver Lake (Electric Lake), 0.4 mi east of Park
Ridge, and 0.5 mi upstream of Woodcliff Lake.
PERIOD OF RECORD.--
April 2004 to current year. No record
collected from Sep 10, 2009 through May 17, 2010 due to lake being
drawn down for dam maintenance.
Water-stage and precipitation recorder with telemetry,
crest-stage gage and concrete dam. Datum of gage is 129.9 above NGVD of
Records fair, except for estimated discharges, which
EXTREMES FOR PERIOD OF RECORD.--
Maximum discharge, 3,500
/s, Aug 28, 2011, gage height, 6.72 ft; minimum discharge
EXTREMES OUTSIDE PERIOD OF RECORD.--
Flood of July 23, 1945
reached a discharge of approximately 1,300 ft3
reported by New Jersey State Water Policy Commission; dam failed,
discharge may have been greater). Flood of September 16, 1999 reached a
peak discharge of 5,730 ft3
/s (based on slope-area
computation upstream of Grand Avenue, 0.5 mi upstream from gage,
adjusted for change in drainage area).
Rain gage data is available from this location at this
Occasional dips in
stage may be due to operation of hydroelectric generators at