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Estimated flood stage is 4.5 feet.Occasional dips in stage may be due to operation of hydroelectric generators at site.
LOCATION. --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.
DRAINAGE AREA. --13.4 mi2.
PERIOD OF RECORD. --April 2004 to current year.
GAGE. --Water-stage recorder and concrete dam. Datum of gage is 129.9 above NGVD of 1929.
EXTREMES OUTSIDE PERIOD OF RECORD. --Flood of July 23, 1945 reached a discharge of approximately 1,300 ft3/s (as reported by New Jersey State Water Policy Commission; dam failed, discharge may have been greater). Flood of September 16, 1999 reached a 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).
COOPERATION. --Funding for this gage is provided by the New Jersey Department of Environmental Protection.
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Value Dec 21